On-Site Welding Services in Southern California

California On-Site Welding’s services offer the best mobile welding services available for jobs that you can’t transport or move. With over 40 years of industry experience, we specialize in welding projects and materials of all varieties, from plasma arc cutting to machinery welding, serving a broad range of industries and applications. Our portable welding services allow you to sit back as our experts come to you fully equipped, certified from AWS to ASME Section IX.

At California On-Site Welding, we understand the importance of urgency, which is why we offer 24-hour mobile welding. Certain welding issues, like heavy work equipment, staircase railings, and pipes, require immediate attention to maintain your business’s productivity, reduce safety hazards, and prevent issues from escalating. For Southern California on-site welding services, give California On-Site Welding a call!

Our expertise includes:

  • 24/7 Emgergency On-Site Welding
  • Steel Welding
  • Stainless Steel Welding
  • Vehicle and Tractor Trailer Frame Welding
  • Heavy Equipment Welding
  • Industrial Machinery Welding
  • Gate Welding
  • Pipe Welding
  • Tig Welding
  • Stick Welding (SMAW)
  • Aluminum Tig Welding
  • Mig Welding
  • Machinery Welding
  • Sheet Metal Welding
  • Rebar Welding
  • Power Plant Welding
  • Manufacturing welding
  • Cast Iron Welding
  • Government background checks welcomed
  • Credit Cards Accepted


Aluminum TIG, MIG, Structural, Lite Gauge


Structural Alumimum Welding Certified

ASME Section IX Certified

Gas Pipe, Water Pipe


Specializing in Plasma Arc Cutting


CA State License # 999417 , Since 1995

Our service area incluces all of Southern California:

With our reliable team of certified welding professionals, multiple service trucks and specialized welding equipment, we are fully equipped to handle industrial, commercial, and residential welding jobs of all sizes. Our portable welding services are available throughout all of Southern California!

Client Testimonials

Richard G. Pascuzzo Former President, All American Crane Maintenance

I’ve used the services of California On-Site Welding and Dave Cutsinger for commercial, industrial and residential jobs. They are prompt, fairly priced, reliable and provide high quality solutions to complex fabrication challenges. The welds are some of the finest I’ve seen and the selection of the right tool for the right job is always available due to their extensive inventory of welding and fabricating equipment. California Onsite Welding has been a part of many projects in the past and will continue as such, well into the future.

Scott Crail Quality Assurance Manager, Delphi Control Systems, Inc.

California Onsite Welding has been a trusted Supplier for Delphi Control Systems for over two decades. The quality, timeliness and expertise provided by California Onsite Welding has enabled Delphi Control Systems to continue to support its Customers with welded sampling and analysis products that always have a professional finished appearance.

Rene Freyre

Dave, from California on site welding came out to work on my feather light Weekend Warrior. Since my toy hauler was originally built for light trucks, and had mileage. I started to notice structural cracks in the welding joints that held the hangers for the leaf springs. This was causing additional structural damage on the trailer. Dave was extremely professional. I had google drawings on fixes others had performed. Dave, went beyond what I call normal work. Dave made recommendations of my pictures from Google, Dave welded pieces of steel in spots that others would take the short/easy approach. Without adding much weight, my trailer is now in better structural integrity that the factory model. I have taken several trips since Dave performed the work. The trailer tracks true, and is able to handle the rough terrain when I go to the desert. In my experience, I will never use anyone but Dave at Californiaonsitewelding versus anyone else. Dave, thank you for your meticulous and excellent workmanship. A very happy customer.

Mark Dubreuil, TLM Properties

Just want to send an email to thank California On-Site Welding for exceeding our expectations! Your company is FIRST class, 10 out ten for quality and workmanship. Dave was great to work with, always showed up on time and did fantastic job. Please feel free to use us as a reference should you ever need one!!

Patrick Joyce - Three Peaks Corp

California onsite welding took care of my critical welding needs! No drama or complications, did exactly what he promised, will use in future!

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