He returned to the papers in 2010 to serve as the chief operating officer. During an interview on Friday, Hall said the company's new owners have "no plans to close the Daily News."
Hall said he wants to reach out to PMN's readers and advertisers to gauge their feelings about the newspapers and its website, and to assure them that the company is finally stable after experiencing four ownership changes in six years.
Osberg said he believed it was the "right time for me to step aside, so that our new owners can move forward with a new leadership team."
Osberg said he will serve for the foreseeable future as an adviser to PMN on digital strategies and advertising sales, while he considers what to do next.
"We are pleased that Greg has agreed to continue to work with the company to drive advertising sales and help formulate digital strategies," Lewis Katz, one of PMN's managing partners, said in a statement. "And we are very confident that the company will thrive under the seasoned leadership of Bob Hall, who is known and respected throughout the industry as a first-class professional."
Osberg said that he took the publisher's job believing that it would only last for two years, given the previous hedge-fund owners' predilection for selling properties soon after they acquire them.
Osberg said he focused on trying to find local investors who could provide the company with some long-term stability, while trying to get the company to develop digital initiatives.
Contact David Gambacorta at 215-854-5994, firstname.lastname@example.org, or on Twitter @dgambacorta.