Stephen C. Koester, CPA


Steve Koester is a long-time partner of Gray Hunter Stenn LLP. He works with the partners and staff to promote client satisfaction and growth and development of the firm.


Steve heads the firm’s quality control oversight and helps the firm strive for continuous improvement in quality and efficiency in the tax and audit practice.


Experience and Expertise

Mr. Koester has dealt extensively with the firm’s manufacturing, non-profit, hospital and retail clientele. Mr. Koester has been involved with audit, tax and management advisory services to non-profits and large privately held companies. Mr. Koester has spent significant time with internal control review. Mr. Koester has been involved in the audits and filings of area colleges and universities, mental health organizations, and other non-profits, including Single Audit engagements.


Professional Affiliations

  • American Institute of Certified Public Accountants
  • Illinois CPA Society



  • Bachelor of Science in Accounting, Quincy College (now Quincy University)
  • CPA licensed in the states of Illinois and Missouri


Practice Areas

  • Audit & Accounting
  • Tax Services
  • Management Services