Hee Sung Yoon is a Partner in the firm’s Los Angeles office. He represents insurance companies in insurance coverage disputes with their insureds or co-insurers in the areas of commercial general liability, commercial automobile, professional liability, excess, and umbrella coverage. To this end, he has represented insurance companies in bad faith, contribution, declaratory relief lawsuits, and class action lawsuits. 

Hee Sung's extensive experience in insurance coverage disputes provides him with a unique ability to evaluate complex coverage disputes and handle a wide-variety of insurance related disputes across the country.  He works closely with clients in providing coverage advice and monitoring underlying third-party lawsuits for complex claims to avoid coverage disputes. For the most recent editions of the LexisNexis Matthew Bender Practice Guide: California Insurance Coverage and Litigation, Hee Sung served as a contributor to Chapter Fourteen, on Insurance Litigation.

Prior to joining Selman Breitman, Hee Sung worked as a Law Clerk to the Honorable Elizabeth Allen White and the Honorable Debre Katz Weintraub.

Hee Sung was named to the Lawyers of Color Hot List in 2014. In July 2019, he was named to the Board of Directors for Counsel for Justice, the public-interest arm for the Los Angeles County Bar Association which operates four programs and provides legal services for victims of domestic abuse, immigration, veterans and people living with HIV / AIDS. 

Representative Matters

  • Obtained dismissal of a class action insurance bad faith lawsuit.  The court granted our motion to dismiss and motion to strike class allegations, with leave to amend.  Rather than amend the complaint, plaintiff agreed to voluntarily dismiss the lawsuit.
  • Prevailed on a cross-motion for summary judgment/adjudication finding that a professional liability insurer had a duty to defend and share in the defense costs with a commercial general liability insurer.
  • Prevailed in an appeal where the Court of Appeals found that the trial court abused its discretion for denying cost of proof sanctions for failure to admit a request for admission. 


  • "Marijuana Claims and the Criminal Act Exclusion – A Lesson In Efficient Proximate Cause," In-House MCLE, August 2018

Professional Associations and Memberships

  • Board of Directors, Counsel for Justice
  • Los Angeles County Bar Association (LACBA), Member
  • Korean American Bar Association, Member

Related Practices

Bar Admission

  • California, 2007
  • U.S. District Court Central District of California
  • U.S. Patent and Trademark Office, 2005


Loyola Law School, J.D., 2007

Member, St. Thomas More Law Honor Society

Academic Chair, Asian Pacific Law Student Association

University of California, Los Angeles, B.S., 2002

Major: Mechanical Engineering

University of California, Los Angeles, B.A., 2002

Major: Economics