• Governmental Entity Representation & Civil Rights Defense
  • Labor and Employment
  • Professional Liability
  • Education Law
  • Appellate
  • Religious Entities and Non-Profits


  • Indiana University of Pennsylvania, B.A. in Criminal Justice; minor in History
    • Member of nationally-ranked varsity soccer team
    • Big brother and participant in Big Brothers and Big Sisters of Indiana County
  • Temple University School of Law, J.D. cum laude
  • Pennsylvania State Police Academy
    • Elected Class Speaker
  • Leadership Philadelphia


  • Supreme Court of Pennsylvania
  • Supreme Court of New Jersey
  • United States Supreme Court
  • United States Court of Appeals for the Third Circuit
  • United States Court of Appeals for the Second Circuit
  • United States District Court for the Eastern District of Pennsylvania
  • United States District Court for the Middle District of Pennsylvania
  • United States District Court for the Western District of Pennsylvania
  • United States District Court for the Eastern District of Michigan
  • United States District Court for the Eastern District of Wisconsin


  • Audubon Soccer Association- Coach (past)
  • Yardley-Makefield Soccer – Coach and Manager (past)
  • Penn Fusion Soccer Academy – Manager (past)
  • The Starfinder Foundation – Advisor (past)
  • St. Andrews Society of Philadelphia
  • International Association of Chiefs of Police
  • Pennsylvania Chief of Police Association


FDCC-Logo for Members

David J. MacMain
Rated by Super Lawyers

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David J. MacMain
Rated by Super Lawyers

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David is a founding member and the Managing Partner of MacMain Leinhauser PC. David has broad and extensive trial experience having tried over 150 cases to verdict in favor of his clients. David has, over the course of his thirty plus year legal career, focused his practice on the representation and counseling of public entities, public officials, educational institutions, religious entities, and non-profits throughout Pennsylvania, in a wide variety of civil rights and employment claims including police misconduct, zoning/land use, sexual harassment, discrimination, licensing, First Amendment, prison-based, employment, and work-place claims. David is frequently retained as a consultant and/or lead trial counsel in high-profile §1983 and municipal liability cases throughout the country. He also serves as the Solicitor for the Chester County Sheriff’s Department, West Chester Civil Service Commission, and is counsel to law enforcement agencies and correctional facilities on various issues including the review and preparation of policies, and operational issues.

David is a member of The Federation of Defense and Corporate Counsel, an international organization limited to 1400 lawyers worldwide who are selected by invitation only following an extensive peer review selection process, and Vice- chair of the Government Liability and Trial Tactics Committees. David is also a member of the Association of Defense Trial Lawyers, an invitation only organization that names only one lawyer per one million in population based on their trial skills. David currently serves of Vice-Chair of the Diversity and Inclusion Committee. David is a member of the Defense Research Institute and an active participant in the Government Liability, Trial Tactics, and Law Firm Management Committees. David has previously served as the Chair of the Governmental Liability Committee from 2019-2020, was the 2013 Program Chair of the annual conference and has been a featured speaker at several annual conferences.

David has been selected to the “Pennsylvania Super Lawyers” each year since 2004 in the field of Civil Rights as selected by an anonymous survey of lawyers and judges statewide, representing the top five percent of all lawyers in Pennsylvania. David is rated “AV” Preeminent 5.0 out of 5.0 by Martindale-Hubbell both as to his substantive legal abilities and his ethical standards.

David is a frequent speaker on civil rights, municipal liability, employment litigation, police and prison-related issues, zoning and land use, trial skills, and ethics to a variety of audiences, both locally and nationally, including law enforcement agencies and organizations, public officials, lawyers, solicitors, and insurance professionals.


After graduating from college, and prior to beginning his legal career, David served as a Pennsylvania State Trooper stationed at the Avondale, Chester County Barracks where he engaged in all aspects of police work including patrol, accident investigation and criminal investigation, in the twenty-seven (27) municipalities that the Avondale station covered. David worked several jobs to support his family while putting himself through law school at Temple University School of Law.

David began his legal career with the Philadelphia law firm of Montgomery McCracken where he began as a clerk during his final year of law school, thereafter worked as an associate for seven years, before being named a partner in 1997. During his eighteen year tenure at Montgomery McCracken, David served as Chair of the Governmental Liability and Civil Rights Practice Group, Vice-Chair of the Insurance Defense Practice Group, and as a member of the firm’s Hiring Committee, Diversity Committee, and Summer Associate Committee.


  • Pennsylvania Bar Association
  • American Bar Association
  • Defense Research Institute
    • Speaker at 2016 Annual Conference
    • Civil Rights and Governmental Liability Section
      • Vice Chair – 2017-2018
      • Chair – 2019, 2020
      • Speaker at Annual Conference – 2021, 2020, 2019, 2018, 2017, 2015, 2014, 2012, 2006, 2005
      • Program Director at Annual Conference – 2013
      • Steering Committee – 2019-Present
      • Partnering with Industry Committee – Chair – 2016, 2015
    • Trial Tactics Section
    • Law Firm Management Section
  • Protect and Serve Taskforce Chair 2019-2022
    • Speaker at Annual Conference – 2022
  • Federation of Defense and Corporate Counsel
    • Civil Rights and Public Entity Section – Vice Chair
      • Speaker at 2017 Winter Conference, 2015 Winter Conference
    • Law Practice Management Section
      • Speaker at 2016 Winter Conference
    • Employment Law Section
    • Trial Tactics Section – Vice Chair
  • Association of Defense Trial Lawyers – Vice Chair of Diversity and Inclusion
  • Pennsylvania Super Lawyer – named each year since 2004 in the field of Civil Rights
  • Martindale-Hubbell – Rated AV Preeminent (5.0 out of 5.0)
  • Best Attorneys of America