Gregory Sinning
Gregory Sinning
Estate and Probate Attorney
EDUCATION
- Belhaven University
- Bachelor of Accounting – 2010
- University of North Dakota
- Juris Doctorate – 2019
BAR ADMISSION
- Arizona – 2020
PROFESSIONAL AND LEGAL ASSOCIATIONS
- State Bar of Arizona
- Family Law Section Member, since 2022
- Maricopa County Bar Association
- Family Law Section Member, since 2022
NOTABLE CONFERENCES & SEMINARS
- AAML National Family Law Conference, attendee, 2024, 2025
- AAML BVR National Divorce Conference, attendee, 2022
- Family Law Institute featuring For Better or For Worse, attendee, 2022, 2023
- MCBA Bi-Annual Speed-Networking with Judges Events, attendee, since 2022
HONORS AND AWARDS
- Super Lawyers Rising Stars
- CALI Award, Trial advocacy
- Best Oralist, Legal Writing and Advocacy
ADDITIONAL MENTIONS
- Executive Managing Editor, Law Review
- Executive Publication Editor, Law Review
- Treasurer, Veterans Law Student Association
- Extensive Trial Experience
Gregory Sinning
Estate and Probate Attorney
A believer that hard work and determination can lead to amazing results, Greg has carried that approach through every stage of his career—and now brings it to helping clients plan for the future and protect what matters most.
Greg grew up in Brandon, Mississippi, and graduated from Belhaven University with a Bachelor’s Degree in Accounting. After graduation, Greg worked for a regional moving company as its office manager. However, Greg found his calling for the law when he made a career change, taking a position as a paralegal for a Jackson, Mississippi-based tax law firm. Greg used the skills he learned as a paralegal, working closely with clients, to further his legal career. He then finished his legal education at the University of North Dakota School of Law. During law school, Greg was a member of Law Review and represented his law school at a national appellate moot court competition. He also clerked for a Maricopa County Superior Court Judge, where he gained hands-on experience inside the courtroom.
After earning his Juris Doctorate, Greg began his legal career in employment law, assisting people through tumultuous and uncertain times. There, he honed his skills as a negotiator, helping numerous clients obtain severance packages after unexpected job loss. Greg then transitioned into commercial contract law, where he developed a strong foundation in litigation and advocacy, spending significant time in the courtroom and gaining insight into disputes.
Greg later focused his practice on family law, guiding clients through some of the most personal and emotionally complex challenges they will ever face. This experience sharpened his ability to manage expectations, navigate sensitive family dynamics, and develop practical, forward-looking solutions tailored to each client’s circumstances.
Today, Greg applies that same perspective to estate planning. His background in family law and tax law gives him a unique understanding of how conflict can arise, and how thoughtful planning can prevent it. He works closely with clients to create clear, effective estate plans that protect their families, preserve their assets, and provide peace of mind. Drawing on his experience in negotiation, litigation, and client counseling, Greg approaches estate planning with both precision and empathy, helping clients make informed decisions about their futures to help give them peace of mind.
When Greg is not working with clients to plan and protect their legacies, he enjoys spending time with his family. They enjoy traveling together and exploring Arizona. When he can, Greg can be found teeing it up on one of the valley’s numerous golf courses.
Client Review
“Amazing work and amazing job! Did everything perfect and the ruling went amazing . I recommend Greg 10/10. Thank you again for the help and constant communication threw out the case.”
EDUCATION
- Belhaven University
- Bachelor of Accounting – 2010
- University of North Dakota
- Juris Doctorate – 2019
BAR ADMISSION
- Arizona – 2020
PROFESSIONAL AND LEGAL ASSOCIATIONS
- State Bar of Arizona
- Family Law Section Member, since 2022
- Maricopa County Bar Association
- Family Law Section Member, since 2022
NOTABLE CONFERENCES & SEMINARS
- AAML National Family Law Conference, attendee, 2024, 2025
- AAML BVR National Divorce Conference, attendee, 2022
- Family Law Institute featuring For Better or For Worse, attendee, 2022, 2023
- MCBA Bi-Annual Speed-Networking with Judges Events, attendee, since 2022
HONORS AND AWARDS
- Super Lawyers Rising Stars
- CALI Award, Trial advocacy
- Best Oralist, Legal Writing and Advocacy
ADDITIONAL MENTIONS
- Executive Managing Editor, Law Review
- Executive Publication Editor, Law Review
- Treasurer, Veterans Law Student Association
- Extensive Trial Experience
EXCELLENT Based on 391 reviews Posted on matt harrellTrustindex verifies that the original source of the review is Google. Jason Karpel at DM assigned his team of David Campbell and Leah Dodd, which did an amazing job, being very attentive and making themselves available anytime we needed a conversation. This team worked out everything I needed and highly recommend this firm for anything !!! Thank you DM Cantor Team !Posted on Paul ZellnerTrustindex verifies that the original source of the review is Google. Great lawyers!!!Posted on SebTrustindex verifies that the original source of the review is Google. The legal team at DM Cantor is absolutely phenomenal. They helped me win my case and made me feel at home throughout the whole process. I am extremely grateful I chose DM Cantor for legal help, and I cannot recommend them enough!Posted on Adam FloodTrustindex verifies that the original source of the review is Google. Fantastic office, clean, and amazing artwork. Plus final boss sour!Posted on Kevin McDermottTrustindex verifies that the original source of the review is Google. I worked with Nick Boca and Robyn McCraw. I felt I was in the best of hands from the beginning. They were clear and upfront at all times with their communication and instruction. Any divorce is a difficult time, and Nick and Robyn understand that. Their compassion for my situation and professionalism in how they handled my case stood out the most. I would highly recommend their services to anyone going through a difficult divorce. KMPosted on PeggyTrustindex verifies that the original source of the review is Google. Cantor Law Group came as a recommendation from a family friend, and I am so grateful that this led me to speak with Nicholas Boca. Nik represented me in a complicated divorce which detailed a substantial claim of waste that spanned my 25-year marriage. He was very straightforward and honest and worked purposefully on my behalf at all times. He was empathetic to my situation and found ways to navigate difficult challenges unique to my case. Perhaps most importantly, he understood the importance of bringing closure to my situation and did his best to avoid unnecessary legal expenses. His methods to find resolution required wisdom and experienced practice of law. My heartfelt gratitude also extends to Robyn and Amanda. This was a team effort. Amanda’s knowledge of law, Robyn’s organizational skills and instinctive nature were invaluable. My “team” at Cantor Law Group cared. My case mattered, I mattered, my family mattered. From the front desk to the billing department, everyone handled my inquiries and needs without delay. Each person I interacted with seemed to know me personally and I felt reassured they were all working together to achieve the best possible outcome. Cantor Law Group has an excellent reputation amongst the experts. It was extremely reassuring knowing that the work ethic and professionalism of Cantor Law Group is respected by both the experts and the court. I would HIGHLY recommend Cantor Law group.Posted on Ayoub AbouriTrustindex verifies that the original source of the review is Google. Met with Jason for a consultation. He was very honest and upfront. I appreciate the advice and information. I’m very happy I came in and even though I did not hire them I highly recommend them.Posted on Mike LaForestTrustindex verifies that the original source of the review is Google. All the attorneys are exceptional and they all work collaboratively on your case. While I worked closely with David, the other attorney's where always up to date and provided unparalleled guidance. Bottom line, they are a cut above and they deliver. You get what you pay for. If it matters, talk to DM Cantor.
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