ATCS Appoints Michael Rosenfeld as Chief Executive Officer
Summary
Brian Riffel also named Chief Operating Officer
HERNDON, Va. – ATCS today announced the appointment of Michael Rosenfeld, PE, as chief executive officer, effective January 3, 2025. Rosenfeld assumes the role from Young Ho Chang, PE, who retired at the end of 2024 as part of a multiyear strategic leadership transition. The company also announced that Brian Riffel, PE, has been named chief operating officer.
“Leading ATCS has been one of the most rewarding experiences of my career, and I’m incredibly proud of what we’ve accomplished together,” said Chang. “Michael’s appointment as CEO is the result of a thoughtful, strategic transition process focused on sustaining ATCS’ growth and building on its strong culture of caring, learning, and performing. He has been instrumental in preparing the company for this next chapter—championing innovation, strengthening collaboration, and advancing the culture that defines ATCS. With his leadership and vision, now is the right time.”
Since joining ATCS in 2008, Rosenfeld has held key leadership roles, bringing 30 years of expertise in complex alternative program delivery, project controls, and construction management. Promoted to chief operating officer in 2021, Rosenfeld has driven operational excellence, enhanced collaboration, and strengthened ATCS’ culture of innovation. His leadership has been instrumental in optimizing processes, expanding services, and positioning ATCS as a trusted leader in the AEC industry.
“It’s an incredible honor to lead ATCS at this exciting time,” said Rosenfeld. “With a strong culture as our foundation and a clear focus on growth and innovation, we’re ready to set the pace for the future. I’m committed to building on our momentum with a focus on expanding services in new markets, advancing technologies, and delivering greater value to our clients while supporting growth and development opportunities for all our employees.”
Riffel, who joined ATCS in 2019 as Baltimore operations manager and corporate design discipline lead, brings 30 years of experience in operations and project management, rooted in hands-on roadway and transit engineering. Most recently, he served as senior vice president and regional manager, where he strengthened collaboration, delivered high-quality results, and expanded ATCS’ geographic footprint. As COO, Riffel’s leadership will build on these achievements, advancing operational efficiencies and expanding service capabilities to support the firm’s growth strategy.
“I’m grateful for the opportunity to be ATCS’ COO,” said Riffel. “I’m motivated by the responsibility of driving the tactics behind our 10-year strategic plan and the opportunities it will create for our current and future employees.”
About ATCS
ATCS is a leading engineering consulting firm offering comprehensive solutions across a wide range of fields, including transportation, traffic planning, environmental planning, geospatial, site civil, bridges and structures, rail and transit, buildings and facilities, air and noise, program management and project controls, water resources, and emergency management services. ATCS is committed to excellence in all aspects of our work, ethical business practices, client-focused service delivery, and social responsibility towards the communities we serve and operate in. Learn more at atcscorp.com and stay connected with ATCS on LinkedIn and Facebook.
