Client List

Company

Client List

ON-SITE TECHNICAL SERVICES INC prides itself on building relationships with its customers earning repeat business. At ON-SITE we earn our clients trust and respect by providing honest and consistent Q A services. Below is a representative sample of the clients we have built relationships with:

Construction Companies

  • Adams/Mallory Construction Co. Inc.
  • Amorosa Construction
  • ARB Incorporated
  • Barnett Electric, Inc.
  • Bernards Builders and Management Services
  • BP West Coast Products LLC
  • Blois
  • BreitBurn Energy Partners L.P.
  • Brutico
  • C.W. Roen Construction Company
  • Clark/McCarthy Joint Venture
  • Colich & Sons
  • Comet Electric
  • Diablo Contractors, Inc.
  • Fielding Electric, Inc.
  • Flatiron
  • FTR International, Inc.
  • Griffith Company
  • Helix Electric, Inc.
  • JF Shea
  • Kiewit Industrial
  • Kiewit Northwest Company
  • Kiewit Pacific Company
  • Kiewit Power Constructors
  • Mitsubishi Power Systems
  • Morrow Meadows Corporation
  • Murray Corporation
  • Pinner Construction Company Inc.
  • PPC Construction, Inc.
  • R.J. Daum Construction Company
  • R.L. Brosamer, Inc.
  • Royal Construction
  • S. J. Amoroso Construction
  • Sinanian Development, Inc.
  • Steve P. Rados, Inc.
  • Stronghold Engineering
  • Swinerton Builders
  • Turner Construction
  • Tutor-Saliba Corporation
  • V.K. Mason Construction Ltd.
  • W.A. Rasic Construction

Public Agencies

  • Alameda Corridor Engineering Team
  • California Department of Water Resources
  • Calleguas Municipal Water District
  • City of Los Angeles Department of Public Works
  • City of San Diego
  • City of Tacoma- Power
  • Colorado Springs Utility Commission
  • Denver Water
  • East Bay Municipal Utilities District
  • Eastern Municipal Water District
  • Hawaiian Electric Company
  • Inland Empire Utilities Agency
  • Los Angeles World Airports
  • Metropolitan Water District of Southern California
  • Municipal Water District of Orange County
  • Padre Dam
  • San Diego County Water Authority
  • West Basin Municipal Water District
  • Western Water Works

Engineering Firms

  • BENPRO, Inc
  • Berg & Associates, Inc.
  • Brookman Edmonston Engineering
  • Butier Engineering, Inc.
  • CH2M Hill
  • CTL/Thompson, Inc.
  • Dewberry Engineering
  • EPC Consultants
  • Jacobs Engineering Group Inc.
  • Kennedy Jenks
  • Kumar & Associates, Inc.
  • Louis Berger
  • Moffit-Nichol
  • Montgomery Watson Harza
  • NV5
  • Parsons
  • Parsons Brinckerhoff
  • Power-Tech Engineers Inc.
  • R.W. Beck
  • Richard Brady and Associates
  • Simon Wong
  • Tetra Tech

Fabricators

  • Ameron/NOV
  • British Petroleum
  • California Pipe Fabricators
  • Circulating Air Inc.
  • Flowserve
  • Henry Pratt
  • JIFCO Pipe Fabricators
  • Mid America Pipe Fabricating & Supply Llc
  • Neenah Foundry
  • Northwest Pipe Company
  • Pacific Coast Flange Inc.
  • Palmcast Steel Fabrication, Inc.
  • Peterson Hydraulics, Inc.
  • Poly Tech Corporation
  • Rinker Materials
  • Roscoe Moss
  • Siemens
  • Southland Pipe
  • Southcoast Lighting
  • Sulzer Pumps
  • Tank Specialists of California
  • Tower Structures, Inc
  • U.S. Filters
  • VAG
  • Valmont Industries, Inc.
  • Warminster Fiberglass
  • Wessex Industries

QA Firms

  • Bureau Veritas- Japan
  • Marrs Services, Inc.
  • Oversea Merchandise Inspection Co., Ltd. -Japan
  • Twinning Laboratories
  • IHI / Highbridge Ltd. Japan
  • FW Kohl Industrial Group
  • Inteco Inspection and Testing Korea
  • Iteng Engineering India