Serving Family Needs With Compassion and Strength

Compassionately serving your needs while aggressively protecting your interests

Practicing with Compassion & Strength

For more than 20 years, Dianne Sullivan has been serving the needs of families all across the Valley, with compassion and strength. While aggressively protecting your personal interests, she will help you through some of the most difficult times in your life.

As a sole practitioner of Family Law, her understanding approach allows Dianne to serve your family with strength guiding you through your case with expertise

I have a thorough understanding of Arizona law. With exceptional legal skills, practical solutions, and professional integrity, Dianne Sullivan works hard to help you get the best possible results in the following practice areas:

  • Divorce
  • Child Custody
  • Child Support
  • Financial Disputes
  • Spousal Maintenance Agreements
  • Estate Planning
  • Family Trusts

Once you speak to Dianne, you'll understand why her approach has brought such positive outcomes to so many families. Call now to schedule your consultation.

You Want a Firm and Fair Lawyer Serving Your Needs

As one of the strongest Family Law litigators in the Valley, with decades of courtroom experience to back it up; Dianne Sullivan possesses an unwavering compassion for families and the laws that govern them. This mindful approach to both has helped her practice the law fairly and justly.

“When I represent families, I look at them holistically, beyond simply being another case to win, at the heart is a family in need. Families who have entrusted me with their immediate future, emotional or sometimes physical health, and financial well-being. My goal is to deliver a mindful process to heal their family by resolving the issue as quickly and smoothly as possible, in the most respectful way.” ~ Dianne Sullivan

Not Your Average Divorce Attorney

While being a first-rate litigator will help you through the legal process, Dianne Sullivan also understands when circumstances break down in a marriage and the prospect of Divorce is upon you, it can be one of the most challenging and stressful times for you and your family – especially when dealing with the impact it has on children.

Dianne's upbeat positive spirit aims to ease the discomfort, be mindful of your emotions, and offer empathy and understanding to all who will be affected. With kindness and warmth to encourage you to see the positive, healthy future waiting for you right around the corner. One conversation with Dianne and you'll feel that positive spirit.

Practice Areas


Child Custody

Paternity Cases

Spousal Maintenance

Estate Planning

Sullivan Law Office Is Here for You

At Sullivan Law Office, I focus on Divorce, Child Custody, Paternity Cases, Spousal Maintenance, and Estate Planning and I am here to listen to you and help you navigate the legal system.

Contact Me Today

Dianne Sullivan is committed to answering your questions about Divorce, Child Custody, Paternity Cases, Spousal Maintenance, and Estate Planning issues in Arizona.

I'll gladly discuss your case with you at your convenience. Contact me today to schedule an appointment.

Mesa Office
3707 E. Southern Avenue
Mesa, AZ 85206
Peoria Office
16165 N. 83rd Ave., Suite 200
Peoria, AZ 85382
1 more location