California’s Leading Workers’ Compensation Defense Law Firm

Mullen & Filippi, LLP – defending clients for more than 70 years.


A certified business owned and operated by women

The Firm is certified as a Women’s Business Enterprise (WBE) through the Women’s Business Enterprise National Council (WBENC), the nations leading third-party certifier of businesses owned and operated by women. This certification process has confirmed that our business is at least 51% owned, operated and controlled by women.

By including women-owned businesses among their suppliers, corporations and government agencies demonstrate their commitment to fostering diversity and the continued development of their supplier diversity programs, which in turn empowers women as leaders and brings about a more diverse, balanced and sustainable economy.

Recognized as a leader in the pursuit and implementation of DEI Initiatives

We are proud to announce that Mullen & Filippi has been recognized by the California State Bar as a law firm that has taken significant steps to advance diversity, equity and inclusion in our organization. The State Bar DEI Leadership Seal program in its inaugural year has awarded us the highest level of Gold Seal certification for our commitment to the pursuit and implementation of research driven Leadership Seal Action Items that foster a healthy, fair and inclusive workplace for all.

Mullen & Filippi, LLP

The Firm represents and advises employers, insurance carriers, and third-party administrators in matters arising from workplace injuries.  We are committed to providing relevant information to all California employers and insurers who have a vested interest in workers’ compensation law.  We are known throughout the state for having extensive educational seminars statewide.  We also conduct customized on-site workshops, not just for clients, but for any stakeholders in the workers’ compensation community.

Your legal representation is in good hands with our attorneys.

Mullen & Filippi was founded in 1949 to provide counsel to employers, carriers and third-party administrators in the defense of Workers’ Compensation matters. This longevity speaks not only to stability and excellence in client-centered services but also recognizes the value of having a diverse Firm.

We are proud to be a majority woman-owned Firm. Mullen & Filippi is committed to recruiting, retaining, and promoting individuals of diverse backgrounds and cultures at all levels. Our clients are better served by a Firm that promotes diversity and inclusion within the workplace.

Our values, team and partners are what separates us from other workers’ compensation defense firms. As a firm, we are defined by our integrity, knowledge, expertise and ability to work collaboratively with our clients toward the end goal of expeditious and successful resolution of their cases. Our partners are recognizable as practicing professionals in the community. The success of Mullen & Filippi is defined by continuously exceeding the expectations of our clients.

We are 100% committed to obtaining top results for our clients.

  • Our client relationships are marked by responsiveness that is critical to efficient and successful defense of claims.  We understand that in your business, time is of the essence.
  • Attorneys and staff are well educated in all aspects of the law, including recent developments and best practices resulting from continuous changes in the industry.
  • Mullen & Filippi recognizes the need to invest in information technology that provides the best security for clients’ data and can be customized to support each client’s unique goals and objectives, while providing efficient and cost effective outcomes.
  • In the end, our longevity in this practice comes down to the diversity of people who make up our Firm and its leadership. We recognize the need to take care of both our clients and our intellectual talent.

Our Team M&F Equity Senior Partners

Our Services Practice Areas

Workers’ Compensation

Mullen & Filippi represents and advises employers, insurance carriers, and third party administrators in matters arising from workplace injuries. The Firm represents a variety of public entities and provides insight on issues of disability.

OSHA Defense

Employers are subject to significant and costly sanctions for alleged violations of Federal and State Occupational


Mullen & Filippi has long maintained a Subrogation Department to represent the interests of those clients

Serious & Willful Misconduct, L.C. 132(a) Discrimination Defense

Mullen & Filippi attorneys are experienced in providing effective representation to employers on claims filed under

Asbestos Defense

Mullen & Filippi handles Workers’ Compensation asbestosis cases by providing a defense at the two Workers’

Need to come up with a quick disability estimate? Our compensation calculator makes it easy to determine benefits.

Attorney Success Stories

“We are very happy with your work. You are simply fantastic and we appreciate you very  much. You are proactive, responsive, aggressive and you get the job done. You are everything a TPA or carrier that gives a darn about claim handling looks for in a strong litigator.” 

Gallagher Bassett Services

15 Offices in California Office Locations