Project Engineer, ADC West Amazon Data Services, Inc.Project Engineer, ADC WestSidney, OHThe Data Center Project Engineer will be part of the onsite Construction Management team and will own the communication coordination with our vendors, information workflow, and coordination of document management, including requests for information (RFI), change orders, reports, and schedule updates. • Developing and maintaining comprehensive tracking systems for design modifications, RFIs, and change orders, creating detailed dashboards with priority levels and deadlines for regional leadership review.
Data Center Controls Engineer, Data Center Capacity Delivery - Controls Amazon Data Services, Inc.Data Center Controls Engineer, Data Center Capacity Delivery - ControlsTrenton, OHAWS Data centers have multiple components such as generators, uninterruptable power sources, diesel generators, electrical switchgear, power distribution units, variable frequency drives, automatic/static transfer switches, chillers [air-cooled and water-cooled], pumps, cooling towers, heat exchangers, CRAHs, air economizers, etc. • Frequently visit (locally) assigned in-operation data centers to troubleshoot, meet customers, supervise vendor’s work to ensure compliance with the scope, design, SOO and applicable local codes.
Controls Engineer Amazon Data Services, Inc.Controls EngineerHilliard, OHAWS Data Centers have multiple components such as generators, uninterruptable power sources, diesel generators, electrical switchgear, power distribution units, variable frequency drives, automatic/static transfer switches, chillers [air-cooled and water-cooled], pumps, cooling towers, heat exchangers, CRAHs, air economizers, etc. - Frequently visit (locally) assigned in-operation data centers to troubleshoot, meet customers, supervise vendor’s work to ensure compliance with the scope, design, SOO and applicable local codes.
Avionics Engineer B-2 Div (WBZ) 01.6.14/15 CredenceAvionics Engineer B-2 Div (WBZ) 01.6.14/15Wright-Patterson Air Force Base, OHMust have an ABET accredited Master’s or Doctorate Degree in a related field and ten (10) years of experience in the respective technical/professional discipline being performed, five (5) years of which must be in the DoD; OR must have an ABET accredited Bachelor’s Degree in a related field and twelve (12) years of experience in the respective technical/professional discipline being performed, five (5) years of which must be in the DoD; For engineering positions, must have successfully completed an undergraduate degree with a major in engineering from a college or university with an ABET-accredited engineering program for the degree requirements of the position, such as electrical, mechanical, or aerospace engineering. Assist in producing or reviewing technical evaluations/plans; engineering studies, reports, and analyses; acquisition strategies/plans; ICD; CDD; CONOPS; CPD; system requirements documents; system specifications; RFPs; SEP; TEMP; ISP; PPP; cybersecurity plans; security authorization package documentation; CCA compliance documentation; and other program, technical, and weapon system contractor-produced artifacts as required.
Mechanical Engineer CE-1.1.5 CredenceMechanical Engineer CE-1.1.5Wright-Patterson Air Force Base, OHPrepare, develop, or review design calculations, cost estimates, schedules, underlying analysis, technical drawings, and specifications related to a wide variety of projects and mechanical systems, including plumbing, potable water, sanitary sewer, Heating, Ventilation, and Air Conditioning (HVAC), fire suppression, control and alarm systems, IICS, and other systems of major size and complexity for multi-story office buildings, large steam plants, hospitals, hangars, flight simulators, and similar structures. Assist in the creation of contract document packages required for the award of construction projects, including the project folder, liquidated damages, green procurement, quality assurance plan, nomination form for quality assurance representative, funding documents, and period of performance.
Radar / Electronic Warfare Engineer B-52 Div (WBD) - 1.3.14 CredenceRadar / Electronic Warfare Engineer B-52 Div (WBD) - 1.3.14WPAFB, OHUtilize MIL-HDBK-516 Airworthiness Certification Criteria to determine applicable requirements, work with base engineering to verify assigned systems and subsystems meet established criteria and work with other agencies as required, to achieve a desired level of certification. Assist in accomplishing data processing including centroiding, tracker, timing issues, data loading issues, software; interfaces to combat system and/or automation systems including required data, quantity of data, data merging and integration.
