John Janicik is a partner in Mayer Brown’s Chicago office and a member of the Government Relations & Public Law practice.

John counsels clients in regulatory, government relations, public law and municipal finance areas. He represents participants in municipal finance transactions as bond counsel, underwriters’ counsel, issuer’s counsel and credit enhancer’s counsel and represents private sector clients before state and local governments. John also advises clients on a broad variety of issues, including not-for-profit entities, financings, acquisitions and strategic advice. He advises various casino industry interests on regulatory, financing and corporate matters and counsels a variety of private-sector and government clients.

Prior to joining Mayer Brown in 1988, John was associated with another prominent Chicago law firm. Between 1984 and 1985, he served as Legal Clerk to the Illinois Commerce Commission and, from 1982 to 1983, as Legislative Liaison for the Illinois Department of Commerce and Community Affairs. John also worked (1981-1982) as Assistant to James R. Thompson, then Governor of Illinois. Earlier, he held positions with a leading US food products manufacturer. John is an active member of numerous professional and civic organizations and has served with various state and local government agencies.

Spoken Languages

  • English


Loyola University Chicago School of Law, JD, Senior Member, Loyola University Law Journal

Knox College, BA


  • Illinois


  • US District Court for the Northern District of Illinois


  • Joliet Diocesan School Task Force, Chairman, 2018 to date
  • Chicagoland Chamber of Commerce, Board of Directors, Member, 2003 to date
  • Civic Federation, Board of Directors and Executive Committee, 2015 to date
  • Joliet Diocesan Finance Council, Member, 2009 to 2018; Chairman 2013 to 2017
  • Joliet Diocesan Board of Conciliation, Member, 2009 to 2014
  • IMD Guest House Foundation, Chairman, 2001 to 2014
  • Joliet Diocesan Development Council, Chairman, 2010 to 2013
  • Joliet Diocesan Pastoral Council, Member, 2002 to 2008; Chairman 2005-2007
  • America 2000, Treasurer, 1991-2004
  • Citizens for Jim Thompson, Treasurer, 1989-2004
  • Board of Commissioners, DuPage Water Commission, Commissioner, 2002-2003
  • Better Business Bureau of Chicago and Northern Illinois, Inc., Board of Directors, Member, 1995-2003
  • State Mandates Board of Review, State of Illinois, Member, 1994-2003
  • Notre Dame Parish Council, President, 1998-2000
  • Siwash Athletic Club, Board of Directors, Member, 1998-2000
  • Village of Clarendon Hills Caucus, President and Trustee Nominating Committee, Member, 1994-1995
  • District 181, Nominating Committee, Member, 1992-1993
  • Capital Development Board, State of Illinois, Member, 1990-1992
  • Board of Ethics, State of Illinois, Chairman, 1988-1989
  • American Bar Association
  • National Association of Bond Lawyers
  • Chicago Bar Association
  • Illinois State Bar Association
  • International Association of Gaming Advisors
  • Republican National Lawyers Association