NewControls Engineer JobotControls EngineerAllentown, PA$110,000–$145,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This role requires a strong combination of controls engineering, PLC programming, electrical design, system integration, and customer-facing communication skills.
NewElectrical Engineer - Power Studies JobotElectrical Engineer - Power StudiesReading, PA$110,000–$180,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Their team helps ensure equipment operates safely and consistently by applying strong expertise in electrical engineering, on-site technical support, and workforce training.
NewSenior Controls Engineer JobotSenior Controls EngineerAllentown, PA$125,000–$145,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The Senior Controls Engineer is responsible for designing, programming, commissioning, and supporting industrial automation systems for conveyor, robotic, and systems integration projects.
NewMechanical Engineer JobotMechanical EngineerAllentown, PA$110,000–$115,000 / yearAs we continue to grow, we're looking for a motivated Project Engineer who enjoys solving complex engineering challenges, collaborating with cross-functional teams, and seeing innovative designs come to life. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewLighting Sales Engineer JobotLighting Sales EngineerWarwick, PA$100,000–$110,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Become a technical expert across our full product line of lighting controls and inverters, and transfer that knowledge to customers, reps, and internal teams.
Uptime Spec and Design Engineer Penske Truck RentalUptime Spec and Design EngineerREADING, PAPenske Truck Leasing/Transportation Solutions is a premier global transportation provider that delivers essential and innovative transportation, logistics and technology services to help companies and people move forward. This role will also assist in real world testing data from our equipment’s systems as they are designed today as the Project Manager assists in optimizing system operation or problem resolution.
VPSA Process Engineer NucorVPSA Process EngineerBethlehem, PAPerform process simulations and calculations, write process specifications, and provide accurate process data to support compressors, air chiller, adsorption systems, distillation columns, cold boxes, control valves, relief valves, manual valves, pumps, heat exchangers, tanks, pipeline measurement equipment, analyzers, silencers, cooling towers, and other air separation equipment components specifications and purchasing. UIG owns and operates production plants across the USA which supply both Nucor steel sites and third-party clients 24/7 with tonnage quantities of oxygen, nitrogen and argon as well as exporting liquid cryogenic products by road tanker.
NewIndustrial Engineer III - Continuous Improvement GeodisIndustrial Engineer III - Continuous ImprovementNorthampton, PALeads detailed engineering process on building/operational changes to take the design from conceptualization to full detailed design ready for implementation by performing data analyses, developing material handling specifications, working with vendors to obtain quotes, and generating a detailed, engineered AutoCAD layout with fitment into the selected facility. Prepares engineering documents to describe solution and detailed operating concepts such as storage and shipping capacity, zoning, slotting, waving, etc. and facilitates reviews with key work stream leads including engineering peers, WMS Implementation, and operations.
Distribution Engineer LeidosDistribution EngineerReading, PA$59,150–$106,925As a valued team member, you can look forward to a fast paced, diverse work environment and flexible work hours/work arrangements, as well as managers who will encourage career development and growth opportunities, including Professional Engineer License (PE) , Project Management Professional (PMP) , Leadership training, Formal Mentorship Programs, Management opportunities. Gain experience in coordinating conflicting utilities and other field engineering design requirements, assessing and developing large design packages for complex cable/conduit projects in dense urban environments, work permit development, easements, and ROW applications.
NewManufacturing Engineer Quality Focus Reading TruckManufacturing Engineer Quality FocusReading, PATechnical Expertise - Effectively applies technical knowledge to solve a range of problems; Develops technical solutions to new or highly complex problems that cannot be solved using existing methods or approaches. The Manufacturing Engineer – Quality Focus is responsible to assist/lead employees in achieving expected safety, quality, delivery, inventory, and cost targets for the team ensuring the product is conforming prior to customer delivery.
