Premier Mechanical IncHVAC Service Technician Premier Mechanical IncHVAC Service TechnicianAddison, ILPosition Summary: The HVAC Service Technician is responsible for the installation, maintenance, inspection, and repair of heating, ventilation, and air conditioning systems and equipment. This position supports equipment throughout its full service lifecycle, including startup, preventive maintenance, warranty service, troubleshooting, and emergency repair.
MarvinHVAC Technician - Located in Warroad, MN MarvinHVAC Technician - Located in Warroad, MNChicago, IL$24.50–$32With operations in 19 cities across North America, we manufacture Marvin’s quality products, including Infinity Replacement Windows and Doors, and TruStile Doors. Marvin offers an extensive relocation benefit package that includes the movement of your household goods, temporary housing, and much more – in addition to a relocation counselor to assist you throughout the entire journey.
JobotNewAccount Manager (HVAC Contractor) JobotAccount Manager (HVAC Contractor)Hillside, IL$100,000–$150,000 / 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. From design-build installations to ongoing maintenance and emergency support, we deliver comprehensive services that help our clients optimize comfort, efficiency, and long-term value.
CoolSysHVAC/R Install Technician - Light Commercial CoolSysHVAC/R Install Technician - Light CommercialNorth Chicago, IL$25–$45Responsibilities: The HVAC/R Installer role is primarily responsible for isntalling a variety of HVAC and Refrigeration equipment including air conditioning, electric motors, heating units, heat pumps, hermetic compressors, commercial furnaces, boilers, burners, intake and exhaust fans, economizers and humidifiers, RTUs, remote condensing units, ice machines, walk-in coolers & freezers, and upright refrigerators & freezers. Sr, senior, Service Tech, refridgeration, HVAC, refrigeration, HVAC-R, HVAC/R, diagnostic, commercial, service, install, mechanical, mechanic, apprentice, AC, field service, chiller, specialist, HVACR, supermarket, rack systems.
*US AMR-Jones Lang LaSalle Americas, Inc.NewMobile HVAC/R Engineer *US AMR-Jones Lang LaSalle Americas, Inc.Mobile HVAC/R EngineerBolingbrook, ILRemoteIndividuals are expected to demonstrate technical expertise in HVAC and refrigeration and be multi skilled in electrical, HVAC, Piping/Plumbing, Material Handling Equipment and others in order to successfully complete daily/weekly work assignments. Maintain, operate, and repair all HVAC/R systems and associated equipment, electrical distribution equipment, plumbing systems, building interior/exterior repair, and related grounds, and production equipment as it pertains to assigned buildings. .
CoolSysHVAC Service Tech 3 - Refrigeration CoolSysHVAC Service Tech 3 - RefrigerationOak Lawn, IL$25–$50Responsibilities: The HVAC/R Technician role is primarily responsible for performing repairs and maintenance to a variety of HVAC and Refrigeration equipment including air conditioning, electric motors, heating units, heat pumps, hermetic compressors, commercial furnaces, boilers, burners, intake and exhaust fans, economizers and humidifiers, RTUs, remote condensing units, ice machines, walk-in coolers & freezers, and upright refrigerators & freezers. Sr, senior, Service Tech, refridgeration, HVAC, refrigeration, HVAC-R, HVAC/R, diagnostic, commercial, service, install, mechanical, mechanic, apprentice, AC, field service, chiller, specialist, HVACR, supermarket, rack systems.
JobotNewLead Mechanical Engineer HVAC JobotLead Mechanical Engineer HVACChicago, ILRemote$110,000–$170,000 / yearWe are a growing, design-build mechanical contractor with a strong reputation across the Upper Midwest, delivering HVAC, plumbing, and process piping solutions across healthcare, higher education, industrial, commercial, multifamily, and hospitality environments. 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.
JobotNewSenior Mechanical Engineer (Construction/HVAC) JobotSenior Mechanical Engineer (Construction/HVAC)Downers Grove, IL$95,000–$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. As a key member of our team, you will play a pivotal role in the design and management of various projects, ensuring the highest levels of quality and efficiency.
