Kathryn G. Mantoan

Of Counsel

San Francisco


Kathryn (Katie) Grzenczyk Mantoan is Of Counsel in Orrick's Employment Law & Litigation group, working across the San Francisco and Portland offices.  She focuses on high-stakes employment litigation, compliance counseling, and litigation avoidance measures. Her practice has a particular emphasis on complex class actions and developing areas of the law including pay equity, and she co-chairs Orrick's Pay Equity Task Force.

Katie was a part of the trial team that obtained a complete dismissal for Oracle in OFCCP v. Oracle, a high-stakes systemic compensation discrimination case that garnered national media attention. Katie and her co-counsel were named "Litigators of the Week" by American Lawyer for the win.

Previously, Katie received California Lawyer’s Attorney of the Year Award in 2016 and was named a Northern California Super Lawyers "Rising Star" for seven consecutive years. She regularly writes and publishes on pay equity developments and has presented on the topic to three separate state bar associations.

Katie started her career at Orrick in 2004 and returned in 2015. From 2011 to 2014, she was an associate at a litigation boutique in San Francisco where she handled employment and constitutional law matters.

  • Katie has significant experience litigating a broad range of employment issues. Her recent experience includes the following:

    Class & Mass Actions

    • Defeating class certification in an action a leading technology company in alleging nationwide gender discrimination in performance evaluations, promotions and pay
    • Securing decertification of first-of-its-kind class action against a leading technology company under California's amended pay equity law
    • Representing a national bank in putative statewide class action alleging misclassification of information technology employees
    • Representing a government contractor in the trial court and on appeal in a dispute arising out of aggregate settlement of dozens of wrongful termination and age discrimination claims
    • Representing a national retailer in a putative nationwide class action arising out of pre-employment background checks

    Government Enforcement Actions

    • Representing a leading technology company in compliance audits and enforcement proceedings by the OFCCP
    • Securing no-cause finding and dismissal of EEOC complaint alleging race and gender discrimination by a financial services firm


    • Achieving a complete defense award following a two-week arbitration on behalf of biotechnology start-up executives in an arbitration alleging violation of non-competition and non-solicitation agreements
    • Representing a financial services firm in FINRA arbitration proceedings brought by a former financial advisor

    Single Plaintiff Discrimination/Wrongful Termination

    • Achieving summary judgment on behalf of an energy company in a single plaintiff action alleging a host of claims including gender and disability discrimination, failure to accommodate, harassment, and retaliation
    • Securing demurrer without leave to amend in single plaintiff wrongful termination action against cosmetics retailer
    • Representing a government contractor in eight-count discrimination, wrongful termination, and breach of contract case

    In addition, Katie has worked on a variety of other commercial and constitutional matters that have expanded her litigation and counseling perspective. She also has a demonstrated commitment to pro bono work, including work to protect and advance the civil rights of same-sex couples.