Orion Engineered Carbons S.A. reported the appointment of Bob Hrivnak as Chief Accounting Officer (CAO) of the company. Hrivnak has over 30 years of experience as an accomplished financial executive with a tremendous track record in leading corporate finance and accounting control functions of public companies. A Certified Public Accountant (CPA), who started his career as an auditor with KPMG, Bob joins the company from Clearwater Paper Corp. where he served as CFO and CAO. Hrivnak will succeed Andre Schulze Isfort, who had a distinguished nine-year tenure as CAO of the company highlighted by several key milestones, including leading the accounting function through Orion's transition from private to public ownership, the conversion of the company's financial statements from IFRS to U.S.