The company we keep
Across all of our operating companies, the unwavering commitment to the highest quality workmanship and the deep integrity of our people serve as the common, defining through line that binds us together.
Incorporated on March 28th, 1898, Smith & Oby has grown into one of Ohio’s most respected mechanical contractors poised to continue our craft well into our second century.
DSO Mechanical provides comprehensive mechanical services for commercial and industrial facilities across West Virginia, servicing over 100 major projects with 70% retention rate.
Our craft
Work we stand behind
Built with pride, these projects reflect the exceptional strength and skill of our teams.

Smith & Oby
Sherwin Williams HQ
A 38–story high rise tower and pavilion totaling approximately 1.16M sq. ft.

Smith & Oby
Ohio University
HVAC and plumbing for a 118,000 sq. ft. educational facility with a science lab.

Smith & Oby
Ahuja Medical Center
A 350,000 sq. ft. hospital with 144 patient rooms and 10 operating rooms.
Build with us
We’re pursuing acquisitions of leading mechanical contracting companies focused on building security and stability not only for the job at hand — but the communities we do business.