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The firm started in 1925 under the name of Harold S. Irwin.  In 1954, Harold S. Irwin, Jr. came into the practice with his father and Irwin & Irwin law firm was established.  In 1956 Roger B. Irwin joined the firm with his father and brother at which time the firm became known as Irwin, Irwin & Irwin.  The name stayed the same until 1986 when Marcus A. McKnight, III became a partner and the name of the law firm was changed to Irwin, Irwin & McKnight. 

The firm is currently known as Irwin & McKnight, P.C., reflecting the names of its founders and the current majority shareholder, Marcus A. McKnight, III.

Matthew A. McKnight became an associate with the law firm after his graduation from Pepperdine University School of Law in 2004. Stephen L. Bloom merged his former solo practice into the firm in 2007, and he is currently the elected Pennsylvania State Representative for the 199th Legislative District. 

Support staff includes a real estate paralegal, an estate paralegal and four administrative assistants.


MARCUS A. McKNIGHT, III, ESQUIRE
  
Mr. McKnight is the majority shareholder of the Carlisle Pennsylvania, law firm of Irwin & McKnight, P.C.  Mr. McKnight grew up in York County, Pennsylvania where he graduated from Dallastown Area High School in 1970.  He received his undergraduate degree in 1974 from Drew University of Madison, New Jersey, cum laude with specialized honors in economics and his Juris Doctor in 1977 from the University of Pittsburgh School of Law.  Mr. McKnight is admitted to practice law before the Supreme Court of Pennsylvania and the United States District Court of the Middle District of Pennsylvania.  His areas of practice are estate planning, family law, litigation, real estate and municipal law.  He is a member of the Pennsylvania Bar Association, the Cumberland County Bar Association, and is active in the Carlisle Rotary Club. He is a past president of both the Cumberland County Bar Association and the Carlisle Rotary Club. He currently attends the West Shore Evangelical Free Church. 

STEPHEN L. BLOOM, ESQUIRE

Mr. Bloom is currently the elected Pennsylvania State Representative for the 199th Legislative District. He merged his practice with the firm in 2007.  He is a graduate of The Pennsylvania State University (1983) and The Dickinson School of Law (1987), where he was inducted into the Woolsack Honor Society.  He is an author (The Believer's Guide to Legal Issues, Living Ink Books, 2008) & (They’ve Crossed the Line: A Patriot’s Guide to Religious Freedom, God & Country Press, 2013) and frequent speaker on Christianity and the law. He has served as an adjunct faculty member in the Department of Management and Business at Messiah College.  He is the former host of the “Practical Counsel – Christian Perspective” radio program and the founder of the Estate Planning Council of Cumberland County. Mr. Bloom has been actively involved in the leadership of numerous community and ministry organizations, including his church, the Carlisle Alliance Church. He is admitted to practice before the Supreme Court of Pennsylvania, the United States District Court for the Middle District of Pennsylvania, and the United States Tax Court. His legal practice concentrates on estate planning; estate administration; nonprofit, ministry and small business organizations; and real estate transactions.  He is a member of the Cumberland County and Pennsylvania Bar Associations and the Christian Legal Society.  For speaking inquiries please visit Mr. Bloom's personal website.


MATTHEW A. McKNIGHT, ESQUIRE


Born and raised in Cumberland County, Matthew is a graduate of Carlisle High School and received a B.A. in political science from Grove City College in 2001. He obtained his Juris Doctor degree from Pepperdine University School of Law in 2004 and joined the firm that same year.  Matthew  is a member of the Pennsylvania Bar Association, Cumberland County Bar Association as well as past president of the Cumberland County 4-H Advisory Council. He also attends West Shore Evangelical Free Church in Mechanicsburg.  His areas of practice include estate planning, elder law, business law, real estate, and municipal law.

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