Effective immediately, Nolan will oversee legal, compliance, governance, and risk functions, ARH reported Jan. 7. She served most recently as General Counsel for Zoro Tools, Inc., a subsidiary of W.W. Grainger, Inc. Previously, she spent more than 25 years at W.W. Grainger, Inc., including as Vice President and Associate General Counsel, advising on tech and ecommerce matters, data protection and security, crisis management, global sourcing, mergers and acquisitions, intellectual property, procurement, regulatory compliance, and risk management. Nolan earned a JD from the University of Detroit Mercy School of Law and a BA in international relations and French from Michigan State University. She also completed executive leadership training at Northwestern University’s Kellogg School of Management.
With more than 30 years’ experience advising short line and regional railroads, Sidman joined ARH on Jan. 1, 2013. He “has been a trusted advisor and integral member of the corporate leadership team, helping guide the company through sustained growth and reinforcing a strong foundation of governance and integrity,” according to Chicago-based ARH, whose six railroads combined handle two million-plus carloads annually in the U.S.
“Mark’s steady leadership and counsel have helped shape who we are today, and we are deeply grateful for his many contributions,” ARH CEO Peter Gilbertson said. “As we look ahead, Aimee brings the strategic mindset, operational discipline, and experience needed to help ARH scale responsibly and advance our mission in the years to come.”
ARH in 2025 appointed Mark Nuchurch as Manager of Safety and Compliance, a new role and title at the short line holding company; Michael Naatz as Chief Operating Officer; and Todd Nuelle as Chief Commercial Officer.
