L. Mark Osher

L. Mark Osher is a partner in Gibson Dunn’s Los Angeles and New York offices and a member of the firm’s Real Estate Practice Group. Mark represents borrowers and lenders in capital markets and balance sheet financing matters, including senior and subordinate mortgage loans, mezzanine loans, credit facilities, securitizations, participations, and preferred equity investments. He also advises clients on distressed real estate situations involving foreclosures, workouts, and restructurings.

Mark earned his Juris Doctor with honors from Rutgers University School of Law in 1997 and a Bachelor of Arts in history, cum laude, from Saint Joseph’s University in 1994. His legal education supports a practice that combines financing, investment, and real estate transactional work. Mark’s matters often require careful coordination of loan structures, ownership arrangements, operating documents, and commercial terms across complex transactions involving multiple parties and significant real estate assets.

His experience includes representing institutional and non-institutional developers and operators, opportunity funds, private equity funds, and hedge funds in acquiring, developing, operating, and selling commercial real estate. Mark works across asset classes that include vacant land, office and retail buildings, industrial projects, shopping centers, multifamily properties, and hotels and resorts. He also negotiates management agreements, leasing agreements, and joint venture agreements for operators and capital partners.

L. Mark Osher helps real estate clients structure transactions and respond to financing or investment challenges throughout the life cycle of an asset. Mark’s practice spans both ordinary-course transactions and distressed situations, allowing him to address financing, ownership, operation, and disposition questions within a broader commercial context. His work supports borrowers, lenders, developers, and investment funds managing complex real estate and capital relationships across the United States.

Law Office Affiliations

• Partner, Gibson, Dunn & Crutcher LLP
• Member, New York State Bar Association
• Member, The State Bar of California

Licensed State

• New York
• California

Education

• Rutgers University
  Juris Doctor (JD)
• Saint Joseph’s University
  Bachelor of Arts (BA)

Awards & Badges