The Best Plumbing Services in Town Proudly Serving the Area Since 1959

The HPS Management Team


Les Denherder

Les Denherder

Purchased HPS Mechanical, Inc. in 1976
Has grown company 3,400 percent since 1976 and oversees staff of 225 in two offices
Master of Business Administration, Pepperdine University, 1989
Certified in Plumbing Engineering from American Society of Plumbing Engineers, 1996

Professional Affiliations:

Plumbing-Heating-Cooling Contractors of California (PHCC)
President, 2007-2008
Board of Directors, 1992-1993

Kern County PHCC - Past President

International Association of Plumbing and Mechanical Officials - San Joaquin Chapter

BIA Plumbers Committee

Kern County Builder's Exchange - Past President

Delta National Plumbing Contractor of the Year, 1997

Appointed to California Apprenticeship Council by Gov. Arnold Schwarzenegger, 2007

Management Team Members

Scott DenherderName:

Scott Denherder


Vice President

Professional Affiliations:

PHCC(CAC) Construction Contractors' Alliance

Member Bio

Scott has successfully managed several complex projects for HPS including the Project Ocean Hangar in Mojave, CA, Division 13 Bus Maintenance in Los Angeles, CA and the new Tejon Outlets Center.

Jay BuenviajeName:

Jay Buenviaje


Project Manager

Member Bio

Over 25 years experience Bachelor of Science in Civil Engineering Mapua Institute of Technology, 1982

Shannon WentworthName:

Shannon Wentworth


Project Manager

Member Bio

Over 24 years in the Plumbing field with over 8 years of Management experience. Multiple certifications in piping applications including Medical Gas Brazing, Zurn Pex, ProPress and CPVC Installation and Design.

Doug DegrootName:

Doug Degroot


General Superintendent

Professional Affiliations:

PHCC Instructor

Member Bio

Over 20 years with HPS Mechanical, inc. Over 10 years plumbing management experience. North-Western Iowa Technical College.

Justice GradowitzName:

Justice Gradowitz


Operations Manager

Professional Affiliations:

PHCC(CAC) Construction Contractors' Alliance, Former Chairman of Central California Credit Association

Member Bio

With over 15 years experience in financial management, Justice supervises our financial and administrative departments including accounting, human resources, information technology and contract/risk management.

The HPS Plumbing Services Difference

4 Reasons We're the Best
  • The Best Plumbers

    The HPS Plumbing Services team is licensed and certified to handle your every need.

  • The Best Services

    Trust us to get the job done right the first time when you enlist our services.

  • The Best Tools

    We tackle every plumbing request with only the best tools and equipment.

  • The Best Customers

    Throughout the years, many first-time customers have become HPS customers for life!