William A. Cosmopulos

Labor and Employment Law - Management

4.0 (1 reviews)

San Diego, California

2+ years experience

Updated: Jan 03, 2026

Contact Information

415-433-1940

https://www.littler.com/people/william-cosmopulos

101 Second Street Suite 1000 San Francisco CA US

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Bio

William A. Cosmopulos is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law - Management. William A., who practices law in San Francisco, California, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William A. is held by other top lawyers in the same geographic and legal practice area.

Practice Areas

Labor and Employment Law - Management

Awards & Recognition

Recognized: Labor and Employment Law - Management

Recognized in Ones to Watch since 2023

Education

University of California Hastings College of the Law, J.D., graduated 2016

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Reviews

Emma Diaz

2 weeks ago

Knowledgeable and effective counsel for employment matters

I engaged William Cosmopulos at Littler to advise on a complex employee termination and potential wrongful discharge claim. His knowledge of California labor law was immediately evident. He provided clear, strategic guidance that helped us navigate the situation correctly, ultimately avoiding litigation. It was reassuring to know we were working with an attorney recognized by Best Lawyers in Labor and Employment Law - Management. William is sharp, professional, and explains legal concepts in a way that's easy for a business owner to understand. While his response time was occasionally slower than I'd have preferred during a very busy period, the quality of his work was consistently excellent. I would confidently recommend him for employment law matters in San Diego.