James V. Sansone, Esq. - A Litigation Leader for Washington
Judicial Insight & Trial Strategy
Mr. Sansone previously served as a Judge Pro Tem in California, presiding over civil proceedings and issuing reasoned judicial decisions. This experience provides valuable courtroom insight into judicial expectations, evidentiary standards, and persuasive advocacy benefiting clients in complex trial settings.
Since his admission to the California bar in 2006, Mr. Sansone’s practice has been defined by continuous trial-level advocacy, encompassing an exceptional volume of trials and contested evidentiary hearings across complex matters. That sustained courtroom experience shapes the precise, strategic approach he brings to each representation.
Education & Professional Credentials
Mr. Sansone earned his Juris Doctor, Cum Laude, and received multiple academic excellence awards. He holds a Bachelor of Science in Applied Economics and is admitted to practice in:
- Washington State Bar
- State Bar of California
- U.S. District Courts (Central & Northern Districts of California)
- U.S. Court of Appeals for the Ninth Circuit
James V. Sansone, Esq.
Managing Attorney
Family Law Complex Litigation Advocacy PLLC
Bar Admissions: California (244671) · Washington (57885)
Family Law Complex Litigation Advocacy PLLC
600 Stewart St, Suite 400, Seattle, WA 98101
(206) 792-7003
office@familylawcomplexlitigation.com
James V. Sansone, Esq.
Managing Attorney | Seattle Complex Divorce & Civil Litigation Lawyer
Seattle Complex Family Law & High-Asset Divorce Attorney
James V. Sansone, Esq. is a results-driven Seattle family law attorney and managing litigation lawyer with more than 20 years of experience handling complex divorce, high-conflict custody disputes, interstate jurisdiction cases, and high-asset marital estates in Washington and California.
As Founder and Managing Attorney of Family Law Complex Litigation Advocacy, PLLC, Mr. Sansone leads a boutique litigation firm dedicated to sophisticated, document-intensive, and high-stakes family law matters. His practice focuses on strategic courtroom advocacy, trial preparation, and protecting clients facing life-altering legal disputes.
With over 1,000 bench trials and evidentiary hearings litigated, he brings rare courtroom depth and decisive legal strategy to every case.
High-Conflict Divorce & Custody Litigation in Washington
Mr. Sansone represents clients in complex and contested family law matters, including:
- High-asset divorce and property division
- Multi-million-dollar marital estates
- Contested child custody and parenting plan litigation
- Interstate and international custody disputes (UCCJEA)
- Emergency relocation petitions
- Domestic violence and abuse-related proceedings
- Enforcement and modification actions
He regularly works with forensic psychologists, guardians ad litem (GALs), parenting evaluators, business valuation experts, and financial specialists to build compelling, evidence-based litigation strategies.
Clients throughout Seattle and Washington trust his firm for strong courtroom advocacy in high-conflict divorce and complex custody cases.
Interstate & Cross-Jurisdictional Family Law (UCCJEA)
When custody disputes cross state or international borders, jurisdiction becomes critical. Mr. Sansone has successfully handled numerous interstate and cross-border custody disputes under the Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA), protecting parental rights while navigating complex procedural challenges.
His cross-jurisdictional litigation experience in both California and Washington gives clients a strategic advantage in multi-state disputes.
Complex Litigation Experience
Mr. Sansone’s career has been defined by courtroom advocacy in complex, high-conflict matters. While his practice has long centered on sophisticated family law litigation, his background also includes substantial experience in high-exposure civil and commercial disputes.
He previously practiced at one of Sonoma County’s top five law firms, where he focused exclusively on business and commercial litigation. His work involved contract disputes, business torts, employment litigation (Title VII, FEHA, FLSA, PAGA), shareholder and partnership conflicts, and bankruptcy-related proceedings. In addition, he formerly maintained a selective litigation consulting practice, advising firms on case strategy, evidentiary development, dispositive motion practice, and trial preparation in complex civil matters.
Across his commercial litigation matters, Mr. Sansone achieved a success rate exceeding 90% in resolved cases, representing clients ranging from closely held enterprises to substantial corporate interests.
This dual foundation complex commercial litigation and sophisticated family law advocacy informs a singular litigation philosophy: disciplined preparation, financial fluency, strategic leverage, and decisive courtroom execution. It enables Mr. Sansone to manage matters involving business ownership interests, valuation disputes, layered asset structures, and aggressively litigated proceedings with precision and control.