Structural Project Engineer Integrity Technical ServicesStructural Project EngineerGroveport, OH$100,000–$120,000 / yearFull timeIn this role, you will lead the structural design of complex industrial equipment used in air pollution control, including furnaces, boilers, incinerators, and pressure processing systems like autoclaves. Produce complex engineering calculations and sketches for support structures, access platforms, ductwork, vessels, and industrial buildings.
NewField Engineer- Hyperscale Data Center PlanIT GroupField Engineer- Hyperscale Data CenterBowling Green, OHUnder the supervision of Project Management, the Project Engineer's responsibilities include, but are not limited to, development of pre-work and post work submittal packages, processing, validating and compiling cable test reports, drafting and processing RFIs, preparing change order requests, verifying field conditions against design documents, ensuring working sets of drawings and specifications are kept up-to-date, maintaining redline / as-built drawing sets and keeping project records appropriately filed. Strong leadership presence with the ability to mentor junior field staff, lead site walks, and represent the telecom discipline in cross functional meetings.
Utility Design Engineer Integrity Technical ServicesUtility Design EngineerCanton, OH$80,000–$100,000 / yearFull timeA Canton, Ohio area engineering firm seeks an experienced Utility Product Design Engineer who is capable of providing designs and engineering calculations for structural steel pole structures used in conjunction with traffic signal structures. Experience with traffic signal mast arm poles, high mast lighting, traffic signal structures, tower structures, electrical transmission poles & towers and/or surveillance camera poles.
Structural Engineer Integrity Technical ServicesStructural EngineerCanton, OH$80,000–$110,000 / yearFull timeCanton, Ohio area Manufacturing Firm seeks a Civil / Structural Design Engineer who has experience planning out and formulating design structures to support High Voltage Power Transmission Lines. Review structural designs with the engineering team and mentor junior level engineers and designers.
NewField Engineer PlanIT GroupField EngineerBowling Green, OHTechnical Software Stack: High proficiency using construction management and engineering applications including Bluebeam, Procore, Textura, and MS Visio, alongside the core MS Office Suite (Excel, Word, Outlook, PowerPoint). Our client is seeking a highly structured, detail-oriented Field Engineer to serve as the critical technical liaison between office project management and field execution at our hyperscale data center construction site in Bowling Green, OH.
Advance Planning Engineer, Senior-WAX 1.04.02 CredenceAdvance Planning Engineer, Senior-WAX 1.04.02Wright-Patterson Air Force Base, OHThe Advance Planning Engineer shall assist in conducting and supporting all engineering and technical activities required during the material solution analysis, technology development, engineering and manufacturing development, production and deployment, and operation and support phases of the systems acquisition process to include the following: requirements definition and analysis, architecture design, implementation, integration, verification and validation, transition, decision analysis, requirements management, risk management, interface management, and configuration management. Assist in producing architectures which assess user needs, document the planned and existing systems intended to meet the needs, determine deficiencies, develop and recommend alternative solutions to meet the deficiencies, and support development of a plan to implement the chosen solution.
Mechanical Engineer Integrity Technical ServicesMechanical EngineerStow, OH$70,000–$90,000 / hourFull timeThis is a "bridge " role where you will lead mechanical machine design, oversee assembly processes, and manage technical workflows within an ERP environment. Design End of Arm Tooling (EOAT) and robot cages; troubleshoot and program Wittmann robots.
Service Engineer Pinnacle Technical ResourcesService EngineerSandusky,, OhioContractorThe specific compensation for this position will be determined by several factors, including the scope, complexity, and location of the role, as well as the cost of labor in the market; the skills, education, training, credentials, and experience of the candidate; and other conditions of employment. Successfully placed or hired candidates would only be asked for banking details after accepting an offer from us during our official onboarding processes as part of payroll setup.
Senior Facilities Engineer Vaco LLCSenior Facilities EngineerDayton, OH$80,000–$95,000 / yearDetermining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs. Determining compensation for this role (and others) at Vaco/Highspring depends upon a wide array of factors including but not limited to the individual’s skill sets, experience and training, licensure and certifications, office location and other geographic considerations, as well as other business and organizational needs.