CoolSysNewHVAC Service Tech 4 - Refrigeration CoolSysHVAC Service Tech 4 - RefrigerationKenilworth, IL$25–$50Responsibilities: The HVAC/R Technician role is primarily responsible for performing repairs and maintenance to a variety of HVAC and Refrigeration equipment including air conditioning, electric motors, heating units, heat pumps, hermetic compressors, commercial furnaces, boilers, burners, intake and exhaust fans, economizers and humidifiers, RTUs, remote condensing units, ice machines, walk-in coolers & freezers, and upright refrigerators & freezers. Sr, senior, Service Tech, refridgeration, HVAC, refrigeration, HVAC-R, HVAC/R, diagnostic, commercial, service, install, mechanical, mechanic, apprentice, AC, field service, chiller, specialist, HVACR, supermarket, rack systems.
CoolSysNewHVAC/R Branch Manager - Light Commercial CoolSysHVAC/R Branch Manager - Light CommercialCarol Stream, IL$95,000–$130,000Service Tech, refridgeration, HVAC, refrigeration, HVAC-R, HVAC/R, diagnostic, commercial, service, install, mechanical, mechanic, apprentice, AC, field service, chiller, mgr, lead, supervisor, leader, regional, HVACR, supermarket, rack systems. Maintains communication with vendors and factory personnel concerning warranty issues, product recall notices, operational problems with products, premature failures, and other issues.
JobotNewMaintenance Technician JobotMaintenance TechnicianDowners Grove, IL$30–$35 / 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. They deliver tailored, hard services-led facility management solutions — self-performing critical maintenance while partnering with best-in-class providers to serve their clients.
JobotNewBAS Service Technician - Delta Controls JobotBAS Service Technician - Delta ControlsChicago, IL$35–$50 / 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. About the Role: We are seeking a skilled and motivated Building Automation Service Technician to support service, maintenance, troubleshooting, and commissioning of building automation systems across commercial and mission-critical facilities in the Chicago Metro area.
Summit School ServicesElk Grove Village Maintenance Technician II Summit School ServicesElk Grove Village Maintenance Technician IIWheeling, ILYou’ll work across yellow-bus systems—preventive maintenance, air and hydraulic braking, steering/suspension, electrical/charging, HVAC, drivetrains/transmissions, and DVIR/state inspection readiness—balancing quality repairs with uptime so routes leave on time. • Diagnose and repair automotive and diesel systems — including brakes, steering, suspension, drivetrains, electrical, cooling, and fuel systems — according to skill level.
Summit School ServicesNewMaintenance Technician I Summit School ServicesMaintenance Technician IAurora, ILYou’ll work across yellow-bus systems—preventive maintenance, DOT/state inspections and DVIR readiness, air/hydraulic braking, steering/suspension, electrical/charging, HVAC, drivetrains/transmissions, and engine performance—while modeling craftsmanship, safety, and uptime. As a Fleet Technician I supporting our school bus fleet, you’ll handle advanced diagnostics, inspections, and repairs on Summits Fleet of vehicles so routes leave safe and on time.
Summit School ServicesDiesel Mechanic Technician II Summit School ServicesDiesel Mechanic Technician IIAurora, ILYou’ll work across yellow-bus systems—preventive maintenance, air and hydraulic braking, steering/suspension, electrical/charging, HVAC, drivetrains/transmissions, and DVIR/state inspection readiness—balancing quality repairs with uptime so routes leave on time. • Diagnose and repair automotive and diesel systems — including brakes, steering, suspension, drivetrains, electrical, cooling, and fuel systems — according to skill level.
Medline IndustriesMaintenance Tech I Medline IndustriesMaintenance Tech IMundelein, IL$28.75–$41.75 / hourFull timeTasks include, but are not limited to, light bulb/ballast replacement, door repairs, furniture installation, ceiling tile replacement, carpentry duties, plumbing repairs and maintaining operation logs. Follow appropriate safety procedures such as Lock Out/Tag Out, Arc Flash, etc. and use Personal Protective Equipment (PPE) while maintaining equipment, and ensure a safe work environment by eliminating potential equipment safety hazards.
