Designed with passion and engineered to perfection, Turley & Associates at your service

Mechanical Engineering Group, Inc.

Turley & Associates Mechanical Engineering Group, Inc. was originally founded by John C. Turley in 1975 and has been in practice for over 40 years.  Over the decades, clients have relied on the quality of work and dependability of the Turley & Associates team.

Brian J. Provencal, M.E., President, and John W. Thompson, M.E., Principal, manage each design team.  Our Principals are hands-on engineers and are involved with the daily engineering in a project to ensure the client obtains the maximum experience from the engineering team. Each year we complete approximately 250 projects ranging from individual tenant improvements in malls to $250 million hospitals.  Much of our work comes from clients pleased with past projects and references from other clients.  Our longevity and reputation for quality are well known.

Turley & Associates designs HVAC, plumbing and fire protection systems in buildings throughout California.  Additionally, we are licensed in 23 states, which allow the firm to complete out-of-state projects.  The company’s systems are in facilities throughout the country including medical facilities and hospitals, laboratories, industrial institutions, cogeneration systems, major commercial and government buildings, education, recreation, retail, professional offices, supermarkets, housing and technology.

As our firm has grown over the years, our ability to take on larger and more complex projects has grown.  This growth has also allowed the engineering staff to be involved in all aspects of a project from the early phases of design through construction and project documentation.  Turley & Associates is a certified small business enterprise.


  • AHA
  • AIA
  • ASPE
  • CSHE
  • CASH
  • CSI
  • ICBO
  • NFPA
  • SMPS
  • Sacramento Chamber of Commerce