Nuclear Engineer V, Mechanical System OneNuclear Engineer V, MechanicalPerry, OHThis role is ideal for a senior mechanical engineer with deep PWR/BWR plant knowledge, strong design modification experience, and a proven ability to improve plant safety, reliability, and performance. Perform engineering calculations, feasibility studies, and technical evaluations to resolve equipment reliability concerns and improve overall plant performance.
Intern - Software Engineer (Manufacturing Systems) HTC Global Services IncIntern - Software Engineer (Manufacturing Systems)Perrysburg, OHFull timeYou will work alongside experienced engineers, learn modern software development practices, and contribute to real-world projects that support manufacturing, reliability, and R&D systems. Ideal for graduates with coursework or project experience in C#, NET, SQL, or object-oriented programming who are eager to learn enterprise software development.
Field Engineer Keller North America, Inc.Field EngineerCleveland, OH$70,000–$80,000 / yearChange Management• Works with Project Manager to track and log any changes to the project.• Assists project team in identifying changes that need to be escalated. Performs quality control tasks including data tracking, completion of field logs and daily reports, load tests, and performing quality checks.
Project Engineer Keller North America, Inc.Project EngineerCleveland, OH$80,000–$100,000 / yearFinancial Management • Analyzes targets and goals, job cost summaries, and other reports.• Creates and obtains approval of the initial budget and subsequent updates/changes.• Reviews weekly job cost summaries and advises the Project Manager.• Collaborates with pre-construction and the project team to manage the job transition process, communicate project requirements, and develop the initial procurement plans and budgets.• • Bachelor’s degree in Civil Engineering or Construction Management with a minimum of 3 of industry-related experience.• Excellent computer, written and verbal communication skills necessary.•
Electrical Project Engineer Integrity Technical ServicesElectrical Project EngineerCanton, OH$60,000–$100,000 / yearFull timeIf you have medium voltage experience, strong electrical design expertise, and thrive in a fast-paced manufacturing environment, this is an excellent opportunity to advance your engineering career with an industry leader in power distribution and electrical solutions. This role requires hands-on collaboration with engineering, production, and customers to deliver high-quality electrical equipment solutions.
Outside Sales Representative - Trench Safety Sunbelt RentalsOutside Sales Representative - Trench SafetyColumbus, OH$40,000–$62,965 / yearWork with accounts payable on delinquent accounts, assist with AP to communicate with customers, collect payments from customers and maintain accurate customer records. Develop and execute territory sales plans to expand existing customer base and develop new customers within assigned territory and market segments to "grow the business".
Project Engineer - Commercial Construction Michael Page USAProject Engineer - Commercial ConstructionColumbus, OH$80,000–$95,000 / yearFull timeYou'll gain exposure to complex projects, collaborate directly with senior leadership, and play an integral role in delivering successful builds from conception to completion. If you're an ambitious construction professional looking to build your future with a market-leading contractor that offers exceptional career advancement, cutting-edge projects, and long-term stability, this is an opportunity you won't want to miss.
NewLoss Control Engineer V- #26-17558 US Tech Solutions, Inc.Loss Control Engineer V- #26-17558New Albany, OHCollaborate with our internal teams to monitor the safety programs on project sites and maintain a good working relationship to facilitate zero incidents. Must hold sufficient industry knowledge to understand the design and deployment of technical electrical and mechanical systems as related to data center construction processes.
NewLoss Control Engineer V- # 26-17551 US Tech Solutions, Inc.Loss Control Engineer V- # 26-17551New Albany, OHNeeds person to focus on New Albany Data Center/Live space – existing building owners – knowing how to navigate XFN aspect of working/Non-confrontational - Dealing landlords, tenants, neighbor. Collaborate with our internal teams to monitor the safety programs on project sites and maintain a good working relationship to facilitate zero incidents.
NewEnvironmental Engineer III LFP AssociatesEnvironmental Engineer IIIColumbus, OH$85,000–$100,000 / yearTheir Ohio facility houses lighting and mold design, construction, production engineering, and dedicated associates in their Quality, Assembly, Sales, and Customer Service departments. Leading and implementing Carbon Neutrality projects, data collection activities and reporting of Sustainability efforts.
