San Diego, California



  • Guam
  • U.S. District Court of Guam
  • Northern Mariana Islands
  • U.S. District Court of the Northern Mariana Islands
  • High Court of the Trust Territory of the Pacific Islands
  • California
  • U.S. Court of Appeals, Ninth Circuit
  • U.S. Supreme Court


  • University of California, San Diego (B.A., 1982)
  • University of California, Davis, King Hall (J.D., 1985)


  • Guam, Northern Mariana Islands and American Bar Associations
  • State Bar of California



Mitchell Thompson is the Managing Partner of the Firm. He has over thirty years of experience in civil litigation, maintaining a practice emphasizing law and motion work as well as trials.  

Mr. Thompson began his legal career in 1985 as a term law clerk with the Honorable Peter C. Siguenza, Jr. at the Superior Court of Guam. Following this judicial clerkship, Mr. Thompson was an associate with Carbullido & Pipes, P.C. from 1986 to 1990.  Thereafter he was a principal in Maher & Thompson, P.C. from 1990 until 2013.

Over the years, Mr. Thompson’s practice has emphasized litigation concerning commercial matters, professional liability and writ proceedings.  He has successfully represented healthcare and other professionals in professional disciplinary matters.   

Career highlights include the following: 

In re Application of DPHSS, 2017 Guam 15 (Reversing trial court for refusing to order government agency to return substances seized under administrative search warrant when agency failed to establish legitimate reason to withhold them).   

Kennedy v. Sule, 2015 Guam 38 (reversing plaintiff’s judgment in dental malpractice action; holding that statute of limitations barred portion of claim which arose prior to plaintiff seeking second opinion from specialist).

Aguero v. Calvo, 2015 WL 3573989,Civ. Case No. 15-00009 (D. Guam, Order & Opinion, June 8, 2015) (high profile civil rights case establishing marriage equality in Guam).

Joseph v. Guam  Board of Allied Health Examiners
, 2015 Guam 4 (Licensing board’s order suspending professional’s license to practice was void, due to board’s failure to comply with the Guam Open Government Law). 

​Lujan v. Quinata
, 2014 Guam 20 (lack of requisite hostility of possession precluded defendants’ adverse possession claim; and trial court’s grant of summary judgment affirmed based on lack of satisfactory proof of an oral gift).

Castino v. G.C.Corp.
, 2010 Guam 3 (Guam’s mechanic’s lien laws are remedial in nature, and are to be interpreted liberally in favor of the lien claimant; trial court erred in dismissing lien claim based on lack of formal verification for lien).

Sule v. Guam Board of Dental Examiners, 2008 Guam 20 (affirmed in part and reversed in part; professional licensing board lacked authority to impose attorneys’ fees as part of professional discipline).

Haeuser v. Dept. of Law, 368 F.3d 1091 (9th Cir.2004) (manifest error for Guam Supreme Court to reverse trial court’s factual findings; appellate court may not properly re-weigh evidence in reviewing such findings).    

Dizon v. Superior Court, 1998 Guam 3 (writ of prohibition issued to recuse trial judge when he received letter regarding the case from an appellate judge but failed to timely disclose same to all parties).

Haeuser v, Dept. of Law, 97 F.3d 1152 (9th Cir.1996) (Guam statute which removed civil service protection from government lawyers violated Guam’s Organic Act).  

Mr. Thompson has been a member of the Guam Bar Association Ethics Committee for a number of years, and recently served as its Chair.  Mr. Thompson has also been a member of the Guam Law Library Board of Trustees for several years.  He is certified to act as a mediator by the Guam Judiciary.