History

Since 1976, Mark III has evolved from a single-trade electrical contractor to a MEP construction and service company delivering projects across California.

The Mark III Story

On January 1, 1976 in a Denny’s restaurant in Sacramento, Mark O’Brien sat down with Buzz Oates and Charlie Massie to discuss a business opportunity that would lead to a long-term partnership. Mark shared his vision to build an electrical subcontracting company, and Buzz and Charlie agreed to invest. The company was conceived that morning inside Denny’s. They would name it “Mark III Construction,” representing each of the original three investors.

Mark found himself running a company with no experience handling payroll or purchase orders. His first hire was his brother, Tim, followed by an accountant, his neighbor. Soon after, they were a team of 25.

Their days were spent in the field and their nights were spent doing paperwork. Within months, Mark saw an opportunity to expand beyond electrical work, adding mechanical and plumbing trades to their operations – the “Power of One” approach was born.

Fast-forward to present day, Mark III remains a family-owned company. Partners Dan Carlton and Mike O’Brien have expanded the company to include the MEP trades in addition to underground utilities and a Service department. Mark III Headquarters still operates within the same building it began in in 1976, with an additional office opened in Fresno. In line with the company’s shift toward manufacturing, Mark III has adopted a new vision to expose the world to a new way to build.

“Find out what you’re great at and make it your lifelong profession.”

Mark O’Brien, Founder

Over The Years

1976

Mark III is founded and shares a small office space with Buzz Oates and Charles Massie off Florin Perkins Road – the company’s material yard only 10 x 20 ft.

1977

Mark III outgrows their small space and relocates to an office roughly 2 miles away off Signal Court.

1982

Five years later, Mark III is granted the opportunity to move back into the Florin Perkins office as Buzz Oates separates his development company. This time, Mark III rents the entire building but shares offices with employees from the “Lumber Jack.”

1987

Mark III purchases the building and takes over the entire office.

1997

Mark III purchases the adjacent building to house the fabrication team until 2019.

2007

New owners, Dan Carlton and Mike O’Brien, focus on MEP subtrades.

2014

Mark III opens additional office in Fresno, CA.

2017

Mark III purchases new office in Fresno, and team relocates to larger space with a dedicated warehouse.

2019

Chief Financial Officer, John Cassidy becomes partner and Mark III opens MEP Manufacturing Facility in Power Inn District.

Contact Us

Corporate Office

5101 Florin Perkins Road
Sacramento, CA 95826
Phone: 916-381-8080 Fax: 916-386-0363

Fresno Office

5252 E. Home Avenue
Fresno, CA 93727
Phone: 559-353-2744 Fax: 559-840-1460