Judge Mary E. Wiss

Judge Mary E. Wiss of the San Francisco Superior Court brings a distinctive combination of deep plaintiff-side tort litigation experience and a rigorous, procedure-focused judicial temperament to the Complex Litigation Department. Appointed by Governor Gray Davis in May 2001 to fill a vacancy created by Judge Laurence Kay's elevation to the Court of Appeal, she has served for over two decades and holds the distinction of being the first female judge to preside in SF's Complex Litigation Department—a milestone that reflects both her professional standing and her command of high-stakes civil matters. Her pre-bench career as a partner at Baum, Wiss & Blake and later in solo practice concentrated on personal injury, wrongful death, product liability, and medical negligence, giving her granular familiarity with the evidentiary and strategic mechanics of tort cases that many jurists lack. Despite her plaintiff-side background, Judge Wiss has been characterized by practitioners as defense-oriented on the bench, a pattern not uncommon among former plaintiff attorneys who develop skepticism toward overreach after years of seeing litigation tactics from the inside. Her leadership roles—president of the California Judges Association in 2009 and president of the San Francisco Trial Lawyers Association in 1997—signal a judge who is deeply embedded in the legal community and attentive to professional norms and conduct. A reported 2018 ruling against class-action certification in a Twitter gender bias case, if attributable to her, would be consistent with a rigorous gatekeeping approach to class certification requirements. Judge Wiss is also noted for treating rudeness harshly, which is a defining behavioral marker attorneys must internalize before any appearance. Her background as a mediator with the American Arbitration Association further suggests comfort with nuanced factual disputes and a preference for structured, well-organized advocacy. Attorneys appearing before her should expect a judge who is substantively prepared, procedurally demanding, and intolerant of unprofessional conduct in any form.

Attorneys appearing before Judge Wiss should prioritize procedural precision above all else. Given her two-plus decades presiding over complex civil litigation and her pre-bench specialization in tort law, she will quickly identify sloppy pleadings, unsupported evidentiary claims, or arguments that conflate legal standards. Do not assume her plaintiff-side background creates sympathy for plaintiff positions—her reported defense-oriented tendencies on the bench suggest she applies a skeptical, gatekeeping lens to claims, particularly in class actions and mass tort contexts. Frame arguments in terms of established legal standards, not equitable appeals, and be prepared to defend every factual assertion with specific record citations. For class certification motions or complex case management matters, anticipate rigorous scrutiny of numerosity, commonality, typicality, and adequacy. If the 2018 Twitter gender bias class certification denial is attributable to her, it signals that she will not certify a class where individualized issues predominate, regardless of the sympathetic nature of the underlying claims. Defense counsel should lean into predominance and superiority arguments with concrete data. Plaintiff counsel should over-prepare on the commonality and typicality prongs and be ready for pointed questions from the bench. Her mediation background with the American Arbitration Association suggests she values parties who have genuinely engaged in settlement discussions and who approach litigation with proportionality in mind. Demonstrating good-faith efforts at resolution, even in adversarial postures, may favorably color her discretionary rulings. Above all, maintain scrupulous professionalism—her known intolerance for rudeness means that any sharp elbow thrown at opposing counsel, even subtly, carries real risk of judicial rebuke.

• critical

  Review Department Standing Orders and Local Rules Meticulously

  Judge Wiss's procedure-focused reputation means compliance with the Complex Litigation Department's standing orders, page limits, formatting requirements, and filing deadlines is non-negotiable. Obtain and review the most current version of her department's standing orders before any filing or appearance.

• critical

  Prepare Rigorous Class Certification Record (If Applicable)

  If your matter involves class certification, build an exceptionally detailed factual and legal record on each certification element—particularly commonality, typicality, and predominance. Anticipate skeptical questioning and prepare concise, record-supported responses to the hardest objections.

• critical

  Conduct Courtroom Demeanor Briefing for All Counsel

  Before any hearing, brief all attorneys and support staff on Judge Wiss's documented intolerance for rudeness. Establish clear protocols for how to handle provocative opposing counsel behavior without responding in kind. A single discourteous moment can undermine an otherwise strong presentation.

• important

  Anchor Every Factual Assertion to the Record

  Given her substantive expertise in tort law and her procedural rigor, unsupported factual claims will be noticed and may damage credibility. Every assertion in briefs and oral argument should be pinned to specific record citations, deposition testimony, or documentary evidence.

• important

  Document ADR and Settlement Efforts Thoroughly

  Her mediation background suggests she monitors whether parties are engaging in good-faith settlement efforts. Maintain a clear record of all ADR participation, mediation sessions, and settlement communications to demonstrate proportionality and good faith in case management conferences.

• important

  Research Any Recent Rulings in Her Department

  With zero analyzed rulings in the current dataset, attorneys should independently research recent published and unpublished orders from her department through Trellis, CourtListener, or the SF Superior Court's own records to identify any emerging patterns in her current rulings before appearance.

• ›Never interrupt opposing counsel or the judge under any circumstances—Judge Wiss is documented as treating rudeness harshly, and interruptions are among the most visible forms of discourtesy in a courtroom setting.
• ›Address all parties, witnesses, and court staff with formal courtesy; avoid sarcasm, dismissive body language, or condescending tone even when opposing arguments are weak.
• ›Be fully prepared to answer substantive questions from the bench without deflecting—her tort litigation background means she will ask technically informed questions and will notice evasion or lack of preparation.
• ›Arrive early, have all materials organized, and be ready to proceed the moment the court calls your matter; her complex litigation docket demands efficiency and she is unlikely to tolerate delays caused by counsel unpreparedness.
• ›If you disagree with a ruling, register your objection calmly and on the record, then move on—do not argue with the court or display visible frustration, as this will be noted negatively.
• ›Follow all courtroom technology and exhibit protocols precisely; in a complex litigation department, improper handling of evidence or demonstratives reflects poorly on counsel's overall competence.