NewQuality Engineer Reading TruckQuality EngineerReading, PATechnical Expertise - Effectively applies technical knowledge to solve a range of problems; Develops technical solutions to new or highly complex problems that cannot be solved using existing methods or approaches. Communication - Ensure that others involved in projects or problem-solving are kept up to date; speaks clearly to others; tailors content of speech to the level and experience of audience; expresses ideas clearly and concisely in writing.
NewIndustrial Engineer Quality Reading TruckIndustrial Engineer QualityReading, PATechnical Expertise - Effectively applies technical knowledge to solve a range of problems; Develops technical solutions to new or highly complex problems that cannot be solved using existing methods or approaches. The Industrial Engineer – Quality is responsible to assist/lead employees in achieving expected safety, quality, delivery, inventory, and cost targets for the team ensuring the product is conforming prior to customer delivery.
Senior Software Engineer JobotSenior Software EngineerWarminster, PA$50–$70 / hourWorking alongside executive leadership and our internal Production Manager, you will help transform the way our company operates by developing a unified operating system that supports Business Development, Estimating, Production, Accounting, Permitting & Job Compliance, and Executive Reporting. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Onsite Field Service Engineer Aixtron SEOnsite Field Service EngineerEaston, PAPerform the troubleshooting, warranty/service repairs, preventative maintenance, predictive maintenance, system monitoring, upgrades, and system installation as needed of AIXTRON reactors at customer's site according to the on-site service contract or as part of key account management. Our team of sales managers, field service and process engineers, and logistics specialists provides customers across North America with high-level technical support, training, and guidance on system operation, maintenance, and optimization.
Field Service Engineer Progress RailField Service EngineerReading, Berkshire£40,500–£45,000As a Field Service Engineer, you will be instrumental in maintaining the customer's locomotive fleet to ensure safe and reliable operation, through the delivery of proactive and reactive, scheduled and unscheduled maintenance at various locations including railway sidings, depots and customer sites. This is predominantly a lone working role where you will be expected to work autonomously using tools and procedures available to you as well as your own initiative and skillset, to ensure vehicles are reliable and accessible for the customers services.
Field Service Engineer - Philadelphia, PA (King of Prussia, Allentown, Doylestown, Cherry Hill, Medord) Danaher CorpField Service Engineer - Philadelphia, PA (King of Prussia, Allentown, Doylestown, Cherry Hill, Medord)Doylestown, PARemote$65,000–$70,000 / yearWhat you'll do: Technical: The Field Service Engineer will be responsible for meeting the daily service repair needs of the customer's equipment by driving customer satisfaction through Service Excellence: Basic troubleshooting, installation, preventive maintenance and repair needs on designated equipment, as well as ordering and maintaining spare parts inventory. Customer Service: The Field Service Engineer will maintain regular communication with customers to ensure resolution and accurate follow-up; utilizing documented processes and root cause analysis to resolve customer service issues and drive customer satisfaction.
Field Service Engineer - Philadelphia, PA (King Of Prussia, Allentown, Doylestown, Cherry Hill, Medord) DanaherField Service Engineer - Philadelphia, PA (King Of Prussia, Allentown, Doylestown, Cherry Hill, Medord)Allentown, PARemote$65,000–$70,000 / yearWhat you'll do: Technical: The Field Service Engineer will be responsible for meeting the daily service repair needs of the customer's equipment by driving customer satisfaction through Service Excellence: Basic troubleshooting, installation, preventive maintenance and repair needs on designated equipment, as well as ordering and maintaining spare parts inventory. Customer Service: The Field Service Engineer will maintain regular communication with customers to ensure resolution and accurate follow-up; utilizing documented processes and root cause analysis to resolve customer service issues and drive customer satisfaction.
NewField Service Engineer StratAcuity Staffing Partners IncField Service EngineerAllentown, PA$33–$43 / hourIn terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts.
