Now Hiring:

HVAC Technicians, Plumbers & Plumber Helpers, Sheetmetal Mechanics, and more!

Mechanical Maintenance And Construction Companies

Cullum has been the top name in mechanical construction and HVAC service organizations in the Southeast since 1972.

Cullum Constructors, Inc.

Cullum Constructors, Inc. provides mechanical design and construction services.

Cullum Services, Inc.

Cullum Services, Inc. is an HVAC industry leader in repair, service, installation, and maintenance specializing in industrial and commercial HVAC systems.

Mechanical Maintenance And Construction Companies

Cullum has been the top name in mechanical construction and HVAC service organizations in the Southeast since 1972.

Join Our Team

We Are Hiring!

Available Positions:


HVAC Service Technicians


Service Plumber


Commercial Plumbers & Helpers


Sheet Metal Mechanic & Helpers


HVAC PM Technicians



About Cullum

Established in 1972, Cullum now consists of two flourishing subsidiaries: Cullum Constructors, Inc. and Cullum Services, Inc. Over its extensive history, Cullum’s notable growth has enabled the organization to secure unlimited licenses in mechanical  and general construction in South Carolina, along with mechanical and plumbing licenses in North Carolina and Georgia. Cullum specializes in commercial plumbing and HVAC service, repair, maintenance and installation for commercial systems. Cullum is capable of effectively managing projects of all sizes and scopes with flexibility and comprehensive support. Contact Cullum today to discuss your upcoming projects.

What We Do

Mechanical Engineering and Construction

Project Management
Process Pipe

HVAC Services

HVAC Preventive Maintenance
HVAC Installation
HVAC Retrofitting
HVAC Replacement
HVAC Repair

Full-Service Mechanical
Maintenance And
Construction Companies

Cullum has been the top name in construction and HVAC service organizations in the Southeast since 1972. Positively impacting and serving commercial and industrial industries is the company’s goal, and operations are divided into two thriving subsidiaries to continue to set the standard for customer service.

Cullum’s Core Values

Through teamwork and collaboration, we deliver positive results for employees, suppliers and customers in our planning and execution of every project.

We acknowledge everyone has value and we treat them with dignity to build relationships based on  trust that are essential to our growth.

With training and development we convert our ideas and experience into action, expanding our capability to add value to the organization and those we serve.

We have the courage to consistently conduct business with sound moral principles and character with reliability and fairness at all levels.

Cullum Numbers in 2023

Hours Worked


Team Members


Cullum specializes in heating, ventilation, air conditioning (HVAC), plumbing, medical gas piping, and process piping projects. It also has extensive project experience with manufacturing facilities, laboratories, convention centers, hospitals, sports complexes, aquariums, dormitories and office buildings.




Technicians have extensive knowledge and technical skills in servicing a diverse range of HVAC equipment from small split systems to large chilled/hot water systems, including cooling towers and chillers.

Paramount to Cullum’s services is the company’s expert project management team. The majority of project managers and superintendents have been with Cullum for over 20 years, and this expertise contributes to service excellence during all phases of any project.

  • GreenvilleGreenville Office:(864) 228-6571

  • ColumbiaColumbia Office:(803) 951-9366

  • CharlestonCharleston Office:(843)-747-2900

Cullum holds licenses in the following areas:

South Carolina – unlimited mechanical contracting license and unlimited general contracting license

North Carolina – mechanical contractor license and plumbing license

Georgia – mechanical contractor license and plumbing license