The Motion Picture Television Fund’s longtime chief operating officer and exec VP Seth Ellis has resigned and will be departing his post at the end of the week.

MPTF prexy-CEO Bob Beitcher confirmed Wednesday in a statement that Ellis had announced his resignation to the board and staff. “Ellis indicated that he felt that it was in the best interest of the organization that he step down at this time,” he added.

Beitcher, who took over last year as the topper after David Tillman resigned, did not elaborate.

Ellis was with the organization for 12 years — including a turbulent period dating back to early 2009 when the MPTF announced that rising costs amid the recession would force it to shutter its long-term care unit, which had 136 patients at the time, as well as its acute-care hospital. That decision created a barrage of criticism with some questioning the fund’s commitment to its stated goal of “taking care of our own,” but the fund has been rebuilding, announcing earlier this year that it would begin admitting new patients for the first time in three years.

MPTF execs have reiterated that the fund will continue to operate its independent and assisted-care facilities in Woodland Hills and half a dozen health centers in the Los Angeles area, along with modernizing the Woodland Hills campus and expanding its medical and social services for showbiz retirees.

The MPTF is also in the midst of a $350 million fundraising drive that’s reached about two-thirds of its goal. Barry Diller made a $30 million gift in June and Rupert Murdoch donated $20 million earlier this month.