CEO and Founder of RMG Erectors & Constructors, Iron Will Racing and RMG Luxury Services. 

Bobby Mesmer is a highly successful serial entrepreneur and the founder and CEO of RMG Erectors & Constructors, LLC, the world’s largest pre-engineered metal building erector. Under his leadership, RMG erects more than 8 million square feet of buildings annually, earning a $4 billion valuation and recognition on the Inc. 5000 List four years in a row. For over 25 years, Bobby has built, scaled, and sold multiple successful businesses, consistently identifying opportunities and transforming them into market leaders. Known for his hands-on leadership, he fosters a strong company culture defined by accountability, buy-in, and growth—believing that empowering employees at every level creates alignment, commitment, and long-term success. This culture-driven approach has fueled RMG’s rapid growth, earned him induction into the Titan 100 Hall of Fame, and established him as a visionary entrepreneur. Beyond his companies, Bobby shares his expertise as a sought-after speaker and through business coaching and mentorship, helping leaders and entrepreneurs achieve lasting success.

Latest Podcasts

Bobby Mesmer - Innovation and Trends in Metal Construction

In this MetalCast episode, Heidi J. Ellsworth visits with Bobby Mesmer of RMG Erectors & Constructors to talk about the world of commercial metal buildings. What exactly are these structures, and why are they gaining traction across various industries? They discuss the sustainable practices that are shaping metal construction and ...
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To Sell or Not

S2:E8 In this MetalCast, Heidi J. Ellsworth sits down with Robert “Bobby” Mesmer of RMG Erectors & Constructors of Montana, LLC to discuss the ins and outs of selling your business. As the owner of multiple businesses including one of the world’s largest metal building erector companies, he will cover succession, ...
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