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Global Service Titan (GST) is a licensed mechanical contractor that has extensive knowledge and experience in the installation, startup, commissioning, troubleshooting, maintenance, repair and rebuild of HVAC systems and equipment. Our mission is to consistently deliver practical and measurable solutions to our customers by providing highly qualified professionals and excellent customer service.

What sets GST apart from the competition?

  • Commitment: We develop relationships that make a positive difference in our clients' mission.
  • Quality: We provide unsurpassed service that delivers premium value to our clients.
  • Integrity: We uphold the highest standards of integrity in all of our actions. We do the right thing. Period.
  • Teamwork: We work together across boundaries to meet the needs of our clients.
  • Respect for People: We value our people, encourage their development and reward their performance.
  • Personal Accountability: We are personally accountable for delivering on our commitments.
  • Certified HVAC Technician(s) with Active Government Security Clearance.

Our technical experts and business professionals analyze, design, and implement solutions in the areas of Installations, Startups, Commissioning, Service & Repair, and Equipment Upgrade & Rebuild.

  • Installations – GST is the right team for your commercial and industrial HVAC installation and replacement. We work hand-in-hand with the manufacturer(s) on all aspects of your custom solution, from design to equipment selection and system installation and replacement. We tailor each solution to the specific operating conditions of your facility and mission.
  • Startup – GST verifies proper installation of equipment per the design intent and sequence of operations. We ensure that the facility owner receives the highest quality of installation, optimal level of performance, and longest possible service life for their investment.
  • Commissioning and Re-Certification – GST delivers the expertise to verify chiller performance meets the specified design criteria for CHW temperature at part-load and/or peak load operation, as well as specified energy efficiency requirements. We perform comprehensive testing to verify system efficiency. Our expert teams benchmark energy data, calibrate settings, measure key metrics, provide recommendations, and take action to extend the life and efficiency of your equipment. We help you maintain facility readiness while saving on utility costs and reducing the frequency of system recapitalization/replacement.
  • Service & Repair – GST’s professional and expert technicians are certified to service and repair various chiller system(s). GST preventive maintenance and customized brand agnostic solutions keep your systems working at peak performance. With experienced teams around the world, we provide 24/7 emergency service to get your system operational. We are your support whether you operate a high-volume chiller, a mission critical cooling system, or any system in between.
  • Equipment Upgrade & Rebuild – GST can upgrade and/or rebuild chiller systems in place to maximize efficiency, minimize service calls, eliminate surprises, and control cost of operation. GST can replace worn parts, adapt chillers to changing operating conditions, or enhance the reliability of the chiller by installing the latest and most reliable products available.
  • Training – GST offers training sessions for clients. Participants will learn design and control of chiller start up procedures, servicing, and off-season maintenance on their specific systems. We offer the right balance of classroom theory and hands-on training.

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What We Do

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Project Experience

Service Sector:
Public Private
Project Types:
New Alterations/Renovations Interior Fit-Ups Service Work/Repairs
Project Size:
From $1,000,000 to $2,000,000
Education (K-12)
School / College / University
Fire / Police Station
Gas Station
Hospital / Nursing Home
Hotel / Motel
Industrial Maintenance
Apartments & Condominiums
Office Building
Power Generation & Distribution
Terminal - Airport / Bus / Railroad
Church / Synagogue
Retail Store
Jail / Prison
Arena / Stadium
Club House / Community Center
Mixed Use
Secure and Shielded Facilities
Storage Facility / Warehouse
Grocery Stores
Assisted Living
Single Family Residential
Design Build
Data Centers - Mission Critical
Swimming Pool
Non-Residential Building
Animal Hospital / Kennel
Court House
Fitness Center
Residential Building

Service Areas

Preferred Brands & Manufacturers

Trane Comfort Specialist
Trane Comfort Specialist


Founded In: 2019
Size: 10-19 Employees
Annual Vol: $500,000 - $1 million
DUNS: 117032418
Minority Business Enterprise Small Business Enterprise Veteran-Owned Small Business Service-Disabled Veteran-Owned Small Business
Our Licenses:
Issuer: State of Georgia
Qualifier: Justin O'Brien
Expiration: Does Not Expire
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