Our Story

I started my CPA firm just over 25 years ago. Since that time, my firm has grown steadily, and I have added both partners and staff. I am grateful for the growth, but I am sure you can testify that growing an accounting firm creates a myriad of challenges. From my personal experience, doing the accounting work is not the hard part.  The hard part is running the business while trying to keep it from overwhelming us.

That’s what led me to design and create an in‐house time and billing software application several years ago. Over time, the software has become the hub around which the rest of the firm operates. The software has helped our firm in many ways. We stay on task via the prioritized task lists. We capture more of our time for billing purposes. Invoicing is greatly simplified. Tracking appreciation and discounts by staff member helps us evaluate overall performance much better than before.  

We have prepared the software to become a cloud‐based solution to help other CPA firms. Since we figuratively walk in your shoes, we know what you and your firm are going through. And we believe FirmTamer can help you both take control of and better manage your firm to achieve better results both professionally and personally. In my experience, less time at the office means more time at home with my family doing what I want to do. 

I truly believe that using FirmTamer will allow you to work smarter, not harder, by taming your firm.



Jerry Walker CPA, founder of FirmTamer

Our Leadership

Jerry Walker


After graduating Magna Cum Laude from Texas Wesleyan University in 1991 with a B.B.A. in Accounting, Jerry Walker worked for the international accounting firm of Coopers & Lybrand. He served as a financial statement auditor, an information systems auditor, and computer consultant. During his tenure with C&L, he received his license as a Certified Public Accountant and Certified Information Systems Auditor. Later, he served as a tax preparer and computer consultant for a local accounting firm. In 1996 he started his own firm to provide solutions for small businesses and tax preparation for individuals. Since 2010, Jerry has been designing and refining the FirmTamer practice management software to meets the needs of his own firm.

Jerry is a lifelong resident of Parker County, Texas, where he and his family attend Beulah Baptist Church.

Kevin Chessher


After graduating Magna Cum Laude with his BS and MS in Accounting from the University of North Texas in 1988, Kevin worked for the international accounting firm of Ernst & Young as an auditor. During his time at Ernst & Young, he earned his license as a Certified Public Accountant. After working in a small bank as an Investment and Banking Officer, Kevin spent the next 20+ years serving on the staff of two large churches. During this time, he also earned his MBA in Finance from the University of North Texas. Kevin began working at Coburn & Walker CPAs, PC in 2017, and he became a partner in Coburn, Chessher & Walker CPAs, PC in 2020. 

Kevin married Cindy in June of 1989, and they have three children. He is a native Texan and lives in Tarrant County, where he and his wife attend Eagle’s View Church.

Clayton D. Coburn


Shortly after graduating with his BBA in Accounting from the University of Texas in 2005, Clay began working for Jerry L Walker CPA, PC. He received his license as a Certified Public Accountant in 2014, and he became a partner in Coburn & Walker CPAs, PC in 2016. Clay provides accounting and tax services to business clients. He also provides on-site and in-office QuickBooks consulting and training.

He and his beautiful wife welcomed their first child in 2013 and their second child in 2016. Clay is a lifelong resident of Parker County, Texas, where he and his family attend Greenwood Baptist Church.

Zach Mueller

Lead Developer

Zach began working in the SaaS industry in 2015. Since then, he has worked for several SaaS companies. After gaining experience in the field, he decided to return to school and earn a degree in Computer Science. In 2021, he graduated from Tarleton State University with his BS in Computer Science. During his time there, he worked with Tarleton Faculty on researching optical flow fingerprints, and his research was published in Proceedings of the 16th International Joint Conference on Computer Vision.

Since graduation, Zach has worked with the rest of our team to create FirmTamer, making sure that it can work not only for Coburn, Chessher & Walker CPAs, but also for any CPA firm, regardless of their workload or size.

Outside of work, Zach still tinkers with his own coding projects, but he prefers to spend his time with his family, including his two dogs, Lyla and Maggie.