CT/MRI/PET-CT Field Service Engineer MXR Imaging, Inc.CT/MRI/PET-CT Field Service EngineerAllentown, PAFull timeTraining RequirementsESD Training (ESA and EF)Cold Stress TrainingHIPAAHeat Stress TrainingDepartmental Procedures as required to the roleQuality Key Process Indicators and Policy, Good Documentation PracticesSafety awareness initiatives and protocolsSoftware utilization Preferred:An Associate Degree in Electrical Engineering or military-trained in electronics, equivalent certified electrical training or equivalent experience on electronic equipment is a PLUS.Travel:Must be willing to travel within the United States.
Field Service Engineer Fuller Technologies - USAField Service EngineerAllentown, PAYou'll work directly with customers to commission equipment, troubleshoot process issues, optimize plant performance, and provide technical expertise on some of the industry's most advanced cement processing equipment. Knowledge of cement equipment such as kilns, raw mills, finish mills, VRMs, roller presses, preheaters, coolers, or burners.
Field Service Engineer Teledyne TechnologiesField Service EngineerCollegeville, PAThese markets include aerospace and defense, factory automation, air and water quality environmental monitoring, electronics design and development, oceanographic research, deepwater oil and gas exploration and production, medical imaging and pharmaceutical research. As a Field Service Engineer, you play a vital role in ensuring our customers' laboratory and process operations run reliably, safely, and at peak performance.
Field Service Engineer (Medical) ESCO Lifesciences GroupField Service Engineer (Medical)Horsham, PennsylvaniaThis role requires superlative customer -facing skills, and being adept in hands-on problem solving, providing technical support & training, manage schedule & inventory, provide design feedback, and a sense of adventure to travel & discover new things. JOB PURPOSE: The Field Service Engineer is responsible with ensuring that our customers have a superior experience with our IVF Medical products.
NewVentomatic® Field Service Engineer Fuller Technologies Mexico SA de CVVentomatic® Field Service EngineerAllentown, PennsylvaniaRole summary Support and stabilize the Ventomatic® installed base, reducing downtime and improving safety and repeatability across GIROMAT®, INFILROT®, POLIMAT®, and VENTOSORT®/VENTOCHECK® systems. Produce a structured post-visit report within 48 hours including findings, tagged photos/versions/serials, quick wins, and a prioritized spare parts list.
Field Service Engineer 3 OSI Systems IncField Service Engineer 3Allentown, PA$36.05–$41.82 / hourhas three operating divisions: (a) Security, providing security and inspection systems, turnkey security screening solutions and related services; (b) Healthcare, providing patient monitoring, diagnostic cardiology and anesthesia systems; and (c) Optoelectronics and Manufacturing, providing specialized electronic components and electronic manufacturing services for original equipment manufacturers with applications in the defense, aerospace, medical and industrial markets, among others. Driven by the belief that anyone who seeks care could be a member of our own family, our team is dedicated to solving the greatest challenges the healthcare system currently faces, including the need to enhance the patient experience, improve population health, reduce costs, support care team well-being, and advance health equity.
Field Service Engineer - Allentown, PA Danaher CorpField Service Engineer - Allentown, PAAllentown, PA$31–$38 / hourAt Beckman Coulter Life Sciences, we know time is the most critical facet in the laboratory today: time to get life-saving therapies to patients faster; reclaiming time by automating tedious manual workflows; and saving time spent addressing erroneous or complex results. The amount and availability of any bonus, commission, benefits, or any other form of compensation and benefits that are allocable to a particular employee remains in the Company's sole discretion unless and until paid and may be modified at the Company's sole discretion, consistent with the law.
Lead Substation Electrical Engineer Aspen Technical Staffing, IncLead Substation Electrical EngineerReading, PAPerform substation grounding calculations and studies, lightning protection and insulation coordination, lighting, bus calculations, transformer and bus sizing calculations, fault calculations, and AC and DC auxiliary system sizing calculations. Drawings include site plans, plan and elevation views, grounding, conduit, lighting, lightning protection and shielding, control building arrangements and details, AC station service, DC systems and Bills of Material.
