NewLead Multi-Craft Maintenance Technician JobotLead Multi-Craft Maintenance TechnicianHartsville, TN$25–$38 / hourInformation 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 Maintenance Technician is responsible for performing a variety of highly diverse duties, including installing, troubleshooting, repairing, and maintaining production and facility equipment.
Maintenance Technician JobotMaintenance TechnicianMemphis, TN$30–$40 / hourInformation 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 role involves working with systems such as pneumatics, hydraulics, motors, pumps, gears, belts, pulleys, and three-phase electric systems.
3rd Shift Maintenance Technician OP Mobility3rd Shift Maintenance TechnicianSmyrna, TNToday, OPmobility develops technological solutions across four areas of expertise: exterior and lighting systems, the integration of complex modules, technologies related to energy storage, hydrogen and electrification, and a division dedicated to the development of embedded software and digital solutions. We are committed to building inclusive teams, promoting diversity and equality, and ensuring that every application is considered fairly - because the future of mobility is built by diverse perspectives, bold ideas, and people who dare to move forward.
TurnKey - Maintenance Staff SourceTurnKey - MaintenanceOak Ridge, TN$18–$20 / hourFull timeWe are looking for a reliable and skilled Maintenance Technician to perform turnkey maintenance and upkeep for residential apartment units in the Oak Ridge and Oliver Springs area. The ideal candidate takes pride in their work, is comfortable working independently, and can handle a variety of tasks to keep units move-in ready.
NewIndustrial Maintenance Technician JobotIndustrial Maintenance TechnicianStrawberry Plains, TN$30–$32 / hourInformation 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. Perform troubleshooting, inspections, and repairs on underground mobile equipment including loaders (LHDs), haul trucks, bolters, and utility vehicles.
Technician/Maintenance Elite StaffingTechnician/MaintenanceChattanooga, TNBy submitting your application, you authorize Elite Staffing, Inc. to contact you using the contact information you have provided for employment-related activities via any method, including SMS, email, and phone calls, including through the use of automated technology, AI generative voice, and pre-recorded and/or artificial voice messages. The technician will work closely with Maintenance Technicians, Production Operators, and Maintenance Planner to ensure equipment lubrication schedules are completed accurately and equipment defects are identified and reported promptly.
NewMaintenance Technician LSI StaffingMaintenance TechnicianGermantown, TN$30–$35 / hourWe are seeking an experienced Lead Maintenance Technician to oversee daily maintenance operations, lead a team of technicians, and ensure equipment and facility systems operate safely and efficiently. Must be able to diagnose and repair motors, motor controls, contactors, relays, and electrical control circuits.
NewMaintenance Technician - Willow Creek Dominium Management Services, LLCMaintenance Technician - Willow CreekLebanon, TNDominium’s values – EDGE: Entrepreneurial Innovation, Developing People, Growth Mindset and Execution – guide us in fulfilling our Purpose: to provide quality, affordable housing that builds Enduring Value for our residents, employees, communities and financial partners. We also provide a comprehensive benefits package for eligible employees, including Basic Life and AD&D; Employee, Spouse and Child Supplemental Life and AD&D; and Short and Long-Term Disability insurance.
Apartment Maintenance Technician Dominium Management Services, LLCApartment Maintenance TechnicianNashville, TNDominium’s values – EDGE: Entrepreneurial Innovation, Developing People, Growth Mindset and Execution – guide us in fulfilling our Purpose: to provide quality, affordable housing that builds Enduring Value for our residents, employees, communities and financial partners. We also provide a comprehensive benefits package for eligible employees, including Basic Life and AD&D; Employee, Spouse and Child Supplemental Life and AD&D; and Short and Long-Term Disability insurance.
Building Maintenance Technician Dominium Management Services, LLCBuilding Maintenance TechnicianOld Hickory, TNDominium’s values – EDGE: Entrepreneurial Innovation, Developing People, Growth Mindset and Execution – guide us in fulfilling our Purpose: to provide quality, affordable housing that builds Enduring Value for our residents, employees, communities and financial partners. We also provide a comprehensive benefits package for eligible employees, including Basic Life and AD&D; Employee, Spouse and Child Supplemental Life and AD&D; and Short and Long-Term Disability insurance.
