In January 2004, Brent Brindley and M. Sean Sullivan left regional law firms and established the law firm of Brindley Sullivan, PLLC. Mr. Sullivan has limited his practice to Wills, trusts, probate, guardianships, conservatorships, asset protection, business succession, fiduciary duties and rights, beneficiary rights, and charitable giving.

Mr. Sullivan earned his Bachelor of Arts degree from Brigham Young University, in 1995, and his Juris Doctorate degree from the J. Reuben Clark Law School, Brigham Young University, in 1998. He is admitted to practice in all Utah Courts and the Federal District Court of Utah. He is a past president of the Southern Utah Estate Planning Council, of which he continues to be a member.


Brent Brindley has been a member of the Utah State bar for 25 years and has practiced in Washington County, Utah for 24 years. His practice is focused entirely on family related legal issues including divorce, custody, protective orders, juvenile court cases and adoptions. He has a well-deserved reputation for honesty, integrity and competence and uses a problem-solving approach in representing his clients, seeking resolutions that are fair and allow his clients to get through the difficulty and on with life. He is masterful at helping clients understand the legal system, their rights within the system, and the most efficient and effective way to navigate the treacherous waters of family law cases.


Andrew McCullough focuses his practice in the areas of probate, elder law, estate planning, estate and trust administration, and asset protection planning. Upon graduating from the J. Reuben Clark School of Law at BYU in 2015, Andrew joined the firm of Brindley Sullivan. Andrew enjoys assisting clients in planning for all of life’s events and counseling them in times of need.

Andrew also participates in numerous professional organizations including: the Utah Bar’s Tax, Probate, and Estate Planning Sections; the Salt Lake County and Southern Utah Bars; and serves on the board of the Southern Utah Estate Planning Council. He is admitted to practice in all Utah Courts and the Federal District Court of Utah. In his spare time, Andrew enjoys reading, golfing, and losing to his wife in tennis.


Shelbi began at Brindley Sullivan as the front desk receptionist in early 2016, after she returned from a semester abroad as an English teacher. At first it was just another job, but over the past four years, she has gained an interest in the estate planning area of law and enjoys learning how all of the pieces fit together. She became a Legal Assistant to Sean Sullivan and Andrew McCullough in the summer of 2019 and she loves it! She graduated from Snow Canyon High School in 2010 and has acquired a passion for travelling the world since then, taking her to 21 countries in total. In her free time, she enjoys reading, cooking healthy food, taking her kayak out, and studying homeopathic medicine.


Amy has worked in customer service for years and has found it a true joy working at Brindley Sullivan.

There is always something new to learn in the “law world” and getting a firsthand lesson in it is something she finds fascinating.  Over the years Amy has discovered a love of traveling, film-making, and trying to crochet herself a new wardrobe.