P. Ray Orton, Sr. – Chief Executive Officer and Founder

Paul Ray Orton, Sr. is the founder and CEO of PRO Building Systems, Inc. Ray began his construction career in 1964 after graduating from Auburn University with a Bachelor of Science in Building Construction. He founded P.R. Orton Inc. in 1969 and built the company from the ground up, initially relying on the testimony of happy clients and word of mouth to promote his growing business. P.R. Orton eventually evolved into the very successful PRO Building Systems, Inc. Although partially retired, Ray Orton is still one of the most highly respected in Atlanta’s construction arena, drawing respect and admiration from years of satisfied clients and exceptional building practices.

Edward E. Mock, Jr. – President / Chief Operating Officer

Eddie Mock has been a cornerstone of PRO Building Systems since joining the company in 1980. Armed with a Bachelor of Science degree in Building Construction from Georgia Southern University (1980), Eddie began his career as a Project Manager, initially working in the field before transitioning to the office to focus on estimating and project management.
Over the years, Eddie has risen through the ranks, holding key leadership roles, including General Manager, Vice President, President, and currently, President and Chief Operating Officer. His leadership has been instrumental in building a professional, dedicated team committed to delivering high-quality projects. Under Eddie’s guidance, PRO has achieved an impressive milestone of over 99% repeat business and referrals—a testament to the company’s long list of satisfied customers.
Eddie’s commitment to excellence extends beyond the company. He has served on the Associated General Contractors (AGC) Board of Directors (2013–2016), actively participates in the AGC Legislative Committee, and contributed to the Kirby Building Systems President’s Advisory Council. Motivated by a passion for designing and building projects that meet the evolving needs of customers, Eddie takes pride in creating solutions that support their continued success. 

Steven T. Ellis – Senior Vice President

As Senior Vice President of PRO Building Systems, Steven provides leadership for our in-house design and construction teams as well as oversight of PRO’s architectural and engineering consultants. He is actively involved in every phase of a project from initial concept through construction completion. He consistenetly exhibits expertise in understanding project complexities, navigating jurisdictional approvals and ensuring continuity between design and construction. Steven plays an integral role in developing and maintaining client relationships while demonstrating a strong focus on the collaborative Design-Build approach. He has been with PRO Building Systems since 2005, holds a Bachelor of Architecture from Southern Polytechnic State University and is an active member of the AIA, NCARB and DBIA.