Senior Electrical Engineer Power Systems Shermco Industries IncSenior Electrical Engineer Power SystemsWyomissing, PAThis position will serve as both a technical lead and client-facing engineering advisor responsible for developing electrical infrastructure solutions, leading projects, mentoring junior engineers, and helping customers improve the reliability, safety, and performance of their power systems. Shermco is seeking a Senior Electrical Engineer with extensive experience designing and upgrading medium voltage electrical distribution systems for industrial, commercial, healthcare, pharmaceutical, and mission-critical facilities.
Senior Principal Instrumentation Engineer Aspen Technical Staffing, IncSenior Principal Instrumentation EngineerReading, PAThis role will serve as a key technical resource within the instrumentation and controls engineering team and will work closely with project stakeholders, customers, procurement, construction, commissioning, and other engineering disciplines. The ideal candidate will bring significant instrumentation and controls engineering expertise, strong project leadership capabilities, and the ability to provide technical direction across complex, multidisciplinary projects.
Commissioning and Substation Services Engineer FirstEnergy CorpCommissioning and Substation Services EngineerPhillipsburg, NJ$100,800–$145,800 / yearQualifications at the Engineer IV level include all of the above plus: Bachelor of Science Degree in Electrical Engineering (BSEE) or Bachelor of Science Degree in Mechanical Engineering (BSME) from an ABET accredited school or be a professionally certified engineer (PE License) and have a Bachelor of Science Degree in a technical subject (Engineering Technology, Physics, etc.) is required. Communicating across multi-disciplined teams to include electrical contractors, customers, FirstEnergy regional switchmen/technicians, transmission operations, design engineering, planning/protection and project management to ensure successful and timely project completion.
NewLead Power Systems Engineer PROTOGEN INCLead Power Systems EngineerQuakertown, PARemoteFull timeWe serve clients across multiple sectors including commercial & industrial companies, real estate developers, educational institutions, national laboratories, federal agencies, state energy offices, and municipal and tribal governments. Founded with a mission to advance the energy transition by creating alignment among energy stakeholders, we bring together deep technical expertise, strong leadership capabilities, and exceptional educational skills to serve our diverse client base.
Senior Radio Frequency (RF) Attenuation Engineer Deployed Global Solutions LLCSenior Radio Frequency (RF) Attenuation EngineerPerkasie, PA$115,000–$125,000 / yearPart timeA Veteran owned full-service national security operation, Deployed Global Solutions, LLC (DGS) delivers low visibility, intelligent, agile, resilient, and secure turnkey mission solutions that are tailored to meet the global needs of our customers. This job operates in professional office, workshop, production facility, and field environments which can include working near moving mechanical parts, non-weather wet or humid conditions, and extreme cold and heat.
Field Service Engineer II Fuller TechnologiesField Service Engineer IIAllentown, PennsylvaniaPrevious experience in providing technical support on industrial equipment highly preferred, you will be responsible for providing PT technical support to customers and FLS employees. For over a century, we’ve supported the people behind the solutions, fostering a culture where hard work is valued, learning is encouraged, and teamwork drives success.
Senior Substation Electrical Engineer Johnson Service GroupSenior Substation Electrical EngineerReading, PAIdeal candidate should have strong interpersonal and written communication skills that permit working efficiently alongside other senior substation engineers and designers in a team setting. The Senior Substation Electrical Engineer will provide engineering support for the design of substation facilities for 69kV and above for Client and its customers as an integral part of the Power Networks team.
Supervising Engineer PPL CorpSupervising EngineerAllentown, PAOur high-performing regulated utilities - PPL Electric Utilities, Louisville Gas and Electric, Kentucky Utilities and Rhode Island Energy - provide an outstanding experience for our customers, consistently ranking among the best utilities in the nation. We are committed to doing our part to advance a cleaner energy future and drive innovation that enables us to achieve net-zero carbon emissions by 2050 while maintaining energy reliability and affordability for the customers and communities we serve.
