Longtime Fox News communications exec Brian Lewis was fired on July 25 following an extensive internal investigation. His termination was first reported Tues by The Hollywood Reporter. A company spokesman said Lewis, who joined the net before its launch in 1996, was terminated for cause, “specifically for issues relating to financial irregularities, as well as for multiple, material and significant breaches of his employment contract.” Lewis was named evp, corp communications in 2006. — Atlantic Broadband named former NBCU exec Heather McCallion as vp, programming. It also announced that Lightower Fiber Networks ' Leslie Brown will replace Bartlett Leber as svp and gen counsel. Leber has been with Atlantic since its inception and is moving on to new opportunities.