Donald  DeMuth

Donald DeMuth


Mighty Oak Strong America Investment Company

(717) 790-9001

Contact Me

Fee-Only Financial Planner located in Mechanicsburg, PA and serving the greater Harrisburg, PA area and clients nationwide


  • Fee-Only Financial Services
  • Comprehensive Financial Planning
  • Free Initial Consultation
  • Investment Management
  • Retirement Planning
  • Education Planning
  • Elder Care Issues
  • Estate Planning
  • Insurance Analysis
  • Charitable Giving and Trusts
  • Planning for Business Owners
  • Cash Flow and Budgeting


Visit Us

940 Century Drive
Suite B
Mechanicsburg, PA 17055

Fee-Only & Fiduciary

The National Association of Personal Financial Advisors (NAPFA) is the country's leading association of fee-only and fiduciary financial planners.

Donald DeMuth is a Harrisburg, PA Fee-Only Financial Planner located in Mechanicsburg and serving clients nationwide. Mighty Oak Strong America Investment Company specializes in providing objective financial planning to help clients build, manage, grow, and protect their assets through life's transitions. Donald DeMuth is a NAPFA-Registered Financial Advisor.

Donald DeMuth received his Master of Business Administration degree from the Wharton School of the University of Pennsylvania. He obtained his Bachelor of Arts degree from Franklin and Marshall College. Don has been a licensed Certified Public Accountant since 1975 and has since earned the American Institute of CPA's Personal Financial Specialist designation and Accredited in Business Valuation designation for appraisal of non-publicly traded businesses. He became a Chartered Financial Analyst charterholder in 2012. Don is also a Registered Investment Advisor with the Securities and Exchange Commission.

Don launched Mighty Oak Strong America Investment Company (MOSAIC) in 2002 and became a member of the National Association of Personal Financial Advisors in 2008. Don has been listed in the Financial Advisers for Doctors by Medical Economics every year since 2008. Since 2011, Dental Products Report has consistently named Don among Financial Advisers for Dentists.

Don has had faculty appointments to the Wharton School of the University of Pennsylvania, Pennsylvania State University, and Franklin and Marshall College, where he taught Investments and Portfolio Management courses. He has authored or co-authored approximately 50 articles in medical and dental publications.

Don is a lifelong baseball enthusiast, enjoys staying in shape, and seeing his grandson.

Don was recently featured in a Wall Street Journal cover story.


All too often, investment advisors are little more than salesman with only basic financial training or certification, whose primary skill is “closing” prospective customers. Regrettably, unqualified advisors still get paid by their clients, regardless of how much they are being overcharged or underserved. We find this situation as unacceptable as receiving health care at the hands of a so-called “physician” who hasn’t bothered to complete medical school.

MOSAIC prides itself as the home of deeply experienced professionals with difficult-to-obtain credentials, including: Chartered Financial Analyst (CFA) charterholder, Master of Business Administration (MBA), Certified Financial Planner® (CFP®), Certified Public Accountant (CPA), and Attorney at Law. We’re confident that we stack up well against other advisors and encourage our prospective clients to compare us (and our credentials) with any other firm before retaining us.

While no advisor can guarantee investment returns, we will always strive to meet or exceed a long-term rate of return consistent with a client's risk comfort level.