Mark J Peniston CPA LLC is a CPA firm based in Colorado Springs, CO. The firm started in San Antonio, Texas in 2015 and relocated to Colorado Springs in 2021. It is licensed to practice public accounting by the Colorado State Board of Accountancy.

The firm works with individuals and small businesses, using software and technology to provide services locally and across the United States. Its stated service areas include tax preparation, tax planning, bookkeeping, payroll, sales tax, new business formation, accounting services, and IRS notice or audit help.

Mark J. Peniston, CPA has accounting experience across banking, financial services, insurance, real estate, non-profit, and defense contracting, with 15+ years of experience noted in the source materials.