Certified Appellate & Family Law Specialist

John Sylvester

Meet John

John T. Sylvester is a Certified Appellate Law Specialist and Certified Family Law Specialist whose practice focuses on family law appeals, writ proceedings, and appellate strategy consultation for trial counsel. He has served as lead appellate counsel in matters involving reversals, writ relief, and published appellate opinions, and regularly advises trial attorneys on issue preservation, statements of decision, stays pending appeal, postjudgment motions, and appellate procedure. His work bridges trial-level family law expertise with appellate specialization in custody, domestic violence, support, property division, and attorney fee matters. Clients appreciate working with John because he has handled both sides of the process, complex family law trials and the appeals that follow, which has given him a unique understanding of how a ruling gets built and how it comes apart under appellate scrutiny.

Career Overview

Attorney Specialties: Family Law Appeals & Writs

John has practiced law in California since 2014, beginning as an associate attorney at the Law Offices of David C. Beavans, APC, where he handled complex family law trial litigation including dissolution, custody, domestic violence, support, and property matters. In 2021, John joined Cage & Miles, LLP, as our Lead Appellate Attorney, where he now focuses on family law and civil appeals, writ proceedings, and appellate strategy consultation for trial counsel. He became a Certified Family Law Specialist in 2020 and a Certified Appellate Law Specialist in 2024.

He has served as lead appellate counsel in matters resulting in reversals, writ relief, and nine published appellate opinions. His practice concentrates on high-stakes family law appeals raising technically complex and often unsettled questions — including the scope and rebuttal of the Family Code section 3044 custody presumption (Abdelqader v. Abraham (2022) 76 Cal.App.5th 186), the appealability and reach of domestic violence restraining orders as to protected children (J.H. v. G.H. (2021) 63 Cal.App.5th 633), and conflicts between voluntary declarations of parentage and competing presumed-parent claims (Steven N. v. Priscilla C. (2026) 119 Cal.App.5th 639). Several of these matters produced published opinions that now govern how trial courts across California decide custody, parentage, and restraining order disputes.

Representative Matters & Methodology

John's approach to representing clients is meticulous. Appellate work rewards precision, accurate record citations, disciplined briefing, and arguments framed within the applicable standard of review, and he holds every brief to that standard. Representative matters include his published appellate cases:

‍In re Marriage of Jessica & Sammer Z. (2026) ___ Cal.App.5th ___ (domestic violence and Family Code section 3044 presumption)‍
Steven N. v. Priscilla C. (2026) 119 Cal.App.5th 639 (voluntary declaration of parentage; presumed parentage)‍
In re Marriage of A.M. & R.Y. (2025) 110 Cal.App.5th 1115 (domestic violence temporary restraining order)‍
In re Marriage of Tara & Robert D. (2024) 99 Cal.App.5th 871 (custody trial continuance after withdrawal of counsel)‍
North Coast Village Condo. Assoc. v. Phillips (2023) 94 Cal.App.5th 866 (workplace violence and civil harassment restraining orders)‍
Abdelqader v. Abraham (2022) 76 Cal.App.5th 186 (domestic violence and Family Code section 3044 presumption)‍
J.H. v. G.H. (2021) 63 Cal.App.5th 633 (domestic violence restraining order; protected children)‍
Balla v. Hall (2021) 59 Cal.App.5th 652 (anti-SLAPP; political defamation)‍
County of San Diego v. P.B. (2020) 55 Cal.App.5th 1058 (child support guideline timeshare)

Thought Leadership

John is a respected voice in the family law and appellate community who regularly speaks to bar associations and practitioner groups on appellate practice, domestic violence, fee and sanction motions, and annual family law case and statutory developments. He also contributes to the community by writing for the ACFLS Specialist, serving on the ACFLS Amicus Committee, and mentoring newer practitioners, work recognized with the Michael C. Shea Teacher-Mentor Award in 2023.

Publications

"Pleading Specificity and Due Process Lessons from In re Marriage of Jenkins," ACFLS Specialist (Association of Certified Family Law Specialists) — forthcoming, Fall 2026
"The Everchanging Domestic Violence Landscape," ACFLS Specialist — Spring 2024

Speaking Engagements

Fee Fi Fo Fum: A Practitioner's Playbook for Prevailing on Fee & Sanction Motions — San Diego Family Law Bar Association, May 2026
Family Law Experts Series: 2025 Family Law Recap — Cage & Miles, LLP, January 2026
Family Law Experts Series: 2024 Family Law Recap — Cage & Miles, LLP, January 2025
Airtight Rulings: Best Practices to Survive Appellate Scrutiny — San Diego Family Law Bar Association, February 2024
Family Law Experts Series: 2023 Family Law Recap — Cage & Miles, LLP, January 2024
Nuts & Bolts of Civil State Court Appeals — San Diego County Bar Association, October 2023
Domestic Violence Updates & Appellate Tips — North County Bar Association, June 2023
Do This, Not That: Review of 2022 Family Law Cases & Statutes — San Diego Family Law Bar Association, December 2022
Help Me Help You: Tips for Preparing a Family Law Appeal — North County Certified Family Law Specialists, October 2022
General Discovery—Issues and Pointers — San Diego Volunteer Lawyer Program Paralegal Training Program, October 2021
Demystifying Family Law Appeals — San Diego County Bar Association, Appellate Practice Section, June 2021

