Greg Marken

ADA-ES, Inc. provides environmental technologies and specialty chemicals. The company was founded in 1997 and is headquartered in Highlands Ranch, CO.

The American Institute of Certified Public Accountants provides vocational education in accounting. The company provides services to the accounting community, regulatory bodies, and other organizations. It also operates in Jersey City, Washington, and Lewisville. It was founded in 1887 and is headquartered in New York City, NY.

Tinuum Group LLC manufactures and refines coal products. The company is based in Greenwood Village, CO. Richard C. Dowd has been the CEO of the company since 2015.

Ernst & Young LLP engages in the provision of accounting, assurance, tax, transaction, and advisory services. It specializes in the actuarial, analytics and big data, cyber security, accounting compliance and reporting, center for board matters, international financial reporting standards, country tax advisory, global trade, tax accounting, and climate change and sustainability. The company was founded in 1989 and is headquartered in New York, NY.