Area Maintenance Technician Dominium Management Services, LLCArea Maintenance TechnicianNashville, TNDominium’s values – EDGE: Entrepreneurial Innovation, Developing People, Growth Mindset and Execution – guide us in fulfilling our Purpose: to provide quality, affordable housing that builds Enduring Value for our residents, employees, communities and financial partners. We also provide a comprehensive benefits package for eligible employees, including Basic Life and AD&D; Employee, Spouse and Child Supplemental Life and AD&D; and Short and Long-Term Disability insurance.
Residential Maintenance Technician Dominium Management Services, LLCResidential Maintenance TechnicianOld Hickory, TNDominium’s values – EDGE: Entrepreneurial Innovation, Developing People, Growth Mindset and Execution – guide us in fulfilling our Purpose: to provide quality, affordable housing that builds Enduring Value for our residents, employees, communities and financial partners. We also provide a comprehensive benefits package for eligible employees, including Basic Life and AD&D; Employee, Spouse and Child Supplemental Life and AD&D; and Short and Long-Term Disability insurance.
Maintenance Technician - Flats on Waters Edge Dominium Management Services, LLCMaintenance Technician - Flats on Waters EdgeNashville, TNDominium’s values – EDGE: Entrepreneurial Innovation, Developing People, Growth Mindset and Execution – guide us in fulfilling our Purpose: to provide quality, affordable housing that builds Enduring Value for our residents, employees, communities and financial partners. We also provide a comprehensive benefits package for eligible employees, including Basic Life and AD&D; Employee, Spouse and Child Supplemental Life and AD&D; and Short and Long-Term Disability insurance.
NewMaintenance Technician Mauser Packaging SolutionsMaintenance TechnicianMemphis, TNResponsibilities: Performs a variety of skilled duties involving in the inspection, diagnosis, troubleshooting, maintenance, repair and servicing of manufacturing, assembly, coating and processing equipment, facilities and machinery associated with the production, storage, and distribution of steel packaging products (i.e, motors, gearboxes, pneumatics, hydraulics, conveyance devices, tubes, rods, seals, shafts, stuffing boxes, gears, bearings, couplings, feed systems, painting, heating/baking/curing equipment, chilling/pump stations, valves, pumps from fractional to lO0hp (vertical turbine, submersible, split case horizontal, right angle, gears, etc.); tests and monitors equipment and machinery for vibration, bearing temperature and output capacity. Must demonstrate and apply principles, methods, techniques, tools and equipment used in the installation, maintenance and repair of industrial/mechanical equipment and machinery common to steel packaging component manufacturing, assembly and coating facilities; production / maintenance / machine shop procedures and practices.
26899 Automotive Service Technician - Chrysler Certified Steve Landers Chrysler Dodge Jeep Ram26899 Automotive Service Technician - Chrysler CertifiedMemphis, TNFull timeSteve Landers Chrysler Dodge Jeep in Little Rock is looking for Chrysler Certified Technicians to join their industry leading Service Team! Continuously learn new technical information and techniques in formal training sessions in order to stay in line with rapidly changing technology.
NewIndustrial Multi Craft Maintenance Technician A.O. SmithIndustrial Multi Craft Maintenance TechnicianFranklin, TN$28.79Respond to production work orders regarding troubleshoot, repair and maintain a wide variety of manufacturing & facility equipment which includes fabrication, mechanical, pneumatic, hydraulic, electrical, PLC and robotic processes. The Multi-Craft Maintenance Technician Shift F (Overnight Shift) will perform preventative, predictive, corrective, and emergency maintenance on industrial equipment with a strong emphasis on, but not limited to electrical controls and systems.
