Mr. Lockman was named President and Chief Executive Officer of the Pennsylvania Cable Network in February 1999. He joined PCN as Vice President and Chief Operating Officer in November 1994 after more than fifteen years with C-SPAN. One of C-SPAN's original four employees, he served more than ten years as that network's Vice President of Operations.

At the time he joined PCN it was a struggling instructional network which he quickly developed it into the nation’s pre-eminent state cable network built on the C-SPAN model.

During his tenure at C-SPAN, Mr. Lockman produced and directed the first live television coverage of the Iowa presidential precinct caucuses, directed C-SPAN's first live coverage of the Democratic and Republican National Conventions, and produced C-SPAN's coverage of the aftermath of the 1991 military coup in the Soviet Union.

Mr. Lockman is a founding board member of the Pennsylvania Press Club and served for three years as its president.  He is also a founding board member of NAPAN, the National Association of Public Affairs Networks, and a member of the Pennsylvania Bar Association Bar/Press Committee.

Since 1996 he has been on-air host of the weekly interview series “PA Books”, and is a frequent host of the “PCN Call-In” program. He is author/editor of five books, PCN Tours released in 2003, World War II: In Their Own Words and Pioneers of Cable Televisionboth released in 2005, World War II Reflections released in 2009 and Arlen Specter: An Oral History, released in 2016.