Job Description. HVAC Service Technician: SIGN ON BONUS UP TO $2,000. Here at. 3D Air Services, LLC. we have been growing. CRAZY. fast. We have a great, energetic, growth-oriented family who is looking for help keeping the train running. We have customers. We have the systems. We have the marketing. We have the training. We have the trucks. You deserve a company that has owners who will recognize you for your hard work and help you grow career-wi...