Maintenance Technician A.O. SmithMaintenance TechnicianFranklin, TNRespond to production work orders regarding troubleshoot, repair and maintain a wide variety of manufacturing & facility equipment which includes fabrication, mechanical, pneumatic, hydraulic, electrical, PLC and robotic processes. The Multi-Craft Maintenance Technician Shift C will perform preventative, predictive, corrective, and emergency maintenance on industrial equipment with a strong emphasis on, but not limited to electrical controls and systems.
NewMaintenance Technician (2nd Shift) Aladdin Temp RiteMaintenance Technician (2nd Shift)Hendersonville, TNTake advantage of this opportunity to join a recession-proof company with a noble purpose that makes essential products in the healthcare industry like food trays, insulated cups, bowls and mugs as well as disposable products and equipment that are used every day in hospitals around the US. Aladdin Temp-Rite is seeking career-minded professionals with experience in the maintenance of manufacturing process equipment to join their team as an Maintenance Technician in our Hendersonville, TN facility.
26995 Automotive Transmission Technician Shottenkirk Chrysler Dodge Jeep Ram26995 Automotive Transmission TechnicianChattanooga, TNFull timeAt Shottenkirk Chrysler Dodge Jeep Ram as an Automotive Transmission Technician you will quickly and efficiently perform routine maintenance and identify the cause of breakdowns and repair them using the most optimal solutions. Explain mechanical diagnoses and required repairs in a non-technical manner to service advisors and customers.
44010 Chrysler Certified Automotive Technician Martin Dodge Jeep Chrysler44010 Chrysler Certified Automotive TechnicianNashville, TNFull timeAutomotive technicians / auto techs diagnose and repair vehicle automotive systems including engine, transmission, electrical, steering, suspension, braking, air conditioning, etc. to specification. Auto techs / automotive technician explain mechanical diagnoses and required repairs in a non-technical manner to service advisors and customers.
26808 Automotive Service Technician Franklin Chrysler Dodge Jeep Ram26808 Automotive Service TechnicianHendersonville, TNFull timeDiagnose and repair vehicle automotive systems including engine, transmission, electrical, steering, suspension, braking, air conditioning, etc. to specification. Explain mechanical diagnoses and required repairs in a non-technical manner to service advisors and customers.
66908 Automotive Technician Gary Matthews Motors66908 Automotive TechnicianClarksville, TNFull timeGary Mathews Motors of Clarksville is looking for Automotive Mechanics / Auto Technicians to join their industry leading Service Team! Able to explain mechanical problems and needed repairs to Service Advisors and vehicle owners in a non-technical manner.
63283 Chrysler Certified Master Automotive Technician Stinnett Chrysler Dodge Jeep RAM63283 Chrysler Certified Master Automotive TechnicianKnoxville, TNFull timeConfer with customers or service advisors to obtain descriptions of vehicle problems, and to discuss work to be performed and future repair requirements. Diagnose, maintain, and repair vehicle automotive systems including engine, transmission, electrical, steering, suspension, braking, air conditioning, etc.
26808 Automotive Lube Technician Franklin Chrysler Dodge Jeep Ram26808 Automotive Lube TechnicianFranklin, TNFull timeEntry Level Automotive Technician/Express Lane Technician/Lube Technician Franklin Chrysler Dodge Jeep Ram is looking for Express Lane Lube Technicians to join their busy service department! Whether a recent technical school graduate or an experienced oil change master, Franklin CDJR offers a chance to kick-start your career in automotive repair!
26808 Automotive Diesel Technician Franklin Chrysler Dodge Jeep Ram26808 Automotive Diesel TechnicianFranklin, TNFull timeFranklin CDJR is the #1 volume Chrysler Dodge Jeep Ram dealer in Tennessee and they are always seeking qualified and enthusiastic individuals to join their team! The technician diagnoses, performs repairs and examines vehicle to determine if further repairs are needed/recommended.
