Estate Planning, Asset Protection, and Family Law

in St. George, Utah

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Trusted Help When

You Need It Most

Schedule a Consultation

Protect Your Hard Earned Money

Preserve Family Relationships

Control Probate Challenges

Protect Your Hard Earned Money

Preserve Family Relationships

Control Probate Challenges

Trusted Legal Guidance for Every Stage of Life

At Brindley Sullivan, we help individuals, families, and business owners in St. George protect what matters most. Whether you’re planning your estate, navigating probate, forming a business, or resolving family matters, our experienced attorneys provide clear guidance and proven strategies tailored to your needs.

Plan with confidence. Protect your future.

Family Law

From adoption and custody to divorce and guardianship, we guide families through life’s toughest transitions with clarity, compassion, and strength. Your family’s future deserves careful protection — and that’s what we deliver.

Estate Planning

We help individuals and couples create customized estate plans that protect assets, honor wishes, and bring lasting peace of mind. Plan ahead today to make life’s hardest moments easier for those you love.

Entity Formation

Whether you’re forming a business, trust, or partnership, the right foundation matters. We help you choose the best legal structure and set your future success in motion with confidence and protection.

Probate

Losing a loved one is hard enough. We help families navigate the probate process with clear advice, steady support, and protection of what matters — honoring the life and wishes of those who came before.

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Meet Our Team

Built on Experience. Focused on Your Future.

Founded in 2004 by Brent Brindley and M. Sean Sullivan, Brindley Sullivan was created with a simple mission: to provide families, businesses, and individuals in St. George with trusted, forward-thinking legal counsel.

Today, Sean Sullivan focuses exclusively on estate planning, probate, asset protection, business succession, fiduciary and beneficiary rights, guardianships, conservatorships, and charitable giving — helping you secure what matters most at every stage of life.

M. Sean
Sullivan

Brent M.
Brindley

Joy
Brindley

Shelbi
Post

Amy
Nicholls

Hear What Other People Have to Say

    
 
 
         
   Fran Johnston 
 
 
 
 Trustindex verifies that the original source of the review is Google. We worked with Sean Sullivan to get our trust set up and I’ve also recommended other family members to him. We all felt well taken care of. Sean was kind and very helpful when my husband died. Also his assistant Amy at the front desk is amazingly responsive, capable and kind.
  
 
        
   dustin cummings 
 
 
 
 Trustindex verifies that the original source of the review is Google. They took great care of making sure our needs and questions where well taking care of when they set up our trust. Thank you
  
 
        
   Anitra Cottrell 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a consultation with Brent Brindley and he was very kind, understanding, and knowledgeable. He checked in after our consultation to let me know he was available if needed. There was a misunderstanding on some things, and he was very kind in handling it.
  
 
        
   Casidee Ann 
 
 
 
 Trustindex verifies that the original source of the review is Google. My husband I have had the pleasure of working with Brent Brindley. He is honest, straight forward, but also empathetic. He knows his stuff!
  
 
        
   Adam Sedgwick 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brindley-Sullivan are the most trusted place/people I have ever met. I have been going there for almost 5 years. The fees are excellent. They do their job 110% ! I don’t think I’ll try to compare them with others. They are the best!
  
 
        
   Emma Wright 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brent is an extremely good attorney and I can’t recommend him enough!
  
 
        
   Kevin Cox 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had the best experience with Sean Sullivan.  Though estate planning has to be somewhere high on the list of least-pleasant experiences--I’m thinking root canals and colonoscopies--Sean actually made the process enjoyable.  No anesthetic required!  He’s extremely patient and thorough, and we are so happy that we followed up on our friend’s recommendation to work with him and his firm.  He even advised us on a related legal issue, all for the same quoted price, which was very reasonable.  Brindley Sullivan definitely deserves five stars.  Thanks, Sean!
  
 
        
   John Siggard 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have known Brent and Sean for years. They are both men of strong integrity and strong reasoning.
  
 
        
   Laura Randall 
 
 
 
 Trustindex verifies that the original source of the review is Google. We got help
  
 
        
   Britta Mansfield 
 
 
 
 Trustindex verifies that the original source of the review is Google. Andrew McCullough handled the estate for my father after a terminal cancer diagnosis. He was swift to jump into action, to make sure every detail was covered. I must tell you, at such a difficult time for my family, it was such a relief to have someone helping with the difficult stuff, just so we could make those final days count. The kind, thoughtful, compassionate approach he took through every step was invaluable to us. I cannot recommend his services enough.