A native San Antonian, Courtney attended The University of Texas at San Antonio and has over 15 years of experience in the legal field.

She has spent most of her career working as a litigation paralegal, helping take multiple cases to trial in both state and federal courts, but has also worked in the corporate, probate and estate planning legal fields.

Courtney loves the outdoors and her happy place is anywhere sand, surf and the chance to catch a nice fish are found. Although she left the Lonestar state for many years to live and travel across the country, the people (and let’s face it, the Tex-Mex food) brought her home again where she’s happy to live and enjoys being a part of ATKG’s Rock Star team.

‘‘Angie Stone and Courtney Mastin are very responsive. A great team.’’

A Client

‘‘Angie Stone and her team provided valuable forensic accounting services and excellent litigation support in some complex family law cases handled by our firm.’’

Alicia K.

Key Law Firm

‘‘Angie Stone and Courtney Mastin are prompt in their response to any inquiry our clients or I may have. Additionally, everyone at ATKG maintains a wonderful level of professionalism.’’

A Client

‘‘Angie, Ruth, and Courtney have worked days, nights, and weekends to be ready for hearings, trials, and mediation.’’

A Client

CliftonStrengths® Signature Themes
(Top 5)

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Courtney is intrigued with the unique qualities of each person. She has a gift for figuring out how different people can work together productively.


Courtney recognizes and cultivates the potential in others. She spots the signs of each small improvement and derives satisfaction from evidence of progress.


Courtney has contagious enthusiasm. She is upbeat and can get others excited about what they are going to do.


Courtney can sense other people’s feelings by imagining herself in others’ lives or situations.


Courtney works hard and possesses a great deal of stamina. She takes immense satisfaction in being busy and productive.