Mary Frontczak


Mary Frontczak joined Compass Minerals as chief legal officer and corporate secretary in November 2019. She was named chief legal and administrative officer and corporate secretary in February 2020. In this role, Ms. Frontczak oversees all human resources and legal affairs for the company, including employee relations, organizational alignment, corporate governance, commercial matters, merger and acquisition activity, litigation oversight, corporate compliance, intellectual property, and labor and employment law. Ms. Frontczak also leads the company’s focus on ensuring a diverse and inclusive workplace.

Ms. Frontczak brings to Compass Minerals nearly three decades of legal, governance and management experience in both the mining and agribusiness sectors. Prior to joining Compass Minerals, Ms. Frontczak served as senior vice president and general counsel at POET, an ethanol and other bio-refined products producer. Prior to POET, she headed the legal department at Bunge North America, an agribusiness and food ingredient company. Additionally, she held various leadership and legal positions at Peabody Energy Corporation and The May Department Store Company, as well as managing commercial litigation matters with private firms early in her career.

Ms. Frontczak holds a Bachelor of Arts from Saint Louis University and a Juris Doctor from Saint Louis University School of Law. She earned a Master of Business Administration from Washington University John M. Olin School of Business in St. Louis, Missouri.