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Mase, Greg A. Senior Counsel

Mase, Greg A. Senior Counsel

Practice Focus

Greg A. Mase is senior counsel in Tressler's Northern California office and a member of the firm’s Litigation Practice Group. Greg brings 31 years of experience to the firm. His practice focuses primarily on preparing, opposing and arguing dispositive motions in high-stakes cases while maintaining a winning record. Greg has also briefed and argued numerous appeals in the California Courts of Appeal and the United States Court of Appeals for the Ninth Circuit. 

Professional Background

Greg has prevailed on numerous dispositive motions and appeals, the following of which are just a few examples.   

  • In Lambdin v. Mangold Property Management, Inc. (2024) Cal. App. Unpub. WL 226816, briefed and argued before the Sixth Appellate District, convincing it that the trial court had correctly granted an anti-SLAPP motion in favor of the defendant property managers dismissing the case.  On remand following the appeal, the trial court awarded defendants over $136.000 in attorney fees.

  • In Elizondo v. Balfour Beatty Construction Co. (2024) Cal. App. Unpub. Case No. A166493, briefed and argued before the First Appellate District, convincing it that that trial court had correctly granted the defendant construction company’s motion for summary judgment based up the doctrine set forth in Privette v. Superior Court (1993) 5 Cal.4th 689, as the defendant did not retain control over the worksite in a manner that affirmatively contributed to the plaintiff workers’ injuries.

  • In Wells v. 99 Cents Only Stores (2022) Cal. App. Unpub. LEXIS 338, Greg briefed and argued an appeal before the First Appellate District, convincing it that the trial court had correctly sustained the defendant’s demurrer, where the plaintiff had failed to comply with a local rule. In Glassner v. Smith (2015) WL 2127065 (unpublished), Greg represented five HOA members who had been sued for defamation. On appeal, the court reversed the trial court’s order denying an anti-SLAPP motion filed by four of Greg’s clients but affirmed the order granting the anti-SLAPP motion filed by the fifth. Thus, all five clients prevailed on appeal and were awarded their attorney fees; on remand, the court awarded defendants over $248,000 in fees.  

  • In Sudol v. Sage-DeLuca Associates (2012) C071003, Greg filed a petition for writ of mandate arising from the trial court’s denial of the defendant’s summary judgment motion. In a highly unusual move, the court issued a notice indicating its intent to issue a peremptory writ of mandate, resulting in the resolution of the case without payment. 

  • In Newby v. Dep’t of Gen. Servs. (2007) App. Unpub. LEXIS 6310, Greg prepared and argued a successful summary judgment motion in a catastrophic personal injury case where the exposure exceeded $20,000,000. Greg also handled the plaintiff’s ensuing appeal in which the Third Appellate District affirmed summary judgment and awarded defendants their costs.  

  • In Tei Yan Sun v. Taipei Econ. & Cultural Representative Office (9th Cir. 2002) 34 Fed. Appx. 529, Greg briefed and argued an appeal on behalf of Taiwan, in which the Ninth Circuit affirmed the district court’s finding that it did not have jurisdiction over plaintiff’s wrongful death action under the Foreign Sovereign Immunities Act. 

Personal Life

In his free time, Greg enjoys playing chess, exercising and spending time with his dog. 

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