Skip to main content


John Oeltjen is a widely known and respected professional, offering more than 40 years of business leadership and consulting experience. He began his 30-year public accounting career with a “Big 4” firm, where he served as lead partner for the St. Louis Regional Middle Market practice, leading its rapid revenue growth and expansion. John also holds 12 years of experience in the private sector, where his roles included President, Chief Operating Officer and part owner in various manufacturing and distribution businesses that saw significant increases in operational efficiencies and profitability under his watch.

With this unique experience, John is able to leverage his knowledge and experience of internal controls, lean manufacturing and process improvements, along with his expertise in strategy development, corporate finance, information management, and other specialty services to help clients improve their business.  His current areas of concentration include risk advisory and attestation services, merger and acquisition services, corporate strategic planning, transition planning services. process improvement, operational efficiency, and information technology services.


Organizations & Awards

Professional Organizations
  • American Institute of Certified Public Accountants (AICPA)
  • Missouri Society of Certified Public Accountants (MSCPA)
  • Peer Review Acceptance Board for American Institute of Certified Public Accountants (AICPA)
  • Accounting and Auditing Committee for Missouri Society of CPAs (MSCPA)
  • Allinial Global Manufacturing and Distribution Community of Practice – Co-Chairman
  • Turnaround Management Association
  • Association for Corporate Growth/ St Louis
Civic Organizations
  • Association for Corporate Growth
  • Southern Illinois University Foundation – Board of Directors
  • Southern Illinois University-Edwardsville Foundation – Audit Committee Chairman


  • Bachelor of Science in Accounting, Southern Illinois University-Edwardsville
  • Executive Management Program, Stanford University
  • Executive Management Program, Washington University
  • Certified Public Accountant (CPA) – Missouri & Illinois
  • Certified Manufacturing Professional (CMP)
  • Lean Six Sigma Green Belt
  • Certified Global Management Accountant (CGMA)

Speeches & Publications

John is a preferred speaker for various local and national organizations. He has also presented at a wide variety of colleges and universities for educational purposes. Please call 314.862.2070 or contact us to book John for your event.

Speaking Topics
  • Manufacturing & Distribution
  • Process Improvement
  • Profitability Enhancement
  • Corporate Renewal
  • Mergers & Acquisitions
  • Strategic Planning