- Member, Federal Mediation Panel, United States District Court, Central District of California.
- Member, State Mediation Panel, Superior Court of California, County of Ventura
- Past Judge Tempore, Los Angeles, California
- Guest Legal Expert on Aviation, Sirius XM 132 (2014 – Present)
- Blackwell Walker, Miami (1978 -1980)
- Rossman Baumberger, Miami (1980-1982)
- Law Offices of Roger W. Clark, Fort Walton Beach, Florida (1982-1983)
- Engstrom Lipscomb and Lack, Los Angeles (1983-1992)
- Bienstock & Clark, Miami and Los Angeles (1992-2001)
- Clark, Goldberg & Madruga (and its successors), California and Florida (2001-2017)
- Law Business Insider, Co-Host, Syndicated Radio Program (2005-2011)
- Adjunct Professor of Aviation Law at Rutgers Law School, 2008 through present
- Guest commentator, SIRUS XM Radio