Honors & Awards

Recommended Family & Divorce Lawyer (San Diego), Doyle’s Guide, 2026‍
Rising Stars Award, Appellate & Family Law, Super Lawyers, 2018–2026
Michael C. Shea Teacher-Mentor Award, SDFLBA, 2023

Professional Associations & Community Involvement

Association of Certified Family Law Specialists (ACFLS), Member, Amicus Committee
California Lawyers Association (CLA), Member
Los Angeles County Bar Association (LACBA), Member
San Diego Appellate Inns of Court, Associate
San Diego County Bar Association (SDCBA), Member, Past Chair of Appellate Section
San Diego Family Law Bar Association (SDFLBA), Member
San Luis Obispo County Bar Association (SLOCBA), Member
Past Chair, Appellate Practice Section, San Diego County Bar Association
Member, Amicus Committee, Association of Certified Family Law Specialists
Volunteer Attorney, Civil Appellate Self-Help Workshop
Volunteer Attorney, Access to Appellate Justice Program
Volunteer Attorney, Family Violence Appellate Project
Frequent CLE presenter on appellate practice, domestic violence, and family law developments for SDCBA, SDFLBA, North County Bar Association, and other bar organizations
Contributing author, ACFLS Specialist

Outside of Practice

Outside of practice, John lives in idyllic San Luis Obispo County with his wife and dog. He spends most of his free time running and training for marathons. Logging miles out on the open road is where some of his best legal theories are crafted.

LICENSES & CERTIFICATIONS

Certified Legal Specialist (Appellate Law), State Bar of California, 2024–Present
Certified Legal Specialist (Family Law), State Bar of California, 2020–Present
Attorney Licensee, State Bar of California 2014–Present
Admitted to Practice, U.S. District Court, Central District of California, 2014–Present
Admitted to Practice, U.S. District Court, Southern District of California, 2014–Present

ATTORNEY SPECIALTIES

Family Law Appeals & Writs

EDUCATION

Juris Doctor, magna cum laude, Thomas Jefferson School of Law, 2014
Bachelor of Arts, English Literature, San Francisco State University, 2011

Services Offered

Family Law Appeals & Writs

Challenge a family court decision with confidence. The appeals process helps identify legal errors and pursue a fair outcome.

Locations Served

San Diego, CA

Los Angeles, CA

Palm tree–lined city street in Los Angeles with cars, traffic lights, and buildings in the background.

Riverside, CA

Overhead view of a residential California neighborhood with houses, streets, and greenery.

John Sylvester

Client Testimonials

I hired John Sylvester two years ago while I was going through several issues in my family law case. To date, he has helped me resolve every single one of those issues in my favor. His professionalism and knowledge of the law is second to none. He was always responsive when I had questions. He helped me understand how everything worked, from RFOs, to subpoenas, to trial litigation. John always had a plan, and he was always prepared. He was able to take all the information I gave him and make sense of it all. John never pushed me to spend more money and Rebecca the co-owner was kind enough to work out the financial aspects of my bills with me. I consider myself fortunate to have had the opportunity to work with John, and I have already recommended him to friends and family who want the best family attorney in San Diego.

Anthony C

Attorney John Sylvester represented me on an appeal filed by my ex on a domestic violence restraining order that I had won. Appeals are not easy. You come in after the fact and need to get up to speed. The Responsive Brief he wrote and filed was amazing. So much so that my ex filed for a dismissal of his appeal. I can't speak highly enough of John's knowledge of the law and his professionalism. I would (and will) recommend John to anyone out there looking for THE BEST family law attorney/appellate attorney.

Mandy Kersh

My review is for my experience with John Sylvester. John is a top tier attorney all around. He is an excellent advocate and has in depth knowledge of family law issues. He is also excellent in court--very persuasive, well-prepared, organized, and detailed oriented. He is kind, professional, and fair with billing. He was honest with me when I was faced with a hard litigation decision and never took advantage of me for additional fees. I highly recommend John if you need an attorney who is honest and compassionate, well-versed in the law, and excels in the courtroom.

Alexa White

If you're considering Cage & Miles and have the opportunity to work with John Sylvester, proceed with Confidence! John is a fantastic lawyer. I recently had an issue that required 4 lawyers across 2 states and John was by far the best of all of them. Not only is his knowledge of the law and the court's procedural processes unparalleled but his level of detail, "bedside manner," and investment of time to make sure you're prepared and updated make him a delight to work with. I cannot recommend John and the Cage & Miles team highly enough to do him/them justice for the experience and effort they'll bring to your case. My recommendation: proceed with confidence!

Chad Senechal

I have been been represented by Cage & Miles for the past two years on a multitude of issues surrounding custody of my son. John Sylvester and his team worked diligently with me throughout the entire process, outlining what to expect with upcoming litigation as well as what needed to be done on both our ends to present the best possible case. He and his team answered any and all of my questions in a timely manner, being straightforward with answers even if they were not what I wanted to hear. This enabled me to make clear and concise decisions surrounding my litigation, which has ultimately seen me gain joint custody of my son even with the books stacked up against me. The financial team, led by Russel and Rebecca, worked within my budget so that I could maintain having top notch representation without stressing over my finances. Overall, I would recommend Cage & Miles to anyone going through any family law matter. They treat you like family and I look forward to working with them and John in future litigation.

Scott Tiedeman

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