1940

1940

Mac & Sons was founded in downtown San Francisco in the area that is now the Moscone Center

1951

1951

Change our name from Mac & Sons to J.W. McClenahan and moved to our current address 2301 Palm Ave, San Mateo

1971

1971

Gary McClenahan starts with the company.

1975

1975

Sparks Office Opened

1985

1985

Completed the Arco Arena in Sacramento, It was the NBA Arena holding 10,333 people and home of the Sacramento Kings

1986

1986

Sparks completed our first major project in Lake Tahoe, Harvey’s Casino at Stateline, Nevada. Including 742 hotel rooms

1995

1995

First big casino project: Silver Legacy 1,720 rooms, 89,200 sq. ft.

Chuck Beaupre started (now current Director of Operations)

Completed the National Bowling Stadium

1997

1997

Ross Kelly, our current president and CEO joins the team as Safety Director

2008

2008

The company completed a succession plan becoming an employee-owned S corporation

2014

2014

The company was an early adopter in utilizing PEX piping for multi-family housing for hot and cold domestic water systems

2016

2016

Completed one of our largest prison projects: Mule Creek Infill Complex in Ione, CA; 550,000 sq. ft. of construction for 1,584 Level II inmates, spread across 24 buildings on an 80-acre site

2017

2017

Completed largest new construction project in company history: Lucile Packard General Hospital in Palo Alto, CA. - 521,000 sq. ft.

Ross Kelly becomes JWM’s president and CEO

2018

2018

Completed Chinese Hospital in San Francisco. Key project in respect to construction challenges.

Completed Transbay Block 8, our largest high-rise residential project to date: 56 stories, 847,700 sq. ft., 548 units

2021

2021

Completed the award-winning 10th and O project in Sacramento, a 10-story, 472,600-sq.-ft. government project: LEED Platinum, Zero Net Carbon, Zero Net Energy