Aspire ChicagoNewSenior Maintenance Technician Aspire ChicagoSenior Maintenance TechnicianWaukegan, IL$26–$26.44 / hourPlumbing- perform routine plumbing repairs such as: replace/repair/service water heaters, clear drainlines, and replace broken pipes, worn out washers- gaskets and or faucets and floats. Other unskilled tasks such as: interior and exterior painting, floor tile installation and repair, interior cleaning, tree/shrub trimming, debris removal.
Swissport International AGNewHQA Regional Training and Service Technician, Fleet - ORD Swissport International AGHQA Regional Training and Service Technician, Fleet - ORDChicago, IL$93,600–$93,600This individual will travel frequently to support local maintenance teams, perform diagnostics and repairs, ensure fleet reliability, and train local technicians in best practices and new technologies. Lead hands-on training in diagnosing, servicing, and maintaining gas, diesel, electric, and hydraulic-powered GSE, including loaders, pushbacks, belt loaders, GPU/ASU units, and deicers.
BHService Technician (60873) BHService Technician (60873)Gurnee, IL$25–$27Today, BH manages over 100,000 units, employs over 2,800 people, owns its processes in-house, and is praised by Fortune Magazine as the “Best Workplace for Women,” “Best Workplace for Millennials,” and “Best Workplaces for Diversity.” Assists with the identification and correction of hazardous community conditions and liabilities and reports hazards to Community Manager and Service Manager.
BHService Technician (60439) BHService Technician (60439)West Dundee, IL$24–$25Today, BH manages over 100,000 units, employs over 2,800 people, owns its processes in-house, and is praised by Fortune Magazine as the “Best Workplace for Women,” “Best Workplace for Millennials,” and “Best Workplaces for Diversity.” We foster the diverse voices of our community by advocating for inclusivity, celebrating our differences, and continually evolving our practice to make BH a better place to work and live.
BHService Technician (61559) BHService Technician (61559)Arlington Heights, IL$25–$26Today, BH manages over 100,000 units, employs over 2,800 people, owns its processes in-house, and is praised by Fortune Magazine as the “Best Workplace for Women,” “Best Workplace for Millennials,” and “Best Workplaces for Diversity.” We foster the diverse voices of our community by advocating for inclusivity, celebrating our differences, and continually evolving our practice to make BH a better place to work and live.
*US AMR-Jones Lang LaSalle Americas, Inc.NewOperating Engineer *US AMR-Jones Lang LaSalle Americas, Inc.Operating EngineerOakbrook Terrace, IL$103,000–$103,000Whether you’ve got deep experience in commercial real estate, skilled trades or technology, or you’re looking to apply your relevant experience to a new industry, join our team as we help shape a brighter way forward. What this job involves: As a 2nd Shift Operating Engineer at JLL, you will play a critical role in maintaining and optimizing the mechanical, electrical, and plumbing systems across multiple client facilities in Northern Illinois.
NorthPoint Development LLCNewBuilding Maintenance Engineer NorthPoint Development LLCBuilding Maintenance EngineerDowners Grove, ILMaintain thorough knowledge of pertinent laws and EPA and OSHA regulations governing property storage and management of hazardous materials, including solvents, flammables, caustics, and refrigerants. Troubleshoot and repair electrical, plumbing, HVAC, drywall, painting, fire sprinkler systems, building controls, doors, windows, caulking and any other property issue.
Uline, Inc.NewMaintenance Technician Uline, Inc.Maintenance TechnicianGurnee, ILPrivacy Policy at https://www.uline.jobs/Privacy-Policy? and SonicJobs Privacy Policy at https://www.sonicjobs.com/us/privacy-policy and Terms of Use at https://www.sonicjobs.com/us/terms-conditions. Uline, a family-owned company, is North America’s leading distributor of shipping, industrial, and packaging materials with over 9,000 employees across 14 locations.
