The chairman and CEO of a major media company that owns 23 television stations and 82 newspapers has resigned, Bloomberg reports.

Gannett Chief Executive Craig Dubow resigned for medical reasons, and the company promoted Chief Operating Officer Gracia Martore to succeed him, the story reports.

Dubow is especially well-known in TV circles. He began his 30-year career at Gannett as a salesman at the company’s TV station in Denver, KUSA, and rose to become president of the broadcast division from 2001 to 2005. He then was promoted to lead the entire company.

Dubow has had hip and back surgery and has suffered chronic related issues, according to a spokeswoman. Under Dubow’s leadership, Gannett cut costs as revenue declined in each of the past four years.

Martore, 60, oversaw Dubow’s responsibilities while he was on a leave of absence that was announced last month, the piece notes.