About Mark
Mark Jansen studied history at the University of California, Los Angeles, and earned his bachelor’s degree in 2007. He stayed in California for law school and received his J.D. from Santa Clara University School of Law in 2011. Those years shaped the way he reads facts and structures arguments. They also set the course for a law practice that crosses state and federal lines.
Early in his career he joined Fenwick & West LLP. The firm has been the primary base for his professional work. He is licensed to practice in California and the District of Columbia, and he is admitted to the United States District Court for the Northern District of California. Those credentials allow him to handle matters in different venues and respond to client needs that span jurisdictions.
Jansen’s training in history surfaces in his approach to legal problems. He tends to parse timelines carefully and to place factual threads in context. That habit shows up in legal memoranda, client meetings and court filings. Colleagues describe him as methodical. Clients rely on clear explanations rather than legalese.
At Fenwick he has worked alongside teams on varied matters. He has experience collaborating on projects that require coordination across practice groups and offices. He contributes to case preparation, participates in negotiations and assists with strategy development. His work often requires juggling technical details and procedural rules, and he aims to keep outcomes aligned with clients’ business objectives.
Outside the office he has continued to follow developments in the courts where he is admitted. Staying current on changes in federal and state procedure informs his planning and helps him anticipate issues that could affect a matter’s course. He is pragmatic about litigation risks and prefers to present clients with clear options.
Colleagues note that Jansen blends careful legal analysis with practical problem solving. He favors direct communication and an orderly approach to deadlines. He practices at Fenwick & West LLP and handles matters across California, the District of Columbia and the U.S. District Court for the Northern District of California.
