Who We Are

Since 1942, we have offered proactive and responsive advisory, assurance and tax services to family-owned businesses, entrepreneurs, and other successful individuals throughout the United States and abroad. We are incredibly passionate about the clients that we serve, and we work endlessly so you can sleep more soundly at night. We take pride in truly knowing who our clients are. Knowing your business really is our business. Although we work hard, we also like to have fun too. Whether it’s Nerf wars in the office, fun monthly staff meetings, or exuberant firm retreats, we are everyday people who care.

80 plus years

Why Us

At gish SEIDEN, we treat you like family. We do not see you as just a number in our books; we know you by your name. Having a close, personal relationship with you is not only something that we really value, we believe it is necessary. We put in the long hours so you don’t have to. We stay current on the latest accounting news and tax laws and have a highly committed team that will work with you every step of the way.

Nexia International

gish SEIDEN LLP is a member of the “Nexia International” network. Nexia is a leading, global network of independent accounting and consulting firms with offices in over 115 countries. When you choose a Nexia firm, you get a more responsive, more personal, partner-led service, across the world. Nexia is a highly active network that drives quality and facilitates collaboration to enable its member firms to provide effective local and global solutions. Nexia firms are focused on supporting local businesses as they grow and through the Nexia network, they can also help their clients confidently venture into new international markets.

Our History

75+ years

The Tax Cuts and Jobs Act (TCJA) was passed by Congress. The firm moves to new offices at the Warner Center Towers in Woodland Hills, CA and celebrates its 75-year anniversary.

Stan Arutti, Lance Lobdell, and Darryl Gross become partners where they remain today.

The firm name is updated to the legacy partner names, gish SEIDEN LLP.

Maureen O’Gara becomes the firm’s first female managing partner in its 64-year history.

QuickBooks dominated the market for day-to-day bookkeeping.

Lynnette Shidner becomes the firm’s first female partner in the firm’s 51-year history.

The firm celebrates its 50-year anniversary.

The World Wide Web is launched.

U.S. Congress passed The Tax Reform Act (TRA). Martin Seiden becomes a partner where he remains today.

The Economic Recovery Tax Act (ERTA) was signed into law under President Ronald Reagan.

VisiCalc, the 1st spreadsheet computer program, became prevalent and marked a huge upgrade in the field of accounting.

Firm becomes a founding member of Accounting Group International (currently Nexia), an international tax and accounting association.

The firm celebrates its 25-year anniversary.

Bob Seiden becomes a partner where he remained until his retirement.

The firm, formerly known as “Gish & Gish” was founded by brothers Earle and George Gish in Beverly Hills.

Awards and Recognitions

Partner with a firm you can trust. Our CPAs work hard to achieve your goals, but we have plenty of our own too. Take a look at some of our accolades
2023 AT Best Firms to Work For
Best Places to Work SoCal 2023
2022 best places to work
Best firms to work for 2022
best places to work socal 2022
Accounting Today - 2021 Best Firms to Work with

Make-A-Wish Tri-Counties

2017, gish SEIDEN is named Community Partner of the Year for its contributions to Make-A-Wish Tri-Counties