On March 1, 2018, the Board of Directors of Advanced Emissions Solutions, Inc. approved the creation of the Chief Financial Officer position and appointment of Greg Marken to this office, effective March 1, 2018. Prior to this appointment, Mr. Marken has served as the Company's Chief Accounting Officer. As Chief Financial Officer, Mr. Marken will assume the responsibilities as the principal financial officer, which principal financial officer responsibilities were filled by L. Heath Sampson, ADES' President and Chief Executive Officer.

Mr. Marken was also appointed Treasurer on March 1, 2018, an office held until such date by Mr. Sampson. Mr. Marken will continue to serve as the Secretary of ADES and as a director of ADA-ES, Inc., a wholly-owned subsidiary of the Company. Mr. Marken will continue to participate in the Company's short-term and long-term incentive plans for the Company's executive officers and his existing other compensation arrangements.

Mr. Marken, 36, has served as ADES' Chief Accounting Officer since June 2016, responsible for all aspects of ADES' U.S. Securities and Exchange Commission (“SEC”) reporting, technical accounting matters and various other accounting tasks. He previously served as ADES' Director of SEC Reporting and Technical Accounting since 2015 and led ADES' efforts to restate prior financial statements and bring ADES current with SEC reporting obligations. Prior to ADES, Mr. Marken held various positions, including Senior Manager, Assurance Services, at Ernst & Young, LLP from 2005 through 2015.

The position of Chief Accounting Officer was eliminated as of March 1, 2018.