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McDemus & Co. CPA

If you are looking for a blend of personal service and expertise, you have come to the right place! We offer a broad range of services for government agencies, business owners, executives and independent professionals. Our rates are affordable. We are experienced and friendly.

Company Profile Capability Statement

Government Services

We pride ourselves on being very efficient, affordable, and of course, extremely discreet. Learn more.

Business Services

We take care of your business for you, so you can get back to the job of running your business. Learn more.

Services For Individuals

You get one-on-one guidance that helps manage risk and improve performance. Learn more.

Tax Services

We pride ourselves on being very efficient, affordable, and of course, extremely discreet. Learn more.

Accounting is what we do best, you're busy enough with the rest


McDemus & Co., CPA is a full service Certified Public Accounting and Management Consulting firm, registered as a domestic Virginia limited liability corporation. We specialize in accounting, auditing, taxation, risk assurance and compliance, management consulting, budgeting, and internal control assessment. McDemus & Co. CPA is SBA 8(a) and DBE (VA) certified. We are professional, experienced, and affordable. Our goal, always, is to exceed your expectations.

Our Partners have over 65 years of combined experience in all aspects of Accounting, Auditing, and Tax services. The Managing Partner; Ume Onwuka has served in various auditing, accounting, and consulting capacities in industry, government, and public accounting. He served as District Audit Manager to the Northern Virginia District of the Virginia Department of Transportation. Mr. Onwuka served with the Governor’s Best Practice Team reviewing agency processes and controls to identify opportunities for improvement under the direction of the Chief of Staff. In public accounting, he led several audits of government clients such as the Federal Communications Commission, the Metropolitan Washington Airports Authority, the City of Richmond, and other government entities.

In addition to our capabilities, we maintain teaming arrangements with other CPA firms in the Metropolitan Washington area. These arrangements provide us the ability to respond to any service opportunity presented to us and allows us to quickly and effectively source the best qualified candidates to respond to the needs of our clients.

Our core competencies include but is not limited to:

  • Financial, Performance, Fraud, and Forensic Audits
  • Contract Closeout, and Construction Audits
  • Grants & Financial award audits; Accounts Reconciliation & Budgeting
  • Due Diligence Review and Examination
  • A-133 Audits (Yellow Book)
  • Internal Control Review and Risk Assessments (including A-123 audits), SOX 404, COSO Review/Reporting
  • Recapture Audit (duplicate payments); and Audit Support, Audit Readiness/Remediation

We can also assist if you find yourself on the wrong side of the IRS. We're here to help you resolve your tax and accounting problems and put an end to the misery that the IRS can put you through while helping you meet regulatory and good business practices that help you grow.

Please call us today at (703) 270-1006. Thanks for visiting!

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(703) 270-1006

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