• Employment / Labor Law
  • Civil Rights Litigation
  • Charter School Law
  • Business Law


  • Duquesne University School of Law, JD
    • Associate Comment Editor of the Duquesne Law Review
    • Kandy Reidborth Ehrenwerth Award Recipient
  • Villanova University, BA -Philosophy


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


Brian H. Leinhauser
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Brian H. Leinhauser is founding Partner of MacMain Leinhauser. He concentrates his practice in the areas of labor and employment matters, school law, civil rights, business advising, litigation, and non-profit formation and representation.

His employment law experience includes representing public and private entities, as insurance defense counsel and privately retained, in matters relating to labor relations, collective bargaining negations, personnel and human resources consultation, employment discrimination claims, internal investigations, and general litigation matters. Brian represents employers and individuals in defense of discrimination and harassment cases, administrative agency complaints filed with state and federal agencies, employment contract disputes, employee benefits litigation, heart and lung issues, Wage Payment Collection Act disputes, and FLSA collective actions.

Brian represents private and public education institutions from k-12 public schools to universities and colleges in all phases of their existence. He advises clients on a state and federal law compliance, including Title IX and Title VII. He manages and conducts internal investigations and guides clients on how to address student disciplinary investigations and hearings, while following the directives from state and federal Departments of Education and the Office of Civil Rights. Brian helps formulate policies and practices for clients related to Title IX and student health safety issues.

Brian has assisted charter schools in applications for new charters, hearings before local Boards of school directors, appeals to the Commonwealth Charter School Appeal Board, and defending non-renewal and revocation proceedings. Brian also provides all education institutions with advice on legal issues that face them including regulatory compliance, real estate, litigation, employment, special education, sexual misconduct investigations and allegations, and governance.

Brian represents private sector business and non-profit entities in general consultation matters including employee issues, general corporate governance, real estate matters, and contract formation and compliance. He represents these entities and municipalities and police officers in individual and class action litigation matters.

Brian has spoken at conferences and seminars advising private and public employers in best employment practices, policy review, and matters involving employment discrimination claims and advised school clients on policies regarding student contact. He also has expertise in disciplinary investigations and Title IX and VII enforcement and special education matters. Brian has also been published in DRI’s For the Defense on “The Changing Landscape of Labor Relations” addressing the various pitfalls that face employers with and without a unionized workforce and how to maintain a positive working relationship with employees and their union representatives while maintaining a profitable and productive work environment.


Brian worked his way through college with the help of his family. After graduating from Villanova University, Brian studied as a Seminarian with the Order of Saint Augustine exploring his possible call to ordained ministry. After leaving the seminary, Brian continued his theology studies at Duquesne University and later taught religion and math in the Archdiocese of Philadelphia.

After teaching, Brian pursued his Juris Doctor degree at Duquesne University. Upon graduation, he accepted a position at the firm of Campbell, Durrant Beaty, Polombo & Miller P.C., focusing his practice on public sector labor and employment advising litigation.

In 2007, Brian joined the law firm of Lamb McErlane, where he was an associate in the Appellate Litigation and Labor Employment practice groups. In April 2013, Brian, along with Partner David J. MacMain founded the firm that would become MacMain Leinhauser.


  • Pennsylvania Bar Association
  • American Bar Association
  • Defense Research Institute
  • Civil Rights and Governmental Liability Group
  • Labor and Employment Defense Group


  • Brian H. Leinhauser and Matthew J. Connell Speak at CCAP Conferences
  • Brian H. Leinhauser speaks at 2022 ExecuSummit EPLI Spring Conference regarding Employee Discipline guidance for social media posts by employees.
  • Brian H. Leinhauser speaks at the 2019 Government Liability Seminar for DRI regarding use of “#metoo” evidence in discrimination claims.