It's About Trust

Water and Wastewater
Master Builder of Choice

J.R. Filanc Construction Company, Inc. is an award-winning, general engineering and design-build contractor that constructs, renovates, and expands water and wastewater treatment, biosolids management, and waste-to-energy facilities throughout the Western United States. Since our founding in 1952, we have completed more than 300 facilities for the public, private and federal sectors. Our projects range from emergency repair work to $100+ million dollar facility construction and expansion. Our principals have over 200 years of combined experience in the construction of water and wastewater facilities. As a general contractor, Filanc typically self-performs over 70 percent of work with our own forces in the categories of pipefitting, mechanical, structural, concrete, and earthwork. We deliver projects utilizing four methods of project delivery: traditional bid-build, design-build, construction manager at risk and job order contracting. Our projects range in scope from major undertakings spanning several years to relatively small repairs.

Our Chairman of the Board, Jack Filanc, had over 50 years of water and wastewater construction experience, and was one of the original founders of the company. He was actively involved in estimating and value engineering for the company. Always a friend of the industry, Jack established an endowment in 2005 that provides annual general funding for the J.R. Filanc Construction and Engineering Management program at San Diego State University. This program was designed to fulfill the future professional construction engineering and management workforce needs of the local building industry.

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70 Years of Experience…

In 1952, Jack Filanc, an original founder of J.R. Filanc Construction Company, formerly incorporated with three other partners as Weardco Construction with a base of 30 employees. Jack bought out the other partners and moved the company to San Diego County. He renamed it J.R. Filanc Construction Company. The business opened with Jack serving as President. As a family business, Jack passed the baton to Peter Filanc as President in 1990. Another son, Mark, took over as President in 2007. Many years and many projects later, Jack was still active in the business as Chairman of the Board, but also complemented the organization with time-honored wisdom in estimating, value engineering and field operations. Jack’s son, Mark, holds a position in senior management with the company as Chief Executive Officer.

Then on April 2, 2011, the first non-Filanc, Harry Cosmos was promoted to President. Harry has over 27 years of construction experience with Filanc and plays a critical role in leading our organization as it grows over the next decade and beyond.

Another milestone transpired on June 27, 2011, when Filanc obtained a design engineering department. We are proud to announce that we have all design-build capabilities in-house for projects ranging from less than $1 million to approximately $30,000,000. As the economy has changed, we have shifted with the needs of the economy. Typically in this industry design firms have acquired construction divisions to their businesses. To our knowledge, this is the first time in our industry and region that a contractor of our capacity has obtained a design engineering department.

Today, we have expanded to a team of approximately 300 people, completing more than 300 major projects for counties, cities and private companies throughout the Southwest. Filanc has applied our core values of integrity, respect and problem solving to every construction project, and have made many friends and forged lasting relationships with our industry partners and suppliers.

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Our Executive Team

Mark E. Filanc, PE, DBIAChief Executive Officer (CEO)


Linda StangelChief Financial Officer (CFO)

Vincent L. DiazVice President, Construction Operations

David J. KiessVice President, Director of Repair & Maintenance Division

Bob ZaiserVice President, Chief Estimator

Norbert J. SchulzVice President, Marketing & Business Development

Gary Silverman, PE, BCEE, DBIA, ENV SPVice President, Engineering

Fillanc Response to the COVID-19 Virus Pandemic

During this period of uncertainty regarding the nation’s response to the COVID-19 virus pandemic, please be aware that Filanc will continue to perform construction, maintenance and repair of our essential water and wastewater infrastructure.

Filanc 2019 AGC Safety Excellence Award

Filanc is committed to the elimination of occupational injury and illness. Each day that we are on the job, we strive to provide a safe working environment for our employees.

Happy Holidays from Filanc!

Filanc is wishing you a season of joy, and best wishes for a prosperous and successful new year!

Filanc-Hazen Broke Ground in Lemoore

The Progressive Design-Build team of Filanc in association with Hazen & Sawyer along with AdEdge and the City of Lemoore reached a very critical milestone – breaking ground on the City’s new Water Treatment Plant.