• 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


  • Chairman of the Operating Board of Directors of the Community YMCA of Eastern Delaware County

Brian H. Leinhauser is a founding Partner of MacMain, Connell & Leinhauser. He concentrates his practice in the areas of labor and employment matters, school law, civil rights, business advising, and appellate cases.

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 negotiations, 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 state and federal law compliance, including Title IX and Title VII.  He has advised clients on managing and conducting internal investigations and 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 has advised clients on Title IX and student 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 and governance.

Brian represents private sector business in general consultation matters including employee issues, general corporate governance, real estate matters, and contract formation and compliance and represents municipalities and police officers in civil rights and other municipal liability matters.

Brian has spoken at conferences and seminars advising private and public employers in best employment practices, policy review, and matters involving employment discrimination claim and advised school clients on policies regarding student contact, disciplinary investigation 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 Beatty, Polombo & Miller, P.C., focusing his practice on public sector labor and employment advising and litigation.

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


  • Pennsylvania Bar Association
  • American Bar Association
  • Defense Research Institute
    • Civil Rights and Governmental Liability Group
    • Labor and Employment Defense Group
  • Pennsylvania Super Lawyer – named Super Lawyer 4 times (2017-present) and previously named Rising Star 5 times in the field of Employment Law


Developments in Union Organization Under State and Federal Law


Brian H. Leinhauser and Matthew J. Connell Speak at CCAP Conferences






A Message to Our Customers About Coronavirus COVID-19:

A Message to Our Clients About Coronavirus COVID-19:

Dear Clients, Colleagues and Friends,
Like all of you, we have spent much attention and effort to determine the most responsible manner to navigate the challenges associated with the COVID-19 health crisis. We continue to follow daily developments prioritizing the health and wellbeing of our employees and their families, while continuing to fulfill our commitment to our clients. Effective Friday, March 20, our physical office will be temporarily closed. Our attorneys and staff will be working remotely and available by e-mail and phone. Please be assured, that we will promptly return all calls that go to our voicemail.

We are confident that the measures we have taken will enable continuous and uninterrupted service to you, while joining in the effort to slow the spread of COVID-19 and meeting our professional commitments. MacMain Connell & Leinhauser remains devoted to fulfilling the needs of our clients, and our team will continue to deliver legal services that are ‘real, practical and excellent’ in this challenging time. Should you have any questions or concerns, we encourage you to reach out to us.

We thank you all for your anticipated cooperation during this difficult period, and wish you and your family good health, protection and safety.

The Attorneys and Staff of MacMain Connell & Leinhauser