All Services Engineering & Architecture Mechanical $5/hr · Starting at $25 I specialize in services such as HVAC design, plumbing design, piping design and fire protection design for commercial, industrial and government facilities. About $5/hr · Ongoing Download Resume I specialize in services such as HVAC design, plumbing design, piping design and fire protection design for commercial, industrial and government facilities. 0 Reviews This Freelancer has not received any feedback.