Are you looking for a reputable, stable company with supportive management who will value what you bring to the organization? If you are a self-motivated individual with great work ethic, then we would love to get to know you!

About GSM Services

GSM Services is a 4th-generation family-owned business, proudly serving the Greater Charlotte area for nearly 100 years. We’ll celebrate our centennial in 2027, a testament to our stability and commitment to excellence. Our focus is on commercial roofing and air conditioning services within a 50-mile radius of Charlotte, NC, and the majority of our projects are negotiated with repeat customers who trust us for quality and reliability.

The great people we add to our team enjoy a fun, friendly workplace where we provide training and benefits to allow us to keep them for years. Our high standards and uncompromising commitment to customer satisfaction has made GSM Services a success and a great place to work. We are always looking for qualified individuals who are willing to provide the highest quality of work possible. GSM Services wants to be the best place to work in our region and it takes teamwork to come together, work together and succeed together.

Are you the technician everyone trusts to make it work right the first time? Do you thrive on precision, problem-solving, and seeing a project successfully cross the finish line? If so, we’re looking for a Commercial HVAC Start-Up & Test Mechanic Replacement to play a critical role in commissioning high-profile commercial projects.

This position is more than start-up—it’s about ownership, expertise, and delivering confidence to customers when systems go live.

As a key player in our commercial operations, you will:

• Perform start-up, testing, adjustment, and commissioning of commercial HVAC systems including RTUs, split systems, VRF/VRV, air handlers, VAV systems, pumps, and controls
• Verify installations prior to start-up and identify deficiencies or punch list items
• Test system performance and coordinate balancing activities
• Configure, calibrate, and validate controls, sensors, safeties, and sequences of operation
• Document start-up data, test results, and equipment settings with precision
• Collaborate with Project Managers, Superintendents, Controls Technicians, and Field Mechanics to resolve issues efficiently
• Coordinate with equipment manufacturers and factory representatives when required
• Ensure compliance with mechanical codes, manufacturer requirements, and company standards
• Troubleshoot system issues during commissioning and support resolution
• Assist with customer training and system turnover documentation
• Maintain a clean, safe, and professional jobsite environment

• Strong knowledge of commercial HVAC systems and components
• Ability to read and interpret mechanical plans, specifications, wiring diagrams, and control schematics
• Proficiency with testing instruments, gauges, meters, and diagnostic tools
• Working knowledge of HVAC controls and BAS systems
• Excellent troubleshooting, time management, and problem-solving skills
• High attention to detail with accurate documentation habits
• Professional communication skills and the ability to work independently

• 5+ years of commercial HVAC field experience (start-up/commissioning preferred)
• Technical school, apprenticeship, or equivalent hands-on experience
• Valid driver’s license with an acceptable driving record

• EPA Universal Certification
• OSHA 10
• Manufacturer start-up or commissioning certifications (Trane, Carrier, Daikin, etc.)
• Controls or commissioning certifications a plus

• Ability to lift up to 50 lbs.
• Comfortable working on rooftops, ladders, and in confined spaces
• Ability to stand, walk, kneel, and work in varying weather conditions

Benefits & Perks

At GSM Services, we believe in taking great care of our team—on and off the job. Our coworkers enjoy a comprehensive benefits package designed to support your health, growth, and overall quality of life, including:

• Paid Time Off (PTO) to recharge and enjoy life outside of work
• Paid Holidays throughout the year
• Health Insurance with quality coverage options
• Dental and Vision Insurance
• 401(k) Retirement Plan with company support
• Profit Sharing Program—your contribution helps us grow, and you share in the success
• Life Insurance paid by the company
• Short-Term Disability Coverage
• Company Vehicle (role-dependent)
• Branded Uniforms provided at no cost
• Company-Paid Training & Professional Development
• Tuition Reimbursement to support continued education
• Apprenticeship Opportunities for skill-building and career progression
• Recruitment Incentive Bonus Program
• Gym Membership Program
• Health & Wellness Program
• A Supportive, People-First Workplace Culture