Gregory Alan Mase
Tressler, LLP
Walnut Creek, CA • Serving Contra Costa County
About Gregory Alan Mase
Gregory Alan Mase is a California-licensed attorney practicing in Walnut Creek, Contra Costa County. Admitted to the State Bar of California in 1993 (Bar #164002) with 33 years of practice. Currently practices at Tressler, LLP.
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Education
- Law School: UC Hastings COL; San Francisco CA
Notable Case Results
Office Location
Tressler, LLP
Tressler, LLP, 1255 Treat Blvd, Ste 300
Walnut Creek, CA 94597
Discipline status
We publish disciplinary status sourced from public State Bar of California records on every attorney profile. We display this transparently because clients deserve full information. Disciplinary history alone does not mean an attorney is unqualified — many attorneys with past discipline are competent practitioners — but it is information clients have a right to know when making a hiring decision.
Verified from State Bar of California records 2026-06-13.
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