Mechanical Engineers Experience & Expertise make us your partners for Success...

About TEP Engineering

TEP Engineering, formerly “The Engineering Partnership” has developed a reputation for high quality, detail oriented Mechanical Engineering design while serving the diverse clientele of the San Francisco Bay Area.  

We provide a full range of Mechanical Engineering services including heating, ventilation, air conditioning, refrigeration, process piping, plumbing and control systems design. We also perform energy studies, Title 24 energy compliance calculations and LEED work. Our projects include wineries, health care facilities, pharmaceutical facilities, hotels & resorts, custom residences, restaurants, apartment buildings, offices, industrial buildings and schools.

We strive to provide innovative and functional mechanical designs within the framework of project requirements.  Every project has a unique blend of cost, energy, environmental, aesthetics, space and technical considerations.  We endeavor to consider all of these factors in creating the most appropriate mechanical design.  We have been involved in pioneering unique and energy efficient mechanical designs, such as hydronic radiant cooling for wineries, water source heat pumps coupled to lakes, GeoExchange heat pump systems, advanced heat recovery systems, and indirect-direct evaporative cooling systems.   As energy prices have soared, we have found new approaches to reduce energy consumption, optimize energy use and minimize the environmental impact of our mechanical systems.

In addition to our strong background in engineering consulting, our staff has over 60 years of HVAC and plumbing contracting experience.  This combination of experience gives us comprehensive knowledge of construction related issues and is one of the reasons we are highly regarded by HVAC, plumbing and refrigeration contractors.  Many of these contractors team with us on design-build projects.



“TEP Engineering has provided us with valuable HVAC and plumbing design during our two year $50 million modernization program.   During this time, TEP met all our aggressive schedules and demanding project requirements.  Through their responsiveness and versatility they have contributed to the success of our modernization project.”

Jere Starks, Vice President Facilities & Construction
Infineon Raceway

“We have been working with Rob Main since 1994.  Rob is creative in his design and works in developing practical solutions to our needs.  He is timely and is a nice addition to our design and construction team.  He has the same focus to quality work whether the project is large or small”

Bruce Cakebread
Cakebread Winery

“As a pharmaceutical drug manufacturer in the North Bay, DEY L.P. has depended on TEP Engineering to meet our special needs for controlled environment HVAC and other mechanical process design. Based on technical expertise, quality performance and an established long-term relationship, TEP Engineering is DEY L.P. 's preferred mechanical engineering consultant.”

Dennis McKinnon
Director of Engineering and Facilities, Dey L.P.

“I have worked with TEP since the firm was founded and before that worked with Rob Main on a number of projects. I have always found Rob and TEP to be very professional, highly reliable and very knowledgeable in conceptual design and engineering tasks. I have come to appreciate the high level of service I always receive from Rob Main and TEP.” 

Paul D. Irwin
Vice President, Bell Products, Inc.

“Tierney/Figueiredo Architects designs a wide variety of projects for both private and public agency clients.  Over the years, TEP Engineering has always given us prompt service and innovative real-world solutions.”

Randy Figueiredo
Tierney/Figueiredo Architects AIA