John's practice includes all aspects of the planning and administration of trusts and decedents' estates, fiduciary asset management and litigation related to trusts and estates. John frequently acts as a mediator, consultant, or expert witness in estate-related litigation. He is certified as a specialist in Probate, Estate Planning and Trust Law by the California Board of Legal Specialization.

John has spoken and written frequently on subjects connected with his professional specialty. He served as consultant to California Continuing Education of the Bar for California Will Drafting and California Decedent Estate Practice.

He is listed in The Best Lawyers in America. He has testified before various committees of the California Assembly and Senate and worked with various Assembly Members, Senators and staff in regard to legislation affecting the legal profession.