Tel:  (671) 477-7857

Fax: (671) 472-4290

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Current Time in Hagåtña, Guam


Mr. Johnson (who goes by Mars) was born in Palau and raised in Guam.  Following high school, he moved to Minnesota, where he attended Carleton College, earning his B.A. in Sociology and Anthropology in 2004.  Eager to return to warmer weather, he moved to Hawaii to study law at the William S. Richardson School of Law, University of Hawai'i, graduating in 2008. 

Following law school, Mr. Johnson chose to stay in Hawai‘i, accepting a position at Kessner Umebayashi Bain & Matsunaga and then at Hughes Richards & Associates.  At both firms, his work focused in the areas of employment litigation, construction defects litigation, medical malpractice defense, workers’ compensation defense, and general personal injury defense. 


In 2013, Mr. Johnson returned to Guam and joined Blair Sterling Johnson & Martinez.  At the firm, Mr. Johnson has worked primarily in civil litigation, with an emphasis in personal injury defense, government procurement, construction litigation, and workers’ compensation law.  He has also worked on a wide variety of legal matters, both large and small, including: 

  • Defending a divided fuel supply contract awarded by the Guam Power Authority against a protest by a competing bidder who sought an all or nothing award of the contract.  Mr. Johnson obtained a favorable result, allowing the client to supply an estimated $10 million in USLD per year over the course of three years. 

  • Overturning the award of a water reservoir construction contract by showing that the winning bidder lied to the procuring agency about its safety record in its bid documents.  Based on the protest, the contract, valued in excess of $20 million, was instead awarded to the firm’s client. 


  • Successfully protesting an insurance company’s denial of coverage for a client’s pacemaker replacement by arguing that the replacement was covered under her insurance plan’s schedule of benefits.  This favorable decision resulted in the client reaching her out-of-pocket maximum for that year, entitling her to reimbursement for all out-of-pocket costs incurred after her pacemaker replacement. 

Community Involvement

Mr. Johnson devotes a great deal of his personal time to service in the community.  He is a high school mock trial coach for St. John’s School.  He is a member of the Rotary Club of Guam where, as the club’s International Services Director, he coordinates its annual international student exchange program with the Rotary Club of Karuizawa Japan.  He is on the board of directors for Make-A-Wish Guam and CNMI.  He also serves as a member of the Guam Real Estate Commission and a member of the Adjudicative Panel of the Guam Bar Association’s Professional Ethics and Unauthorized Practice of Law Committee. 


Mr. Johnson is a past member of the Steering Committee for the Guam Chamber of Commerce’s Guam Young Professionals Subcommittee where he served as chair of its “Be Influential” initiative, which organizes a mentorship program and legislative candidate forums. 


A past chair of the Guam Bar Association’s Continuing Legal Education Committee, Mr. Johnson organized the Guam Bar Association and District Court of Guam’s 2016 Law and International Practice Conference, held in Manila. 


He is a past Director of the Palauan Community Association of Guam and past Vice President of the Ngaraard Club of Guam.  Both organizations seek to support and organize events for Guam residents of Palauan descent. 


As a law student, Mr. Johnson served two terms as President of the William S. Richardson School of Law Student Bar Association. He also served as a Director of the William S. Richardson School of Law Alumni Association from 2009 until 2012.  

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  • University of Hawai'i, William S. Richardson School of Law, J.D. (2008)

  • Carleton College, B.A. Sociology & Anthropology (2004)

Bar Admissions

  • Hawai'i (2008)

  • Guam (2013)

  • Northern Mariana Islands (2013) 

  • U.S. District Court, District of Hawaii (2008)

  • U.S. District Court, District Court of Guam (2013)

  • U.S. District Court for the Northern Mariana Islands (2013)

Professional Activities

  • Professional Ethics and Unauthorized Practice of Law Committee, Adjudicative Panel Member (2019 to Present)
  • Guam Bar Association Continuing Legal Education Committee, Chairperson (2015 - 2017)
  • Guam Bar Association Legal Aid and Lawyer Referrals Committee, Member (2015 - 2017)


  • Palauan

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