Once upon a time, Sean was sure he’d become an engineer or scientist — but it wasn’t long before the chance to make a difference as an attorney began calling his name. After taking a year to explore Europe, he managed a legal aid store, then launched into law school where he fine-tuned his love of civics and constitutional law.

Starting out at a small law firm in Pleasanton, he found he excelled at handling employment matters of all kinds and it became his specialty. Sean became partner at Ad Astra in 2018, and is our resident employment law specialist, representing companies & individuals in litigation and general counsel. Beyond employment law, Sean also has experience in resolving business disputes.

Sean came aboard at Ad Astra in 2016 and is known for being extremely skilled, detail-oriented, flexible, and fast-thinking when it comes to his clients’ needs and rapidly-developing legal matters.

On a day off, Sean is often sailing, walking his dog, playing soccer, or spending time with his family.

California State Courts
California State Bar Association
Bar Association of San Francisco
United States District Court for the Northern District of California
United States District Court for the Central District of California
United States Court of Appeals for the 9th Circuit

Bachelor of Arts in Linguistics, University of California San Diego (minor in Law and Society)
J.D., UC College of the Law, San Francisco

Representative Matters

  • Numerous successful resolutions for lawsuits on behalf of both employers and employees
  • Successfully defended and settled Labor Commissioner proceedings

Northern California Super Lawyers, Rising Star 2016 – 2022

2nd Place at the State Bar of California Environment Negotiations Competition, 2010

2nd Place at the Liberty University Negotiations Competition, 2010

Top 5 Best Brief Award and nominated for Best Oral Argument for UC College of the Law, San Francisco’ Snodgrass Appellate Advocacy competition, 2008

4th Place Team at California State Competition of We The People, the Citizen and the Constitution, and top scoring Unit 1 for this competition, 2002


ProVisors SF 11
(Title to be determined)
Sean Gentry, Johnny Yeh, Bernard Kornberg

Bay Area Legal Aid Workers (BALAW) –
“2022 On The Ballot: State Measures and Judicial Elections”
Sean Gentry, Bernard Kornberg, Scott Raber

Bar Association of San Francisco Solo & Small Firm Annual Conference – Business Continuity for Law Firms in Case of Emergencies, Presenter, Employment Considerations for Business Continuity for Law Firms in Case of Emergencies, 2020

Employment Law Legal Update for 2019 – PASCO Spring Conference, Presenter, Human Resources, 2019

Impact of the Dynamex Case on Legal Practices – Bar Association of San Francisco Solo & Small Firm Annual Conference – Building Your Legal Empire: Knowing How and When to Add People To Your Practice, Presenter, Legal, 2019

Ad Astra Law Group Employment Law Update: Reviewing 2018, Presenter, 2019

Ad Astra Law Group Employment Law Update for 2018, Presenter, 2018

The 2016 Employment Law Updates and Its Impacts on the 2017 Landscape LIVE Webcast (The Knowledge Group), Presenter, 2017

California Employment Law Update – New Laws for 2017, Presenter, 2016

Getting Ready for 2016: Employment Law Update, Presenter, 2015

Managing your Workforce in 2015, Presenter, 2014

Cleaning House: Getting Ready for 2014, Presenter, 2013

Management, Effective Performance & Terminations in the Workplace, Presenter, 2012

BASF Solo & Small Firm Executive Committee (Communications Subcommittee)

ProVisors Network, San Francisco: San Francisco XI (executive committee), Bay Area Lawyers Affinity Group (executive committee), and Bay Area Cannabis Affinity Group.

Board Member and Officer for Californians Advancing Civic Education, a local non-profit.

Volunteer and Local Competition Coordinator, We The People program, Center for Civic Education.


  1. What is your favorite vacation spot?
    Maui, or perhaps northern and western continental Europe (Germany, France, Netherlands, Denmark, etc.)
  2. What’s your favorite quote?
    “The only thing necessary for the triumph of evil is for good men to do nothing.”
    –Edmund Burke
  3. What is your favorite food?