Six Flags Great America & Hurricane HarborNewKitchen Repair Technician- Full-Time-$24/HR Six Flags Great America & Hurricane HarborKitchen Repair Technician- Full-Time-$24/HRGurnee, ILOverview:Safely maintain, repair and rehab equipment in multiple areas within the Maintenance Division; Plumbing, Kitchen Equipment Repair, HVAC/R, Aquatic Systems & Water Quality. Should possess practical skills and willingness to learn in all of the respective areas; Plumbing, HVAC/R, Aquatic Systems, and Water Quality.
United AirlinesNewFacilities Maintenance Technician- Building Engineer United AirlinesFacilities Maintenance Technician- Building EngineerChicago, ILOur Technical Operations team is full of aircraft maintenance technicians, engineers, planners, ground equipment and facilities professionals, and supply chain teams that help make sure they’re well taken care of and ready to get our customers to their desired destinations. Key Responsibilities: Requires a thorough knowledge of general building maintenance with emphasis on electrical solving, including AC & DC circuits, high voltage (480), high amperage and some 400 cycle equipment.
*US AMR-Jones Lang LaSalle Americas, Inc.NewSpecialist, Engineering Services *US AMR-Jones Lang LaSalle Americas, Inc.Specialist, Engineering ServicesChicago, IL$73,000–$85,000From managing work orders and performing preventive maintenance to coordinating with vendors and handling asset recovery, your technical expertise and proactive approach will keep operations running seamlessly while delivering exceptional service to our clients. Whether you’ve got deep experience in commercial real estate, skilled trades or technology, or you’re looking to apply your relevant experience to a new industry, join our team as we help shape a brighter way forward.
Sherwin-WilliamsNewMaintenance Mechanic Sherwin-WilliamsMaintenance MechanicWheeling, IL$40.89–$40.89Equipment may include: dryers, chillers, thermal oxidizer, HVAC, fire pump, mixers, mills, filling line equipment, conveyors, wrappers, tanks, motors, pumps, tank washers, tank tipper, as well as dock and building maintenance, etc. The wage range listed for this role takes into account the wide range of factors considered in making compensation decisions including skill sets; experience and training; licensure and certifications; and other business and organizational needs.
Assurance Heating & Air Conditioning,NewHVAC Installer / Service Technician Assurance Heating & Air Conditioning,HVAC Installer / Service TechnicianChicago, IL$30–$50 / hourCompany smart phone* Company uniforms for all seasons* Ongoing training and education* Advancement opportunitiesApplicants must have the following:* Minimum 3 years' experience.* Experience with furnaces, boilers, humidifiers, air conditioners, mini-splits, and rooftop units.* Company DescriptionAt Assurance Heating & Air Conditioning, we've been working with customers since 1981 and know that there are certain things you want and expect from a reputable heating and air conditioning company.
Blue Collar ServicesCommercial HVAC Technician/Install Blue Collar ServicesCommercial HVAC Technician/InstallChicago, IL$30–$45 / hourAs a technician you will be performing installations, service, maintenance, and troubleshooting of a wide range of commercial HVAC equipment, ensuring high-quality work on every job. 7-10 years HVAC with 3-4 years actual hands-on commercial HVAC experience, including extensive work with chillers, boilers, RTUs, and related systems.
Tradesmen International, Inc.HVAC Technician/Installer Tradesmen International, Inc.HVAC Technician/InstallerELGIN, Illinois$30–$45 / hourIf you are an HVAC Technician/Installer and want to work alongside other proven Craftsmen who emphasize safety, productivity and superior workmanship, this is your chance to advance your career! Description: Tradesmen International is immediately hiring experienced HVAC Technicians/Installers for projects located in the Elgin, IL area.
Energy ServHVAC Install Technician Energy ServHVAC Install TechnicianNaperville, IllinoisFor nearly 50 years, Energy Services has been a trusted name in residential plumbing and home comfort—known for quality work, professionalism, and long‑term careers. Proficiency in installing, troubleshooting, and maintaining HVAC systems (air conditioners, furnaces, heat pumps, and ductwork).
ARS-Rescue RooterNewHVAC Installer Lead ARS-Rescue RooterHVAC Installer LeadLincolnshire, ILWith 7,000+ team members and 45+ years of industry experience, ARS delivers stability, growth, and industry-leading support for HVAC professionals. Earn over $120,000 per yearbased on performance while working for the nation's largest provider of residential HVAC, plumbing, and electrical services.
