With 50 years of experience helping companies, contractors, employers, lawmakers and trade associations, Frank T. Mamat is one of the most experienced members of the firm's Labor & Employment Law Practice Group.

A partner in Plunkett Cooney's Bloomfield Hills office, Mr. Mamat provides counsel and assistance regarding union matters such as contract negotiations, elections, union avoidance and labor arbitrations. He advises clients on noncompete agreements, unfair labor practice litigation, harassment suits, wage and hour issues and OSHA-MIOSHA safety matters. Mr. Mamat's experience also includes resolving National Labor Relations Board matters, attempted union organization, mass picketing and violence, and secondary boycotts and pressure campaigns. He also advises clients on ERISA trust funds and related fiduciary liabilities.

Various entities ranging from the United Nations and business associations to small businesses and construction companies have routinely contacted Mr. Mamat for counsel or defense of their complex labor and union matters. A well-respected attorney known for his accessibility and responsiveness to clients, Mr. Mamat has handled virtually every type of labor matter. He also helped the Michigan Senate in 2012 draft Michigan's "Right to Work" law.

In addition to companies and employers, Mr. Mamat is well known within political circles. He has advised governments and political groups in legislative and political issues. Throughout his career, he has advised two former U.S. presidents, as well as multiple governors, U.S. and state senators, congressmen, mayors and county executives, along with dozens of candidate campaigns and political parties. He served as special counsel to former Michigan Governor Rick Snyder concerning anti-mandatory PLA statute enforcement and was special campaign counsel for Michigan to former President Donald Trump. He was also asked by four U.S. presidents to serve as a federal judge in Michigan, as assistant secretary of labor, as chair of the National Labor Relations Board and as chair of the Federal Labor Relations Authority.

Mr. Mamat is sought after nationally for his labor law expertise and serves as labor counsel for several major employer associations and nonprofit trade associations, as well as a member of various local and national boards of directors. He is frequently asked to speak on various labor and employment law issues to major trade groups.

Representative Client Work

  • Successfully stopped illegal secondary picketing at numerous job sites in the United States
  • Successfully defended various OSHA and MIOSHA fatality citations
  • Successfully advised corporations in simultaneously setting up union and non-union affiliates or divisions 
  • Successfully advised numerous companies around complicated ERISA pension fund withdrawal liability claims, including one $33 million claim against a Michigan contractor
  • Defended hundreds of union organizing campaigns successfully keeping the companies non-union
  • Handled numerous EEOC charges and convinced EEOC to dismiss all charges against clients
  • Recently convinced the U.S. Department of Justice to drop a major national investigation against an international client based in Michigan

Professional Affiliations

  • Detroit Area Construction Association (Co-founder and Past President)
  • Oakland County Sheriff Advisory Committee
  • Michigan Association of Home Builders (Board of Directors)
  • Michigan Infrastructure and Transportation Association (Board of Directors)
  • Michigan Food and Beverage Association (Labor Counsel)
  • Michigan Business and Professional Association (Labor Counsel)
  • Michigan Bar Association (Character and Fitness Committee)
  • Jewish Bar Association of Michigan (Vice President of Policy and Procedures)
  • State Bar of Florida (Senior Lawyers Committee) 
  • Construction Association of Michigan
  • Construction Code Commission of Michigan (Past Chairman)
  • Association for Corporate Growth, Detroit Chapter (Board of Directors)
  • American Society of Employers (Education Foundation Chair)
  • College of Labor & Employment Lawyers 
  • National Labor Relations Board’s Practice and Procedure Committee for Region 7 - Michigan 
  • American Bar Foundation
  • Private Directors Association
  • Federalist Society
  • Republican National Lawyer’s Association
  • American Society of Employers (Past Chair)
  • Labor & Employment Council for Associated General Contractors of America (Past Chairman)
  • Construction Finance Management Association (Past President)

Community Involvement

  • Detroit Economic Club (Speakers Committee)
  • Detroit Athletic Club (Membership Development Committee)
  • Oakland County Republican Party (Finance Chairman and General Counsel)
  • 400 Club, Republican Party (Founder and President)
  • Anti-Defamation League (Former Board of Directors)
  • Jewish Vocational Services (Former Board of Directors)
  • Barristers of B’nai B’rith (Past President)
  • Metropolitan Detroit Council of B’nai B’rith
  • Oakland County Lincoln Republican Club (Past President)
  • Temple Israel Brotherhood (Board of Directors)
  • Wayne State University Law School (Adjunct Professor of Labor Law)



  • Syracuse University College of Law, J.D., 1974
  • University of Rochester, B.S., 1971


  • Michigan
  • Florida
  • District of Columbia


Honors & Recognitions

  • Martindale-Hubbell's highest rating-AV Preeminent™ Peer Review Rated 
  • Top 100 Labor Lawyers in the U.S., Labor Relations Institute
  • Best Lawyers in America® for Employment Law - Management, 2010 - 2024
  • Best Lawyers in America® for Labor Law - Management, 2010 - 2024
  • Best Lawyers in America® for Litigation - Labor and Employment, 2010 - 2024
  • Michigan Super Lawyers in Employment & Labor: Employer, Employee Benefits, Administrative Law, Construction Litigation: Business, Employment Litigation: Defense, Government Relations, 2009 - 2024
  • Top Lawyers in Metro Detroit, DBusiness Magazine
  • The American Lawyer Top Lawyers
  • Crain’s Detroit Business Best Lawyers
  • Top Lawyers in Michigan, The American Registry


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