Teryn joined ATKG in 2001 after returning to the US from living overseas and traveling for a year in between.

Originally it was to help out a friend for a bit, but Teryn quickly realized what a great firm this was, refused to leave, and became a partner in 2003.

Teryn graduated from the University of Arizona with a Bachelor of Science in Business Administration and then earned her Master of Business Administration (MBA) from the University of Manchester (UK). She honed her skills at Big Four firms both nationally and internationally and in industry working for a prior client’s family office but found her dream job when she became her own boss and surrounded herself with the great team at ATKG.

Teryn currently serves as the firm’s Chief Financial Officer. With 30 years of experience in mergers and acquisitions, real estate, oil and gas, closely-held businesses, family offices, retail and professional services, Teryn has a diverse range of experience in accounting, tax, and business advisory services. In addition, she enjoys using her strategic strength and being one of the creative drivers of change at the firm to find ways that ATKG can do things differently from its competitors.

Teryn is active in many organizations outside of ATKG. She is a current member and past board member of the San Antonio Chapter of Entrepreneurs Organization (EO). She is also a past board member of the National Association of Women Business Owners (NAWBO) and served as chair of their Million Dollar Roundtable program. She is currently chairing a committee for the Association of Corporate Growth – Central Texas Chapter and served as Committee Chair for the 2019 Private Equity Two-Step event. Teryn is also on the board of Women’s Global Connection, an organization whose mission is to promote women’s learning and leadership capacity locally and globally. She has been on mission trips to Tanzania and Peru with the organization. Teryn’s leadership in these organizations comes full circle to ATKG, as Teryn is known for bringing ideas back to the company to keep things fresh, challenge us, and keep ATKG at the top of its game.

With her involvement as a partner at ATKG and in the community, Teryn still makes time for her favorite hobbies. She is an avid traveler and even lived in South Africa before joining ATKG. Her many world travels make for great conversation at firm happy hours! She can’t pick a favorite destination but says hiking in New Zealand and cocktails on a great beach top the list! Most importantly, however, she loves spending quality time with her two greatest accomplishments, her daughters Nicole and Natalie.

‘‘Teryn's advice and consultation are sincere and personal to our needs. She is professional and always makes us feel like we are her utmost priority.’’

Amy M.

RevitalU, LLC

‘‘Teryn and the other team members who serve our company bring consistent, thoughtful, and efficient service and attention to our companies tax and financial needs.’’

A Client

‘‘Very personable and knowledgeable. Over the years, I have created great relationships with Teryn Grater, Diane White, and the seniors and managers on my account.’’

Melanie Fluitt

3 Star Daylighting, LP

‘‘Our child suffered a life-threatening illness last year. Teryn and Steve were compassionate, thoughtful, and proactive in keeping in touch when we were clearly focused in other ways, supporting our bone marrow drive and sending a gift for our son. It was much appreciated and beyond the scope.’’

A Client

‘‘Teryn is always available to answer my questions.’’

A Client

‘‘I appreciate the help Teryn and Katie provided in assisting me with my elderly mother’’

A Client

‘‘Teryn and David offered quick response time on partnership information and requested payments or distributions. Always willing to talk to me.’’

A Client

‘‘Teryn provided multiple family wealth management training resources to further my family's intergenerational wealth management goals.’’

A Client

‘‘Teryn and Kalyn are always at our side to help. Always.’’

A Client

‘‘Teryn is always quick to respond to questions and on top of the latest accounting rules.’’

A Client

‘‘Melanie, Teryn, and Sandy have clearly had my and my family's best interests at the forefront. I have had a 19-year relationship that has proved to be very beneficial to my family and me.’’

A Client

‘‘Melanie, Teryn, and Katie offer us confidence.’’

A Client

‘‘Eric and Teryn provide prompt service.’’

A Client

‘‘Teryn, Diane, and Kalyn provide awesome service. They stay abreast of the law and tax changes and that gives us extreme confidence.’’

A Client

CliftonStrengths® Signature Themes
(Top 5)

To learn more about how CliftonStrengths® is at the core of our culture and leadership development click here.


Teryn creates alternative ways to proceed. Faced with any given scenario, she can quickly spot the relevant patterns and issues.


Teryn loves the challenge of meeting new people and winning them over. She derives satisfaction from breaking the ice and making a connection with someone.


Teryn generally finds it easy to put her thoughts into words. She is a good conversationalist and presenter.


Teryn can make things happen by turning thoughts into action. She wants to do things now, rather than simply talking about them.


Teryn has a need to collect and archive. She may accumulate information, ideas, artifacts or even relationships.
Notable Accomplishments & Affiliations
Published Articles & Mentions
  • 2019 Women’s Global Connection, Board of Directors
  • 2019 Entrepreneurs Organization San Antonio, Member and former Board of Directors and Finance Chair
  • 2019 – ACG Central Texas Committee Chair – Private Equity Two Step
  • Texas Society of Certified Public Accountants, Member
  • 2018 – Mentor for San Antonio Business Journal Mentoring Monday
  • 2017 San Antonio Business Journal, Women’s Leadership Award
  • 2011 National Association of Women Business Owners, Million Dollar Roundtable Chair
  • 2010 Awarded the “Inspiring Texas Women” award from Sterling Bank
  • 2009 North San Antonio Chamber of Commerce, Athena Young Professional Award for Leadership
  • 2009 North San Antonio Chamber of Commerce, Small Business Leader of the Year