Large diameter pipeline installation with excavators on public works infrastructure project

Shop Fabrication & Field Welding

Welding for Public Works Infrastructure

Shop-fabricated pipe spools, structural supports, and certified field welding for water infrastructure, treatment plants, and large-diameter steel pipelines throughout California.

Carbon Steel Stainless Steel Duplex Alloys Aluminum

Federal, State & Local Compliant AWS D1.1 ASME CA Lic. 627168 DIR Registered

Send Your Scope On-Call Field Support

(760) 917-6240 · Most quotes within 24–48 hours

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How We Work

From Scope to Completion

Send Your Scope

Share drawings, specs, and project details. We review and clarify requirements.

Get Pricing

Receive detailed pricing within 24-48 hours. No surprises, no hidden costs.

We Mobilize

Shop fab begins or field crew deploys per your schedule. We coordinate with your team.

Deliver Ready

Inspector-ready welds with complete documentation. Your project stays on track.

Portfolio

Featured Projects

Turner-Flatiron Joint Venture

San Diego Airport Terminal 1

Owner San Diego County Regional Airport Authority Value $2.7 Billion

JCW Scope

Field Welding — Utility Pipe Relocation & Tie-Ins

Dragados-Flatiron Joint Venture

California High-Speed Rail

Owner California High-Speed Rail Authority Value $1.2 Billion

JCW Scope

Field Welding — Large-Diameter Steel Casing for Jack & Bore Crossings

Shimmick Construction

Regional Water Reclamation Facility

Owner Elsinore Valley Municipal Water District Value $217 Million

JCW Scope

Shop Fabrication — Site-Wide Electrical Support Structures

Walsh Construction

Arcadia Water Treatment Plant

Owner City of Santa Monica Value $72 Million

JCW Scope

Field Welding — Process Piping & Structural Supports

Capabilities

What We Do

Shop Fabrication

Pipe spools and welded assemblies
Structural support components and frames
Custom welded components for public works

Field Welding

Transmission and process piping
Tie-ins, modifications, and weld-in-place work
Pipeline and structural support assemblies
Connections, tunnel work, underground activities

Engineering Support

Drawing review and detail interpretation
Constructability planning and sequencing
Code interpretation (AWS/ASME)

Project Types

Steel pipe capability 120"+ diameter
Water treatment plants and clearwells
Pump stations
Large-diameter steel pipelines
Airport and transportation infrastructure

Who We Are

Second-Generation. Built on 35 Years of Welding.

Jones Certified Welding was founded in 2021 by Brad Jones, a second-generation welder whose family has been in the trade since 1989. What started as a one-man operation has grown into a full shop-and-field team serving 30+ general contractors on public works projects across California.

We fabricate pipe spools and structural components in-house, and deploy certified field crews for tie-ins, modifications, and weld-in-place work. Our focus is simple: inspector-ready welds, complete documentation, and showing up when we say we will.

Public Sector Experience

Agencies We've Served

Water Districts & Utilities (26)

City of Poway•Vista Irrigation District•Mesa Water District•Goleta Water District•City of Whittier•City of Upland•Corona Department of Water and Power•City of Fountain Valley•Elsinore Valley Municipal Water District•Jurupa Community Services District•City of Oceanside Water Utilities•Olivenhain Municipal Water District•City of Ontario Municipal Utilities•City of Redlands Municipal Utilities•San Elijo Joint Powers Authority•Helix Water District•Coachella Valley Water District•Santa Clarita Valley Water Agency•Eastern Municipal Water District•Orange County Water District•Metropolitan Water District of Southern California•Padre Dam Municipal Water District•Rancho California Water District•Adelanto Public Utilities Authority•Carlsbad Municipal Water District•Fallbrook Public Utility District

Other Public Agencies (5)

San Diego County Regional Airport Authority•California High-Speed Rail Authority•Orange County Sanitation District•City of San Diego Public Utilities•County of San Diego

Coverage