Sion & Associates

Attorneys at Law

Advocators, Litigators, Educators

Concentrating on Workers' Compensation Defense

About Us

Los Angeles    |    San Mateo

We are a community of professionals who enjoy our work, our clients, and our associations with each other.


Steven Mark Sion

Founder & Principal

Mr. Sion is a native of Providence, R.I., and is a past member of the Rhode Island State and District of Columbia Bar Associations. Mr. Sion joined the California Bar in 1991, and has practiced law in California since that time.

Mr. Sion studied at Providence College, the University of Fribourg (Switzerland) and New England School of Law. In Rhode Island, he worked in both civil litigation and workers’ compensation.

Prior to founding his own business in 1998, Mr. Sion was an Associate respectively at the law firms of Gilbert, Kelly, Crawley & Jennett, and Seyfarth, Shaw, Fairweather & Geraldson.

In addition to his practice, Mr. Sion actively pursues legislative advocacy on behalf of employers, and was thrice elected to annual terms as Chair of the Legislative Affairs Committee on the Board of Directors of the Professionals In Human Resources Association (PIHRA).

Administrative Team

If you are interested in joining our team, please send a cover letter and resume to

Firm Employer Guides & Presentations

An Employer's Guide to Return to Work Issues in California

Reform of the Reform Legislation:  A Discussion of Senate Bill 863

Effective Workers' Compensation Claims Management: Minimizing Costs

The Spinal Surgery Guide

A New Day in California Workers' Compensation Laws


Sion & Associates

Attorneys at Law

Contact us today at
or use the form below.

Our Addresses

1880 Century Park East, Suite 617
Los Angeles, CA 90067
(310) 858-7500

1900 S. Norfolk Street, Suite 350
San Mateo, CA 94403
(650) 249-9069