60419 Automotive Technician Homer Skelton Chrysler Dodge Jeep of Millington60419 Automotive TechnicianCollierville, TNFull timeHomer Skelton Chrysler Dodge Jeep of Millington is looking for Automotive Technicians to join their industry leading Service Team! Continuously learn new technical information and techniques in formal training sessions in order to stay in line with rapidly changing technology.
NewMaintenance Technician United RentalsMaintenance TechnicianLa Vergne, TNWith supervision, the Fleet Technician I is responsible for the maintenance and repair of all Mobile Storage rental fleet equipment, including containers, ground level offices, office trailers, and/or modular buildings. The actual pay rate offered to candidates varies depending upon a wide range of factors including specific position, location, education, training, experience, skills, and ability.
66908 Entry Level Automotive Technician - Express Lube Tech Gary Matthews Motors66908 Entry Level Automotive Technician - Express Lube TechClarksville, TNFull timeWhether a recent technical school graduate or an experienced oil change master, Chrysler offer s a chance to kick-start your career in automotive repair! Gary Matthews Motors is looking for an Entry Level Tech | Lube Technician to join our busy service department!
26937 Entry Level Lube Technician Jason Lewis Chrysler Dodge Jeep Ram26937 Entry Level Lube TechnicianSparta, TNFull timeJason Lewis Chrysler Dodge Jeep Ram is looking for an Entry Level Tech | Lube Technician to join our busy service department! Whether a recent technical school graduate or an experienced oil change master, Chrysler offers a chance to kick-start your career in automotive repair!
26808 Chrysler Certified Automotive Technician Franklin Chrysler Dodge Jeep Ram26808 Chrysler Certified Automotive TechnicianFranklin, TNFull timeConfer with customers or service advisors to obtain descriptions of vehicle problems, and to discuss work to be performed and future repair requirements. Diagnose, maintain, and repair vehicle automotive systems including engine, transmission, electrical, steering, suspension, braking, air conditioning, etc.
Greenhouse Technician StefaniniGreenhouse TechnicianMemphis, TNTemporaryContractorOur presence is in countries like the Americas, Europe, Africa, and Asia, and more than 400 clients across a broad spectrum of markets, including financial services, manufacturing, telecommunications, chemical services, technology, public sector, and utilities. The incumbent will work inside/outside the greenhouse and headhouse to support the trait Introgression and initiatives by performing the following duties: Sampling genetically engineered plant tissue for DNA and Protein testing in search of desired traits.
Maintenance Technician Gables Search GroupMaintenance TechnicianSpring Hill, TNThe ideal candidate will have a strong background in both mechanical and electrical maintenance, experience working with PLC-controlled equipment, conveyor systems, and manufacturing execution systems (MES), and the ability to diagnose and resolve complex equipment issues in a fast-paced manufacturing environment. Troubleshoot and repair motors, contactors, relays, power supplies, fuses, VFDs (Variable Frequency Drives), PLC I/O cards, RF readers, and proximity sensors.
NewFT Maintenance Technician | Knoxville Metro Area KARM StoresFT Maintenance Technician | Knoxville Metro AreaKnoxville, TNComplete painting, light carpentry, flooring, and general facility repairs to keep stores safe and looking their best. Ability to lift up to 100 lbs., climb ladders, and work indoors and outdoors in all weather conditions.
NewEquipment Maintenance Technician (Nashville, TN) Lifting Gear Hire CorpEquipment Maintenance Technician (Nashville, TN)Nashville, TNDescription: Founded in 1990, LGH stands at the forefront of the hoisting and rigging equipment rental industry, providing rental equipment responsible for the installation, maintenance, and repair of everything from the bridges you drive on to the sports stadiums you visit. We have an immediate need for a mechanically inclined individual to join our team where you’ll play a crucial role in maintaining our top-notch rental equipment, guaranteeing its immediate availability for safe utilization.
