JEFFREY P. MACH, JR., CFLS – Lead Attorney
Jeffrey P. Mach, Jr. is the lead attorney and CEO of Mach Law. He is a Certified Family Law Specialist in the state of California, which means he has been certified by the State Bar of California Board of Legal Specialization as a specialist in family law. Mr. Mach’s almost 20 years of experience in family law matters includes prenuptial and post-nuptial agreements, divorce, legal separation, child custody, child visitation, adoptions, child support, spousal support, property division, wage garnishments, post-judgement modifications, and review of marital settlements agreements.
Mr. Mach has successfully represented and led hundreds of clients through the process of resolving their family law legal disputes through litigation proceeds, bench trials as well as through effective out-of court settlements.
Mr. Mach is committed to achieving the best possible outcome for you and helping you navigate through family legal proceedings with straightforward advice and his extensive experience in the San Diego family law courts.
Mr. Mach is a graduate of The University of Southern Mississippi (B.A. Political Science, 2004) and Mississippi College School of Law (J.D., 2007).

Mr. Mach has also served as an adjunct professor at Thomas Jefferson School of Law and San Diego University for Integrative Studies.
Mr. Mach is admitted to practice before all state courts in California and the United States District Court (Southern District of California).
In addition to the practice of law, Mr. Mach enjoys creating music, surfing, and basketball.
HONORS AND AWARDS
2017 Super Lawyers Award
2017 Best of the Bar Award, San Diego Business Journal
2016 Super Lawyers Award
2016 Best of the Bar Award, San Diego Business Journal
2014 Best of the Bar Award, San Diego Business Journal
Awarded Top Young Lawyers, San Diego Daily Transcript 2013
Nominated for the Top Young Lawyers Award, San Diego Daily Transcript 2008-2011 and 2014
PROFESSIONAL ASSOCIATIONS AND MEMBERSHIPS
San Diego Entertainment and Sports Lawyers
American Bar Association
Family Law Section of the American Bar Association
State Bar of California
San Diego County Bar Association
Family Law Section of the San Diego County Bar Association
SERI PAYTON-GENTILE – Office Manager
With a career spanning over a decade in the legal field, Seri started as a legal receptionist and legal assistant in 2012. She has extensive experience working at several different law firms and is exceptionally caring with each client and case that comes through the door.
In February 2022, she joined the esteemed team at Mach Law as a legal assistant. With her keen intellect and tireless work ethic, she quickly made her mark, seamlessly integrating into the fabric of the firm. In 2023, her exemplary performance and leadership qualities earned her a well-deserved promotion to the role of Office Manager. In this elevated capacity, she adeptly navigated the complexities of managing the office’s day-to-day operations while continuing to provide invaluable support to the legal team and our clients.
In her free time, Seri enjoys traveling with her husband, watching and attending sports events, concerts and spending time with her daughter and three grandchildren.