Quality Engineer (PSP) Veeco Instruments IncQuality Engineer (PSP)Horsham, PAFrom the smartphones in our pockets that access the world's collective knowledge, to the cloud-based services where all that information lives, to high-speed wireless communication and computing power needed to drive artificial intelligence, augmented and virtual reality, gaming and so much more, our technology is all around us. We design, develop, manufacture, and service highly complex, cutting-edge machines used by our customers to create the essential devices that drive the digital age, connect the world, and improve the human experience.
Lead Substation Protection and Controls Engineer Leidos Holdings IncLead Substation Protection and Controls EngineerAllentown, PA$107,900–$195,050 / yearUtilities and mobile operators rely on our Power Delivery Services Team for reliable power and telecommunication expertise, as reflected through our work with more than 50 investor-owned utilities, more than 160 municipals/cooperatives, as well as a growing number of mobile operators, local utility providers and private developers. Leidos seeks the best and the brightest, and in return, we invest in you, with an eye on your future, through career advancement, growth opportunities and continuous improvement via mentoring, formal and informal project management training and assistance with obtaining pertinent certifications.
NewSupervising Engineer PPL Services CorporationSupervising EngineerAllentown, PennsylvaniaOur high-performing regulated utilities — PPL Electric Utilities, Louisville Gas and Electric, Kentucky Utilities and Rhode Island Energy — provide an outstanding experience for our customers, consistently ranking among the best utilities in the nation. We are committed to doing our part to advance a cleaner energy future and drive innovation that enables us to achieve net-zero carbon emissions by 2050 while maintaining energy reliability and affordability for the customers and communities we serve.
Supervising Engineer - Distribution Automation PPL Services CorporationSupervising Engineer - Distribution AutomationAllentown, PennsylvaniaOur high-performing regulated utilities — PPL Electric Utilities, Louisville Gas and Electric, Kentucky Utilities and Rhode Island Energy — provide an outstanding experience for our customers, consistently ranking among the best utilities in the nation. We are committed to doing our part to advance a cleaner energy future and drive innovation that enables us to achieve net-zero carbon emissions by 2050 while maintaining energy reliability and affordability for the customers and communities we serve.
NewMechanical Engineer ASGCO Manufacturing, Inc.Mechanical EngineerNazareth, PAFull timePosition: Mechanical EngineerLocation: Nazareth, PASIGN-ON BONUSASGCO engineers, manufactures, and distributes a wide array of conveyor and screening components, all specifically designed for the above-ground and underground mining, aggregate, cement, recycling, bulk shipping terminals, pulp and paper, food processing and other bulk material handling industries. The ideal candidate is mechanically inclined, thrives in a team environment, and is excited to work directly with customers and internal departments to develop innovative bulk material handling solutions.
NewWater & Wastewater Civil Engineer Keystone Consulting EngineersWater & Wastewater Civil EngineerAllentown, PAFull timeWhat you BringBachelor's degree in Civil Engineering from an ABET-accredited program5+ years of relevant experience in water systems, wastewater systems, municipal improvement projects, land development, or related civil engineering design. You will have the opportunity to work closely with municipal and private clients, project managers, design teams, regulatory agencies, and field staff to deliver practical, cost-effective solutions that support the communities we serve.
Principal Field Applications Engineer Coherent CorpPrincipal Field Applications Engineerhorsham, PAWe are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program.
Wireless Engineer I myHR Partner IncWireless Engineer IAllentown, PAThis role supports customer projects in the field while helping candidates build hands-on wireless networking knowledge alongside experienced engineers. Velaspan, Inc. is a computer systems consulting firm specializing in wireless communications and cybersecurity solutions for businesses across a wide range of industries.