Electrical and Instrumentation Engineer Aminov Search PartnersElectrical and Instrumentation EngineerAshtabula, OH$90,000–$120,000 / yearThis pivotal position ensures the enhancement and safety of our site's electrical and instrumentation systems, with a strong emphasis on electrical reliability and troubleshooting. Join a leading global manufacturer that prides itself on fostering work-life balance, encouraging professional growth, and maintaining a cooperative work environment.
Sr. Electrical Engineer Aminov Search PartnersSr. Electrical EngineerAshtabula, OH$95,000–$120,000 / yearActing as the primary expert for electrical systems, you will collaborate seamlessly with maintenance, operations, and reliability teams to ensure the seamless operation of plant activities, focusing on both immediate needs and strategic asset management. This role is pivotal, providing expert leadership in enhancing system stability and equipment performance in support of continuous operations at two production sites and an on-site Air Separation Unit.
Environmental Engineer Aminov Search PartnersEnvironmental EngineerGrove City, OH$75,000 / yearOversee the Hazard Communication/Safety Data Sheet (HAZCOM/SDS) program concerning material management. The position is responsible for managing and overseeing the organization's ecological policies and initiatives to ensure they adhere to relevant laws.
Sr. Project Sales Engineer - Industrial Refrigeration Gables Search GroupSr. Project Sales Engineer - Industrial RefrigerationCincinnati, OH$110,000–$125,000Project Sales Engineer - Industrial Refrigeration (Contracting and Contractor Sales, Project Engineering Experience) to join an entrepreneurial minded client in the Industrial Refrigeration/HVAC Industry, in their in our Cincinnati, OH office. You will support our growth and operations through making initial contacts with customers (new and existing), discussing their needs at a high level, and providing quotes while building long term relationships.
DevSecOps Engineer ARCTICOM LLCDevSecOps EngineerKettering, OHParticipate and contribute to a team of resources with the collective knowledge, skills and provide subject matter expertise in Oracle EBS solution Architecture, Oracle Database, Real Application Clusters, Governance Risk & Compliance, Oracle Discoverer, User Productivity Kit, Service Oriented Architecture (SOA) suite, BPEL, Oracle Single Sign-on, Oracle Access Manager, Oracle Internet Directory, Application Development Framework, Oracle Data Integrator, Oracle OEM, Fusion Middleware, OBIEE, Flex Deploy, and Groovy programming language in a Cloud environment. Arcticom, LLC provides network and systems administration, enterprise architecture and resource planning, certification and accreditation, software design, programming, maintenance of telecommunications and land mobile radio equipment and systems, help desk support and IT transformation services among other services.
Quality Engineer Gables Search GroupQuality EngineerGallipolis, OHThis role supports manufacturing operations by monitoring product quality, analyzing defects, implementing corrective actions, and driving continuous improvement within the production process. Lead investigations using proven problem-solving techniques for quality, supplier, and internal issues.
NewProject Engineer Michael Page USAProject EngineerCleveland, OH$70,000–$90,000 / yearFull timeRequirements The Project Engineer will be required to lead or assit in: Providing project leadership and establish, implement and support a proactive project safety culture Manage the development and review of bid packages to procure competitive subcontract proposals Manage job-site subcontractor meetings to ensure that the project goals are met Review monthly invoices and oversees documentation and approval needed to ensure timely funding for the project Lead the management of cost reporting including but not limited to contracts, purchase orders, and scope revisions to achieve defined project goals Ensure overall financial health of the project and project forecasts Represent our client in the subcontract negotiations Excellent written and oral communication skills with various parties including management, subcontractors, consultants, architects, vendors and clients.
Project Engineer - Commercial & Multifamily Michael Page USAProject Engineer - Commercial & MultifamilyColumbus, OH$75,000–$90,000 / yearFull timeThis Project Engineer role supports large-scale builds while managing multiple active projects. A privately held construction firm with nearly a century of history and ~330 employees across multiple specialized entities.
Construction Project Engineer - Commercial Ground Up Michael Page USAConstruction Project Engineer - Commercial Ground UpColumbus, OH$80,000–$90,000 / yearFull timeKnown for its collaborative culture, low turnover, and strong repeat business, the firm invests heavily in training and internal progression while maintaining a reputation for quality and safety. An established construction contractor is seeking a Project Engineer to support MEP-focused projects across healthcare, education, and commercial sectors.
