O’Donnell, Weiss & Mattei, P.C.

Stephen I. Baer


  • Born and raised in Phoenixville.
  • Represent clients in the practice areas of Criminal Defense, Estate Planning, Wills & Trusts, Estate Administration & Probate, Mediation and Family Law.
  • Award winning attorney, “Expertise- Best Criminal Defense Lawyers in Reading- 2021”, “Main Line Today- TOP LAWYER-2019”.
  • Designated an “Advanced Practitioner” Member of the Association of Conflict Resolution.
  • I am committed to providing compassionate, zealous, and outstanding representation to my clients and care deeply about our community.

Client Testimonial:

“Stephen’s attitude and his years as an experienced attorney helped give me confidence as I walked my husband and daughter through unfamiliar territory.  I knew my family was in good hands with Stephen as our attorney.”  Alice B.

Peer Talk/Review:

“Stephen is calm, cool and collected and gets the job done.” David Megay


Education & Credentials:

  • Temple University Beasley School of Law, Philadelphia, Pennsylvania
    • D. – 1978
  • University of Pittsburgh, Pittsburgh, Pennsylvania
    • A. – 1974
    • Honors: magna cum laude
  • Bar Admissions
    • Pennsylvania, 1978
    • Eastern District of PA, 1981
    • U.S. Supreme Court, 1984


(P) 610-323-2800



Professional Associations:

  • Pennsylvania Bar Association, Member – Current
  • Pennsylvania Association of Criminal Defense Lawyers, Member – Current
  • Pennsylvania Council of Mediators, Member – Current
  • Doris Jonas Freed Family Law Inn of Court, Member – 1992-1998

Pro-Bono Activities:

  • Pro-Bono Award, Chester County Bar Association – 2007
  • Access to Justice Award, Chester County Bar Association – 2015
  • Chairman of the Criminal Defense Section of the Chester County Bar Association- 2015-2010
  • Board of Directors, New Century Bank, Member – 1992-2002
  • Board of Directors, Chester County Bar Association – 1986-1996
  • Solicitor for the Borough of Spring City – 1983-1996
  • President of the Phoenixville Senior Adult Activity Center – 1982, 1983 and 1986
  • Chairman of the Judicial Evaluation Committee, Chester County Bar – 1986-1988


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