William S. Yearsley
Chief Executive Officer at Sioux Creek Silica LLC
Profile
William S.
Yearsley is the founder of American Civil Constructors, which was founded in 1996.
He held the title of Chairman & Chief Executive Officer from 1996 to 2007.
Dr. Yearsley's current job(s) include being the President, Chief Executive Officer & Director at Terra Co2 Technologies Ltd., Chief Executive Officer & Director at Sioux Creek Silica LLC since 2017, and Lead Outside Director at Tri-Arc LLC.
His former job positions include being the Chief Executive Officer & Director at Real Goods Solar, Inc. from 2011 to 2012, Chairman & Chief Executive Officer at Redland Aggregates Ltd., Independent Director at Northwest Pipe Co. from 2020 to 2022, Director at Milender White Construction Co., and Professor at the University of Colorado Boulder from 2007 to 2011.
Dr. Yearsley's education history includes a graduate and doctorate degree from Colorado State University and an undergraduate degree from Southern Illinois University.
William S. Yearsley active positions
| Companies | Position | Start |
|---|---|---|
Sioux Creek Silica LLC
 Sioux Creek Silica LLC Construction MaterialsNon-Energy Minerals Sioux Creek Silica LLC is a private company based in Chetek, CO. William S. Yearsley has been the CEO of the company since 2014. | Chief Executive Officer | 2017-02-28 |
Tri-Arc LLC
 Tri-Arc LLC Industrial MachineryProducer Manufacturing Tri-Arc LLC provides workplace safety services. It engages in solving climbing and access problems relating to code compliance and productivity. Its products include engineered access solutions, work platforms, ladders, verastep and gates & guardrails. The company was founded in 1947 and is headquartered in Pittsburgh, PA. | Director/Board Member | - |
Terra Co2 Technologies Ltd.
 Terra Co2 Technologies Ltd. Construction MaterialsNon-Energy Minerals Terra Co2 Technologies Ltd. is a Canadian company that manufactures portland cement. The CEO of the company is William S. Yearsley. | Chief Executive Officer | - |
Former positions of William S. Yearsley
| Companies | Position | End |
|---|---|---|
| NORTHWEST PIPE COMPANY | Director/Board Member | 2022-02-10 |
| REAL GOODS SOLAR, INC. | Chief Executive Officer | 2012-07-29 |
| University of Colorado Boulder | Corporate Officer/Principal | 2010-12-31 |
American Civil Constructors
 American Civil Constructors Engineering & ConstructionIndustrial Services American Civil Constructors provides construction services. Its services include civil infrastructure, mining and industrial. The company was founded by William S. Yearsley in 1999 and is headquartered in Littleton, CO. | Chief Executive Officer | 2006-12-31 |
Redland Aggregates Ltd.
 Redland Aggregates Ltd. Construction MaterialsNon-Energy Minerals Part of Goonvean Holdings Ltd., Redland Aggregates Ltd. is a British company that specializes in sand and gravel, stone quarrying, road surfacing materials, road surfacing and concrete products. The company is based in Reigate, UK. Redland Aggregates was acquired by Goonvean Ltd. on September 01, 1995 for $12.85 million. | Chief Executive Officer | - |
Training of William S. Yearsley
| Colorado State University | Doctorate Degree |
| Southern Illinois University | Undergraduate Degree |
Experiences
Positions held
Connections
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Listed companies | 1 |
|---|---|
| NORTHWEST PIPE COMPANY | Non-Energy Minerals |
| Private companies | 7 |
|---|---|
Real Goods Solar, Inc.
 Real Goods Solar, Inc. Engineering & ConstructionIndustrial Services Real Goods Solar, Inc. engages in the provision of solar energy systems to homeowners and commercial building owners. It offers turnkey services, including design, procurement, permitting, build-out, grid connection, financing referrals, and warranty and customer satisfaction activities. The company was founded in 1978 and is headquartered in Boxborough, MA. | Industrial Services |
Redland Aggregates Ltd.
Redland Aggregates Ltd. Construction MaterialsNon-Energy Minerals Part of Goonvean Holdings Ltd., Redland Aggregates Ltd. is a British company that specializes in sand and gravel, stone quarrying, road surfacing materials, road surfacing and concrete products. The company is based in Reigate, UK. Redland Aggregates was acquired by Goonvean Ltd. on September 01, 1995 for $12.85 million. | Non-Energy Minerals |
American Civil Constructors
American Civil Constructors Engineering & ConstructionIndustrial Services American Civil Constructors provides construction services. Its services include civil infrastructure, mining and industrial. The company was founded by William S. Yearsley in 1999 and is headquartered in Littleton, CO. | Industrial Services |
Milender White Construction Co.
 Milender White Construction Co. Engineering & ConstructionIndustrial Services Milender White Construction Co. provides comprehensive pre-construction and construction management services. It offers pre-construction, general contracting, design and build and restoration and rehabilitation. The company was founded by Bryon White and Mike Milender in 1997 and is located in Arvada, CO. | Industrial Services |
Terra Co2 Technologies Ltd.
Terra Co2 Technologies Ltd. Construction MaterialsNon-Energy Minerals Terra Co2 Technologies Ltd. is a Canadian company that manufactures portland cement. The CEO of the company is William S. Yearsley. | Non-Energy Minerals |
Tri-Arc LLC
Tri-Arc LLC Industrial MachineryProducer Manufacturing Tri-Arc LLC provides workplace safety services. It engages in solving climbing and access problems relating to code compliance and productivity. Its products include engineered access solutions, work platforms, ladders, verastep and gates & guardrails. The company was founded in 1947 and is headquartered in Pittsburgh, PA. | Producer Manufacturing |
Sioux Creek Silica LLC
Sioux Creek Silica LLC Construction MaterialsNon-Energy Minerals Sioux Creek Silica LLC is a private company based in Chetek, CO. William S. Yearsley has been the CEO of the company since 2014. | Non-Energy Minerals |
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