NewAircraft Maintenance Station Manager Tank TigersAircraft Maintenance Station ManagerMemphis, TNThis position reports to the assigned Facility Manager or OCC Manager/Director and carries responsibility for directing technicians, maintaining continuity of work, confirming personnel qualifications and ensuring all maintenance records and customer documentation are completed properly. Because this role includes supervising and assisting individuals who may be unfamiliar with assigned fuel system maintenance tasks, the selected candidate must meet the qualification requirements established under 14 CFR Part 145.153 and Tank Tigers Repair Station Manual Section 4.6.9.
NewMaintenance Tech JobotMaintenance TechMorristown, TN$65,000–$75,000 / 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. For the past 40+ years, our client has grown from about 30 employees in one facility to almost 1,000 employees in 8 locations responsible for the design, manufacturing and shipping of over 2,500 products all over the world.
NewAvionics Technicians STS Technical ServicesAvionics TechniciansNashville, TN2 years actual and recent depot level aircraft avionics experience is required, (repair of electrical systems, flight control systems, instrumentation and wiring); proficiency with: interpretation of avionic/electrical wiring diagrams, wire identification, harness fabrication, cables, fittings, circuits and connectors. Duties & Responsibilities: Performs routine or special maintenance inspections to prevent failure of aircraft electrical and avionic systems and components; performs complete operational and functional checks on navigation, communication and flight control systems, including instrumentation and pilot static installations, etc.
NewMaintenance Technician Asset LivingMaintenance TechnicianHermitage, TN$23–$25 / hourin all directions, lifting and placing objects of 100+ lbs., communicate with others to exchange information, repeat motions that may include wrists, hands and/or fingers, operate machinery and power tools, operate motor vehicles and/or golf carts, assess the accuracy, neatness, and thoroughness of the work assigned, identify and inspect objects and areas, exposed to outdoor weather elements (wind, precipitation) including low and high temperatures and exposed to hazardous chemicals, and able to work overtime, weekends, night hours (on-call property emergencies). The employee is frequently required to ascend and descend ladders, stairs, ramps, step stools, etc., move self in different positions to accomplish tasks in various environments, including tight and confined spaces, traverse flat and uneven terrain, work in an overhead position and/or reaching, adjust or move objects of 100+ lbs.
NewMulti-Site Maintenance Technician Asset LivingMulti-Site Maintenance TechnicianKingsport, TN$16–$20 / hourin all directions, lifting and placing objects of 100+ lbs., communicate with others to exchange information, repeat motions that may include wrists, hands and/or fingers, operate machinery and power tools, operate motor vehicles and/or golf carts, assess the accuracy, neatness, and thoroughness of the work assigned, identify and inspect objects and areas, exposed to outdoor weather elements (wind, precipitation) including low and high temperatures and exposed to hazardous chemicals, and able to work overtime, weekends, night hours (on-call property emergencies). The employee is frequently required to ascend and descend ladders, stairs, ramps, step stools, etc., move self in different positions to accomplish tasks in various environments, including tight and confined spaces, traverse flat and uneven terrain, work in an overhead position and/or reaching, adjust or move objects of 100+ lbs.
NewBilingual Maintenance Technician Asset LivingBilingual Maintenance TechnicianNashville, TN$25–$28 / hourin all directions, lifting and placing objects of 100+ lbs., communicate with others to exchange information, repeat motions that may include wrists, hands and/or fingers, operate machinery and power tools, operate motor vehicles and/or golf carts, assess the accuracy, neatness, and thoroughness of the work assigned, identify and inspect objects and areas, exposed to outdoor weather elements (wind, precipitation) including low and high temperatures and exposed to hazardous chemicals, and able to work overtime, weekends, night hours (on-call property emergencies). The employee is frequently required to ascend and descend ladders, stairs, ramps, step stools, etc., move self in different positions to accomplish tasks in various environments, including tight and confined spaces, traverse flat and uneven terrain, work in an overhead position and/or reaching, adjust or move objects of 100+ lbs.
Electro-Mechanical Technicians - Multiple Roles JobotElectro-Mechanical Technicians - Multiple RolesVonore, TN$30–$40 / hourInformation 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. Performing preventive maintenance on a wide range of electro-mechanical systems, including PLC, CNC, automation, robotics, and 24V three phase control wiring systems.
