Mark F. Bayley has litigated cases in over twenty-five counties in Pennsylvania and is in the courtroom on a daily basis. While he currently involves himself mainly in family law and criminal matters, recent achievements include a $2.1 million civil jury award on behalf of clients in Lancaster County.

Mark is the second attorney in his family. His father, Edgar B. Bayley, worked in a variety of legal roles in Cumberland County beginning in 1964 and retired from his position as Cumberland County Court of Common Pleas President Judge in 2009. Mark's mother, Mary K. Bayley, a registered nurse, retired from her school nursing position with Harrisburg School District in 2006.

Mark was employed as a judicial law clerk to Cumberland County Court of Common Pleas Judge Edward E. Guido from 1999 to 2001 and began his legal practice in Carlisle, Pennsylvania, in 2001. Bayley & Mangan was founded in 2006.

Mark is married to wife, Anne, and his off-duty activities mainly include entertaining three boys, Jackson, Rowan and Leo.