Mark J.G.
Desrosiers

Senior Associate

Mark Desrosiers
OFFICE:
  • West Los Angeles
LANGUAGES:
English

Mark Desrosiers navigates complex land use and environmental matters at the administrative, trial, and appellate levels for public and private clients alike.

Mark's unique perspective stems from his early career in the judiciary. As a former clerk in both trial and appellate courts, he gained invaluable insights into judicial decision-making, equipping him with the skills to prepare projects for potential legal challenges and craft compelling arguments tailored for judges. Additionally, his tenure at the City Attorney’s Office of Glendale further honed his expertise. There, Mark managed complex land use litigation, negotiated high-stakes transactions, and played a key role in drafting ordinances that addressed pressing municipal challenges. His work reflected a deep understanding of the intersection between local governance and land use law, contributing to the city’s legal and policy frameworks.

His practice focuses on intricate issues arising under CEQA, planning laws, and zoning regulations. His extensive experience includes guiding General Plan updates, mixed-use developments, affordable housing projects, and public works initiatives through challenging regulatory and legal landscapes.

Mark also has experience in high-profile litigation and appellate advocacy. He has represented clients in precedent-setting cases, including serving as counsel to The Regents of the University of California in a landmark California Supreme Court victory defending UC Berkeley’s Long-Range Development Plan and the student and supportive housing project proposed for “People’s Park.” Mark has argued critical motions and cases in trial and appellate courts, including a five-day bench trial defending nearly 40 years of the City of Carlsbad’s application of its Growth Management Plan.

An active member of the City Attorneys Association of Los Angeles County, Mark has shared his expertise as a seminar leader on significant cases, including the U.S. Supreme Court’s decision in Sheetz v. County of El Dorado. He has also authored articles for the Association of Environmental Professionals, offering thought leadership on emerging issues in environmental law.

Complementing his legal acumen, Mark brings a financial perspective from his prior role as a financial analyst at a boutique real estate investment firm, where he developed sophisticated financial models for bridge loan investments in hospitality and commercial properties. This multidisciplinary background enables Mark to approach land use and environmental matters with both legal precision and a nuanced understanding of financial and development dynamics.