American Residential Services LLCHVAC Installer Lead American Residential Services LLCHVAC Installer LeadBuffalo Grove, ILWith 7,000+ team members and 45+ years of industry experience, ARS delivers stability, growth, and industry-leading support for HVAC professionals. Earn over $120,000 per year based on performance while working for the nation's largest provider of residential HVAC, plumbing, and electrical services.
Green Air Care Group LLCHVAC LEAD Installer Green Air Care Group LLCHVAC LEAD InstallerBuffalo Grove, IL$60,000–$100,000 / yearPart timeAs a full-time HVAC Installer at Green Air Care, YOU will receive the following and so much MORE: · $60,000 - $100,000+ in Competitive Pay Per Year. · Installs performed include, but are not limited to air furnaces, air conditioners, duct distribution systems, piping, and electrical.
J&R HerraHVAC Technician J&R HerraHVAC TechnicianGeneva, IL$40–$50 / hourOnce the customer approves the work, you execute top-quality repairs and services such as recharging refrigerant levels, checking leaks, and rigorously testing systems. As an HVAC Technician, you visit our customers' homes to inspect their heating and cooling equipment, troubleshoot issues, and make quality repairs.
Precision TodayHVAC Maintenance Technician Precision TodayHVAC Maintenance TechnicianFranklin Park, Illinois
One Hour Heating & Air Conditioning Franchising SPE LLCResidential HVAC Installer One Hour Heating & Air Conditioning Franchising SPE LLCResidential HVAC Installernaperville, IL$25–$35 / hourJOB DUTIESCompletes installations in a neat timely and accurate manner that reflects all tasks performed on the installationProvides the best installations for the clients new HVAC systemsMINIMUM REQUIREMENTSHigh school diploma or equivalentMust have prior successful experience as an Installation Technician in the HVAC industryMust display strong communication skills and technical competenceAbility to pass a thorough background check and drug screenClean driving record Compensation 25.00 - 35.00 per hour Join the One Hour TeamWe want to make joining our team as easy as possible. Our training programs include Technical Training Virtual technical training communications sales and more If you are serious about your career and want to learn from the best in the industry apply todaySo if you have a great attitude and a strong workethicand are someone who takes pride in the work you do then we want to hear from youEach franchise location is independently owned and operated by a franchisee.
Signature Heating & CoolingHVAC Service Technician Signature Heating & CoolingHVAC Service TechnicianGurnee, Illinois$60,000–$100,000We’re looking for a dedicated professional with a minimum of 3 years of hands-on experience in "Diagnostic, repair, maintenance and installation of heating and air conditioning systems. Must be able carry and set up ladders and climb on roofs to work on light commercial hvac rooftop units.
ARS-Rescue RooterHVAC Lead Installer ARS-Rescue RooterHVAC Lead InstallerBuffalo Grove, IllinoisWith 7,000+ team members and 45+ years of industry experience, ARS delivers stability, growth, and industry-leading support for HVAC professionals. Earn over $120,000 per year based on performance while working for the nation’s largest provider of residential HVAC, plumbing, and electrical services.
American Residential Services LLCHVAC Lead Installer American Residential Services LLCHVAC Lead InstallerBuffalo Grove, ILWith 7,000+ team members and 45+ years of industry experience, ARS delivers stability, growth, and industry-leading support for HVAC professionals. Earn over $120,000 per year based on performance while working for the nation's largest provider of residential HVAC, plumbing, and electrical services.
Precision TodayWeekend HVAC Lead Install Technician Precision TodayWeekend HVAC Lead Install TechnicianFranklin Park, Illinois
Pearce ServicesNewHVAC Technician Pearce ServicesHVAC TechnicianChicago, IL$30–$38 / hourPearce provides technical maintenance, repair, operations, and engineering services for uninterruptible power supply (UPS) systems, backup power generators, battery energy storage systems (BESS), critical cooling systems, and other electrical and mechanical infrastructure across end markets such as renewable energy, telecom, and data centers. Founded in 1998, Pearce has more than 4,000 employees and 28 locations across the U.S. Pearce is a wholly owned subsidiary of CBRE Group, Inc., the world's largest commercial real estate services and investment firm.
