Partners, principals and associates

Photo coming soon St. Charles

2460 Executive Drive
St. Charles, MO 63303




John Oeltjen, CPA, CGMA, CMP


John Oeltjen is a director with over 40 years of experience in providing business leadership and consulting services. John is a widely known and respected professional. Clients appreciate his practical experience and business solutions to help them overcome their challenges and meet their goals.


  • Certified Public Accountant
  • Certified Manufacturing Professional (CMP)
  • Certified Global Management Accountant (CGMA)

Professional memberships and activities

  • American Institute of Certified Public Accountants (AICPA) – Member
  • Missouri Society of Certified Public Accountants (MSCPA) – Member, Peer Review Committee and Technical Interests Committee


Business consulting services

Areas of Focus

  • Merger and acquisition transaction advisory services
  • Transition planning services
  • Corporate strategic planning services
  • Corporate finance services
  • Process improvement services
  • Attestation services


Southern Illinois University
  • Bachelor of science degree in business with a specialization in accounting
Executive Management Programs
  • Stanford University
  • Washington University of St Louis