Controls Manager Amazon Data Services, Inc.Controls ManagerDublin, OHThe candidate will possess industrial Controls System experience, project management, mechanical, electrical or technology background that enables him/her to undertake the challenges of sophisticated controls platforms and a demonstrated ability to think broadly and strategically in aligning building controls and automation with the larger objectives of the business. The Data Center Capacity Delivery team is looking for exceptional individuals to join our organization as a Controls Manager, responsible for the building management systems and electrical power monitoring system (BMS/EPMS) deployment and service within Amazon data centers.
TOL3 - Maintenance Manager Amazon.com Services LLC - A57TOL3 - Maintenance ManagerPerrysburg, OHYou will blend strategic planning, financial management, and leadership development while navigating between managing preventative maintenance programs, coordinating with operations teams, and responding to emergencies that require quick, decisive action. In this critical role, you'll oversee Area Maintenance Managers and their teams, develop strategic maintenance programs, and drive operational excellence across multiple functional areas.
Safety Engineer Hensel Phelps Construction CoSafety EngineerColumbus, OH$74,100–$81,900 / yearHowever, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor's legal duty to furnish information. Driven to deliver EXCELLENCE in all we do and supported by our core values of Ownership, Integrity, Builder, Diversity and Community, Hensel Phelps brings our clients visions to life with a comprehensive approach that begins with innovative planning and extends throughout the life of the property.
Product Safety Engineer - Gas Controls & Accessories CSA GroupProduct Safety Engineer - Gas Controls & AccessoriesCleveland, OhioBased throughout North America and reporting directly to the Product Group Managers (PGM’s), this is a dynamic opportunity with growth potential for a keen, systematic and process-oriented individual who is able to see the big picture and be attentive to detail. Collaborate with Lab Technician to create a work order which test are required and; the order of the tests and the number of samples required.
Product Safety Engineer CSA GroupProduct Safety EngineerCleveland, OhioBachelor's Degree in Engineering with likely 6 or more years of job related experience; or Degree / Diploma in Engineering Technology or related technical field with 8 or more years’ experience. Collaborate with Lab Technician to create a work order which test are required and; the order of the tests and the number of samples required.
NewSr. Specialist, EHS - Energetics Safety Engineer L3Harris Technologies IncSr. Specialist, EHS - Energetics Safety EngineerCincinnati, OHThe Cincinnati location has flexible manufacturing - capable of manufacturing a variety of products from rates of 40,000/month down to individual production units for development efforts, dual identical modern Surface Mount Technology (SMT) assembly lines for automated electronic manufacture, and on-site inspection and test capabilities to perform all required environmental conditioning test procedures. Headquartered in Cincinnati, Ohio, L3Harris FOS' primary manufacturing facility was specifically designed and constructed for the manufacture of fuzing and ordnance systems and precision electronic components.
Safety Engineer (Commercial Construction) Danis ConstructionSafety Engineer (Commercial Construction)Columbus, OhioFull timeSupport jobsite safety programs , helping project teams implement tailored safety plans from preconstruction through closeout. Since 1916, we’ve combined craftsmanship with forward-thinking innovation to exceed client expectations across healthcare, data centers, life sciences, industrial, and commercial markets.
Experienced Industrial Process Safety Engineer ADF EngineeringExperienced Industrial Process Safety EngineerDayton, OH$120,000–$125,000 / yearFull timeOur diverse team of engineers and designers, supported by a robust administrative staff, fosters a collaborative environment that encourages professional growth and camaraderie, essential for thriving in the competitive consulting engineering field. Preferred experience includes P&IDs, process design, ChemCAD/Aspen, combustible dust mitigation, and familiarity with industries such as agribusiness, pharmaceuticals, biofuels, and feed processing.
Safety Engineer (Commercial Construction) Danis Building Construction CoSafety Engineer (Commercial Construction)Columbus, OHSupport jobsite safety programs, helping project teams implement tailored safety plans from preconstruction through closeout. Since 1916, we've combined craftsmanship with forward-thinking innovation to exceed client expectations across healthcare, data centers, life sciences, industrial, and commercial markets.
