Founded in 1970 by John J. McMahon, McMahon Steel Company, Inc. is a family-owned business that has established itself as a leader in the steel fabrication and erection industry in Southern California. Originally starting as C & B Steel, Inc. in National City, the company evolved significantly over the years, notably relocating to Chula Vista in 1979 to enhance its structural capabilities. In 2000, the company was rebranded to McMahon Steel Company, Inc. as it transitioned to the second generation of leadership under John’s sons, Derek and Kevin McMahon.
Over nearly five decades, McMahon Steel has successfully completed over 1,200 projects across the Southwest region, serving a diverse range of commercial and industrial clients. The company is committed to excellence in its craft, underpinned by a mission to deliver high-quality steel structures with an unwavering emphasis on punctuality, competitive pricing, and unparalleled customer service. Their operational ethos revolves around a “can-do” attitude and a steadfast commitment to quality, safety, and environmental responsibility.
As an AISC and City of Los Angeles certified provider, McMahon Steel is well-equipped to handle all facets of steel construction, from detailing and fabrication to installation. With a rich history and a dedicated focus on maintaining industry-leading safety standards, the company continues to build strong relationships while contributing significantly to the development of infrastructure in Southern California.