Fixed Maintenance JobotFixed MaintenanceStrawberry Plains, TN$40–$45 / hourInformation 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. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Jobot, and/or its agents and contracted partners.
NewDiesel Technician I Kenan Advantage GroupDiesel Technician IShelbyville, TN$19–$36 / hourWith expert knowledge, supportive leadership, and a strong belief in our company culture, our team exemplifies the passion, pride, and entrepreneurial spirit that help us reach our goals every day. Diesel Mechanics are required to safely and accurately perform general property and vehicle maintenance & repair duties in and around the shop operations in a fast-paced environment.
NewA&P Technicians STS Technical ServicesA&P TechniciansNashville, TNSeveral years or actual and recent depot level aircraft maintenance and repair experience is required, (repair of mechanical systems, components, hydraulics, pneumatics, plumbing, rigging etc.); proficiency with interpretation of original equipment manufacturer’s technical data or work package instructions; experience using power or pneumatic hand tools. Job Description: Examines, repairs, assembles, and tests aircraft accessories, such as engines, power brake units, auxiliary electric motors, carburetors, spark igniters, valves, pumps, fuselage, wings, and oil and fuel tanks, using hand tools and testing devices, and following shop orders and manufacturer’s specifications.
Auto Technician / Mechanic CarmaxAuto Technician / MechanicManchester, TN$26–$33.50Where required by State/Local law, maintain ASE Certifications in Steering and Suspension (A4), Brakes (A5), Heating Air Conditioning (A7), Electrical (A6), Engine Repair (A1), Manual Drive Train and Axles (A3), Engine Performance (A8), and Automatic Transmission/Transaxle (A2). Associates considered full-time salaried are entitled to paid time away with no specified limit as needed for sick, vacation, bereavement, jury duty, holidays, floating holiday, etc.
NewMaintenance Technician Gallery ResidentialMaintenance TechnicianNashville, TNCompletes the “make-ready” process to prepare vacant apartment homes for leasing and new move-ins by completing the pre-move-out inspection, creating a “punch” list of maintenance work needed, scheduling vendors and contractors as needed, obtaining needed supplies and materials, completing all maintenance tasks, and inspecting completed work. Demonstrates customer services skills by treating residents and others with respect, interfacing face-to-face with residents and service team, answering resident questions, responding sensitively to complaints about maintenance services, and completing assigned work orders with efficiency and urgency.
NewAircraft Structures Technicians STS Technical ServicesAircraft Structures TechniciansNashville, TNProven aircraft structures repair experience with the ability to use technical data and aircraft drawings to accomplish repairs. Perform serviceability tests on repairs using test equipment outlined in technical manuals.
NewPharmacy Technician Manager Methodist Le Bonheur HealthcarePharmacy Technician ManagerGermantown, TNEstablishes relationships with key internal and external customers and service providers.• Investigates and coordinates resolution of service delivery problems or conflicts; formulates plans for resolution, follows-up to ensure effective resolution, and determines level of satisfaction.• Working at MLH means carrying the mission forward of caring for our community and impacting the lives of patients in every way through compassion, a deliberate focus on service expectations and a consistent thriving for excellence.
NewBAS/HVAC Controls Technician JobotBAS/HVAC Controls Techniciannashville, TN$75,000–$95,000 / 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. We are a regional technical services firm that specializes in implementing integrated building control platforms that manage systems such as HVAC, lighting, access, and other facility infrastructure.
Avionics Installation Technician Johnson Service GroupAvionics Installation TechnicianSmyrna, TNThe Avionics Installer, under minimal supervision, removes and installs avionics equipment and electrical components, fabricates wire harnesses and terminations, troubleshoots installations, and completes functional testing of avionics and electrical systems. Ability to wire, install, test, and verify operation of avionics equipment and accessories; identify and correct electronics failures in various airframes using hand tools, test equipment, technical documents, and technical reference materials.