Product Safety Engineer Copeland Controls SrlProduct Safety EngineerSidney, OHBest-in-class engineering, design and manufacturing combined with category-leading brands in compression, controls, software and monitoring solutions result in next-generation climate technology that is built for the needs of the world ahead. The Product Safety Engineer participates in identifying and mitigating product safety risks and works cross-functionally with Engineering, Quality, Manufacturing, Legal, and Compliance teams to embed safety into product design and execution.
NewProcess Safety Engineer ADF EngineeringProcess Safety EngineerDayton, OH$120,000–$125,000 / yearIS THIS THE PERFECT OPPORTUNITY FOR YOU?Bachelor's degree in chemical engineeringProfessional Engineer License (P.E.)5+ years of experience in Industrial Process Design & Safety4+ years of experience in industrial chemical process safety8+ years of total industry experiencePreferred experience includes P&IDs, process design, ChemCAD/Aspen, combustible dust mitigation, and familiarity with industries such as agribusiness, pharmaceuticals, biofuels, and feed processing. In a collaborative environment, our team members experience the professional camaraderie and mutual support it takes to keep up with the fast‑paced and highly competitive demands of consulting engineering.
Environmental Health and Safety Engineer Calgon Carbon CorpEnvironmental Health and Safety EngineerColumbus, OHThis role is responsible to assure that day-to-day Environmental compliance activities are carried out by plant personnel at Columbus and will assist in the development and implementation of safety programs and initiatives, including but not limited to Process Hazard Analysis, Combustible Dust, Contractor Safety, and Behavior-Based Safety. Implements programs to eliminate potential hazards in the workplace by working closely with Manufacturing Site Managers, Facilities Engineering, Research and Development and Site Safety Committees.
Safety Engineer Embark Recruiting SolutionsSafety EngineerColumbus, Ohioo Experience planning and implementing fall protection/prevention systems, rigging and hoisting, crane operations, underground utility damage prevention, environmental remediation, demolition, fire prevention, public protection, scaffolding, indoor air quality control, and mobile equipment, preferred. o Must be able to provide oversight and facilitate an event management process, including classification of potential event consequences, data collection, root cause analysis, correction action implementation, and sharing of lessons learned.
NewSenior Process Safety Engineer - PHA/HAZOP & Risk Lead CovestroSenior Process Safety Engineer - PHA/HAZOP & Risk LeadNewark, OHPerform, facilitate and document process safety reviews (PHAs, HAZOPs, MOCs, and PSSRs) for revalidations and capital projects at Covestro's Newark Compounding Facility, ensuring all findings are tracked to closureSupport project management and site leadership by identifying regulatory impacts and contributing technical input on process safety issues; assist in identifying when MOCs are required for changes to process, equipment or proceduresSupport efforts to ensure all PSM and Emergency Response System (ERS) programs meet local and global directed completion schedules; assist in identifying and escalating risks to schedule as needed. What You Offer Basic Qualifications:Bachelor's degree (BS) in Chemical Engineering, Process Engineering or equivalent engineering degree with a minimum of four (4) years of experience in process safety within the chemical or petroleum industries, orMaster's degree (MS) in Chemical Engineering, Process Engineering or equivalent engineering degree with a minimum of two (2) years of experience in process safety within the chemical or petroleum industries.
NewSenior Process Safety Engineer CovestroSenior Process Safety EngineerNewark, OHWHAT YOU OFFERBasic Qualifications:Bachelor's degree (BS) in Chemical Engineering, Process Engineering or equivalent engineering degree with a minimum of four (4) years of experience in process safety within the chemical or petroleum industries, orMaster's degree (MS) in Chemical Engineering, Process Engineering or equivalent engineering degree with a minimum of two (2) years of experience in process safety within the chemical or petroleum industries. Support efforts to ensure all PSM and Emergency Response System (ERS) programs meet local and global directed completion schedules; assist in identifying and escalating risks to schedule as needed.
Product Safety Engineer CopelandProduct Safety EngineerSidney, OhioBest-in-class engineering, design and manufacturing combined with category-leading brands in compression, controls, software and monitoring solutions result in next-generation climate technology that is built for the needs of the world ahead. . The Product Safety Engineer participates in identifying and mitigating product safety risks and works cross-functionally with Engineering, Quality, Manufacturing, Legal, and Compliance teams to embed safety into product design and execution.