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Meet Our Team

The team at Karen Collom, CPA, works together to create sustainable solutions for our clients that allow for client growth and change. Building relationships is tantamount to what we do. Our clients entrust us with their financial security, and we never consider them just a number.


Karen Collom

Karen Collom is a Certified Public Accountant and the owner of Karen Collom, CPA. She is a Quickbooks ProAdvisor, is Quickbooks Online Certified, and is on the ProTax Customer Council for Intuit.

She started her firm to provide Individual and business tax preparation and consulting, with a specialization in coaching start-up entrepreneurs as they journey through the first two years of their company's evolution. 

Prior to starting the firm in January 2000, she served as a Chief Financial Officer (CFO) and Treasurer for Lexicon Information Concepts. She also served as the Business Manager for Our Lady of Angels Catholic Church in Allen, Texas.


  • Master’s Degree in Accounting & Auditing

  • Bachelor of Science - Accounting

  • University of North Texas     




Mary Salazar

Quickbooks Online Pro Advisor

Mary joined Karen Collom, CPA in 2015. She is a Quickbooks® ProAdvisor certified in Quickbooks® Online. She brings over 30 years of financial and accounting experience to the team with her role, including tax, accounting, human resources and financial analysis. Prior to her current role, Mary volunteered for the IRS, and held a financial leadership role at Accenture, a multi international management consulting technology services and outsourcing company. In addition, she served in a leadership capacity at Affiliated Computer Systems, an information technology service and business process outsourcing company. Her focus was budgeting, policy development, cost analysis, and acquisition integration.


  • Bachelor of Science in Business Administration
    Concentration: Accounting 

  • Midwestern State University




Teresa Michelsen
Office Manager

Quickbooks Online Pro Advisor

Teresa Michelsen joined Karen Collom CPA in March 2019 as a bookkeeper and office manager. She is a Quickbooks® ProAdvisor certified in Quickbooks® Online. Teresa has over 11 years of experience in accounting, bookkeeping, A/P, payroll and human resources previously working with Needham Roofing and Blue Cross Blue Shield of Texas. She brings a wealth of knowledge in these areas to the team. Teresa believes in giving back to her community and takes a very active role in the organizations she supports. She has held numerous volunteer leadership roles and chaired events and committees in her local community


  • Bachelor of Business Administration in Human Resource Management

  • Texas A&M University – Commerce



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Leah Stradley

Quickbooks Online Pro Advisor


Leah joined Collom CPA as an accountant in April 2021. She is a Quickbooks® ProAdvisor certified in Quickbooks® Online.

She has over 25 years of experience in accounting. Prior to joining Collom CPA, Leah served as Director of Accounting at a consulting firm.

She has worked with Quickbooks since 2007, managing daily accounting functions, financial statements, monthly close, and vendor payments in both for-profit and non-profit businesses.

Outside of the office, Leah has used her accounting skills to serve the following charities as volunteer Treasurer for:

  • The Young Men’s Service league

  • The National Charity League- Golden Corridor Chapter

  • The Plano Senior High Swim Booster club


  • Bachelor of Business Administration in Accounting

  • University of William and Mary



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