Cornerstone Accounting Services
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About Us
    Nathan B. Thomas, CPA
Nathan was born and raised in a small town outside of Albuquerque, NM. He moved to Denver, CO to attend Colorado Christian University where he graduated with honors, obtaining his BS in Accounting. He has been a CPA since 2005 and previously owned and operated the H&R Block Franchise in Pagosa Springs for 9 years, receiving numerous awards for operational excellence. He has extensive experience in individual income tax, small business bookkeeping, and payroll. He specializes in construction and real estate industries, assisting clients with tax and business operational issues. He has also successfully assisted clients with IRS problems such as non-filing and audits. Outside of work, Nathan enjoys spending time with his wife and children. As a family, they enjoy, camping, fishing, hunting, backpacking, and enjoying God’s creation. They are also very active in their local church's children's and music ministries.
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2800 Cornerstone Dr. B1 Unit 3
Pagosa Springs, CO 81147
Ph (970) 731-8080 Fax (970) 731-8181

a CPA firm with a solid foundation
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      Jason Peterson, CPA
Jason is originally from Minnesota and attended Moorhead State University where he received his BS degree in Accounting. He worked in banking for 20 years as an operations manager and loan officer. Jason joined Cornerstone accounting in February 2016. He is specializing in assisting small businesses with their tax and operational issues.  Jason and his family have lived in Pagosa since 2004. He is currently serving on the Archuleta County School Board and other various related charity boards.  
      Marianna Dwinell, Bookkeeper
Marianna was born and raised in Bishkek, Kyrgyzstan. She graduated from American University of Central Asia with a bachelor’s degree in I/O Psychology (Human Resources) at the top of her class. Marianna married in 2007 and moved to the US. She moved to Pagosa Springs with her husband Gene in 2010. In 2011, she joined the Cornerstone Accounting team, first working as an office manager and currently as a bookkeeper. Marianna speaks English, Russian and some Hebrew. She and her husband have three children and are actively involved in ministry at their local congregation. Outside of work, Marianna loves singing, playing instruments, dancing, taking photos, running, re-finishing furniture, remodeling, spending time with her family and being in the beautiful outdoors.
     Leslie Sheperd, Bookkeeper
​Leslie Shepard is a genuine Pagosa Springs native who escaped to Denver briefly to attend college. However, it wasn’t long before she was drawn back to Pagosa to be near family and friends and the heart of the mountains. Most recently, Leslie spent 6 years as your local banker, and, although she loved it, has decided to join the team here at Cornerstone Accounting. When Leslie is not working, her and her family enjoy cooking, gardening and enjoying the beautiful land we are so lucky to live in. She also spends as much time as possible playing with her goofy Lab and Kitties.
      Tara A. Hughes, PA
Tara graduated from Pagosa Springs High School.  During high school she worked part time as the accountant for a local architect firm.  She attended Fort Lewis College to receive a BS degree majoring in Accounting.  Tara has over ten years experience in a variety of areas including tax prep, bookkeeping, and payroll - specializing in small businesses.   Outside of work, if Tara is not with her family, she is serving the women of the community by coordinating an annual women's retreat. 
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    Shantilly Brewer, Office Manager
Shantilly was born and raised in Pagosa Springs, CO. After graduating Pagosa Springs High School she attended San Juan Community College in Farmington, NM, receiving her Nursing Assistant Certification. Shantilly recently moved back to Pagosa after living in New Castle, CO. She is currently a student at Colorado Mountain College, taking online courses to earn her Associates Degree of General Studies so that someday she can earn her Bachelors of Nursing to become a Nurse. Although she loved working as a Certified Nursing Assistant, Shantilly joined the team at Cornerstone Accounting December 2017, and is loving everything about it. She loves spending quality time with her son and daughter, enjoying fishing, hiking, camping, and exploring the beautiful outdoors of Colorado with them. When she is not working, she loves running, kickboxing, doing crafts, photography, painting, and refinishing furniture.
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