American Mechanical SystemsNewHVAC Technician American Mechanical SystemsHVAC TechnicianNaperville, ILResponsibilities:* Repair or service heating, ventilating, and air conditioning (HVAC) systems to improve efficiency, such as by changing filters, cleaning ducts, or refilling non-toxic refrigerants* Establish customer rapport to ensure the highest levels of satisfaction* Test pipe or tubing joints or connections for leaks, using a pressure gauge or soap-and-water solution* Test electrical circuits or components for continuity, using electrical test equipment* Repair or replace defective equipment, components, or wiringQualifications:* Past experience as an HVAC service technician or comparable education* Valid Drivers License* EPA Certification* Experience with operation and maintenance of chillers, heat pumps, air handlers, and geothermal systems* Ability to climb ladders, crawl, and lift 40 pounds. In this role, you will install, service, or repair heating and air conditioning systems in residences or commercial establishments.
Precision HVAC Services Inc.Commercial HVAC Technician Precision HVAC Services Inc.Commercial HVAC TechnicianSkokie, Il$30–$55 / hourExtra Perks: employee outings, supportive and fun working environment, and co-workers, great work-life balance with our respectful and understanding management, making sure that whether your kid has a soccer game or you have date night, we will work with you to respect your schedule. Since 1979, Precision HVAC Services has proudly served throughout Chicagoland and surrounding suburbs with the highest level of expertise and integrity.
Blue Collar ServicesLead Commercial HVAC Technician Blue Collar ServicesLead Commercial HVAC TechnicianChicago, IL$40–$55 / hourThe Lead Technician will take ownership of installation, service, maintenance, and troubleshooting of a wide range of commercial HVAC equipment, while also mentoring junior team members and ensuring high-quality work on every job. Install, service, and maintain commercial HVAC systems, including chillers, boilers, RTUs, split systems, and control systems.
ComforTempNewHVAC Service Technician ComforTempHVAC Service TechnicianWillowbrook, IL$35–$50 / hourExperience servicing and installing furnaces, air conditioners, heat pumps, split systems, RTUs, walk-in coolers, reach-in coolers, freezers, chillers, and make-up air units. Strong customer service and communication skills with the ability to clearly explain issues and solutions to customers and coworkers.
WalmartSupermarket Rack Refrigeration Hvac Technician WalmartSupermarket Rack Refrigeration Hvac TechnicianRomeoville, ILFull timeAs a Supermarket Rack Refrigeration HVAC Technician at our local retail store, your role will support and oversee repair within the Walmart facilities Refrigeration HVAC equipment team and assets by utilizing commercial HVAC and Refrigeration skills and using hand tools, digital tools, power tools, and other equipment to complete jobs. Maintain and repair Walmart facility's Refrigeration HVAC equipment and assets by utilizing commercial HVAC and Refrigeration skills and using hand tools, digital tools, power tools, and other equipment to complete jobs.
Carrier CorporationCommercial HVAC Chiller Technician - Union Carrier CorporationCommercial HVAC Chiller Technician - UnionWillowbrook, IL$38–$76 / hourTo learn more about our benefits offering, please click here: Work With Us | Carrier Corporate The specific benefits available to any employee may vary depending on state and local laws and eligibility factors, such as date of hire and the applicability of collective bargaining agreements. Time Off and Leave: Paid vacation days, up to 15 days; paid sick days, up to 5 days; paid personal leave, up to 5 days; paid holidays, up to 13 days; birth and adoption leave; parental leave; family and medical leave; bereavement leave; jury duty; military leave; purchased vacation.
American Mechanical Systems IncHVAC Technician American Mechanical Systems IncHVAC TechnicianNaperville, ILRepair or service heating, ventilating, and air conditioning (HVAC) systems to improve efficiency, such as by changing filters, cleaning ducts, or refilling non-toxic refrigerants. In this role, you will install, service, or repair heating and air conditioning systems in residences or commercial establishments.