Mechanical Engineer Veeco Instruments IncMechanical EngineerHorsham, PAOverview: The Mechanical Engineer, based in Horsham, PA, will be responsible for the mechanical design and development of complex wafer processing equipment involving wet processing technologies used in the manufacturing of advanced semiconductors, LEDs, displays, photonics, VCSELs, power electronics, compound semiconductors, hard disk drives, MEMS and wireless chips. From the smartphones in our pockets that access the world's collective knowledge, to the cloud-based services where all that information lives, to high-speed wireless communication and computing power needed to drive artificial intelligence, augmented and virtual reality, gaming and so much more, our technology is all around us.
Senior Principal Electrical Engineer Johnson Service GroupSenior Principal Electrical EngineerReading, PASubstantial technical land practical experience in electrical engineering in the same or similar industry including experience in working in multi-disciplinary projects and teams. Perform electrical engineering services such as: Participate in relevant meetings, prepare progress reports and follow required checking procedures.
Senior Radio Frequency (RF) Attenuation Engineer Deployed Global SolutionsSenior Radio Frequency (RF) Attenuation EngineerPerkasie, PennsylvaniaA Veteran owned full-service national security operation, Deployed Global Solutions, LLC (DGS) delivers low visibility, intelligent, agile, resilient, and secure turnkey mission solutions that are tailored to meet the global needs of our customers. This job operates in professional office, workshop, production facility, and field environments which can include working near moving mechanical parts, non-weather wet or humid conditions, and extreme cold and heat.
Distribution Engineer Leidos Holdings Inc.Distribution EngineerReading, PA$59,150–$106,925 / yearAs a valued team member, you can look forward to a fast paced, diverse work environment and flexible work hours/work arrangements, as well as managers who will encourage career development and growth opportunities, including Professional Engineer License (PE), Project Management Professional (PMP), Leadership training, Formal Mentorship Programs, Management opportunities. Gain experience in coordinating conflicting utilities and other field engineering design requirements, assessing and developing large design packages for complex cable/conduit projects in dense urban environments, work permit development, easements, and ROW applications.
NewField Service Engineer II, Operational Services Fuller TechnologiesField Service Engineer II, Operational ServicesAllentown, PennsylvaniaIn this role, you will work closely with customers and site teams to ensure safe and efficient operation of equipment, while delivering high-quality field service support. Developing optimized process solutions to customers on FULLER specific equipment kilns (Rotax), coolers (SF, MMC, CB), burners (Duoflex, Jetflex) and other cement processing equipment.
Engineer I/II/III/Principal - Substation Engineering PPL CorpEngineer I/II/III/Principal - Substation EngineeringAllentown, PAPrincipal Engineer: ABET Accredited bachelor's degree in engineering or engineering technology plus 10 years of engineering experience, or a master's degree in engineering plus 8 years of engineering experience, or a PhD in Engineering plus 7 years of engineering experience. Engineer III: ABET Accredited bachelor's degree in engineering or engineering technology plus 5 years of engineering experience, or a master's degree in engineering plus 3 years of engineering experience, or a PhD in Engineering plus 2 years of engineering experience.
Senior Field Engineer JBT Marel CorpSenior Field EngineerChalfont, PAProvide initial focus on sensor calibration best practices, including identifying when recalibration or deeper review is needed for underperforming vehicles related to automation kit performance. This position supports a customer-dedicated SME program with the objective of enabling site teams to use a consistent troubleshooting methodology and to independently assess system performance issues.
Radio Frequency (RF) Attenuation Engineer Deployed Global Solutions LLCRadio Frequency (RF) Attenuation EngineerPerkasie, PA$110,000–$115,000 / yearPart timeA Veteran owned full-service national security operation, Deployed Global Solutions, LLC (DGS) delivers low visibility, intelligent, agile, resilient, and secure turnkey mission solutions that are tailored to meet the global needs of our customers. This job operates in professional office, workshop, production facility, and field environments which can include working near moving mechanical parts, non-weather wet or humid conditions, and extreme cold and heat.