Mark Detwiler represents management in labor and employment law matters. 

Previously, he worked for the Commonwealth of Massachusetts as labor counsel for the Human Resources Division. For over five years, Mark served as one of the Commonwealth’s chief labor and employment attorneys. He represented various Commonwealth agencies in grievance and contract arbitration, unfair labor practice charges, discrimination claims and provided general employment counseling. Mark also conducted numerous investigations into allegations of workplace violence, sexual harassment, discrimination and fraud.


Recipient, American Bar Association Award for Excellence in the Study of Labor and Employment Law

May 2013


  • J.D., University at Buffalo School of Lawcum laude
  • B.S., Cornell University School of Industrial and Labor Relations

Bar Admission

New York


  • U.S. District Court, Northern District of New York
  • U.S. District Court, Western District of New York
  • New York Supreme Court
  • Massachusetts Supreme Court