John S. Mackey

John S. Mackey

P: (808) 547-5746


John S. Mackey represents and advises employers in many areas of employment law.  He defends employers in court and in agency proceedings and investigations involving allegations of harassment, discrimination, failure to accommodate disabilities, wage and hour violations, unfair labor practices and breach of contract restricting post-employment competition or misappropriation of trade secrets. He also advises employers on issues relating to terminating employees, providing leaves of absence, properly classifying employees, and conducting internal investigations, and he drafts employment related agreements, policies and handbooks. John has been a frequent speaker on a wide range of employment law issues at seminars and for various groups and has provided workplace training on harassment and other issues.  

John has an undergraduate degree from the University of Hawaiʻi at Manoa and he attended the University of Missouri Law School where he was a member of the Law Review and the Journal of Dispute Resolution. Immediately after law school he was a law clerk for the Hon. John C. Holstein, Associate Judge of the Supreme Court of Missouri. John then worked for the Michigan Attorney General’s Employment and Elections Division representing the State of Michigan in employment and election law related litigation. He has also worked for the City and County of Honolulu in the Office of Council Services staffing City Council committees, drafting bills and resolutions, and advising Councilmembers; and in the Office of Corporation Counsel representing the City and County in a wide range of litigation. John practiced management side labor and employment law at another Honolulu law firm for almost 11 years prior to joining Goodsill in January 2017.

Practice Areas


University of Missouri, J.D. 1992
University of Hawaii, B.A. (Economics)1989

Bar Admissions

  • Hawaii
  • Michigan (not active)
  • Missouri (not active)

Admitted to Practice

  • Sixth Circuit Court of Appeals
  • District of Columbia Court of Appeals
  • State Courts of Hawaii
  • U.S. District Court of Hawaii

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