In 1975, the Donegal County Board ousted McEniff as manager. In 1975, he assisted as a mentor the
Sligo county team that won that county's second
Connacht Senior Football Championship title. He later returned as Donegal manager, for the first time as a non-playing member of the team. He was manager again by late 1982. They narrowly lost to
Galway in the
1983 All-Ireland Senior Football Championship semi-final. He helped Tyrone club Carrickmore, where his mother was from, when they were struggling against relegation in 1983 and 1986. McEniff returned as Donegal manager in 1989, succeeding
Tom Conaghan. McEniff's success in
Gaelic games culminated when he led his native Donegal team to glory over
Dublin at
Croke Park in the
1992 All-Ireland Senior Football Championship final. It was shortly before this match that McEniff was informed that the brother of one of his players
Joyce McMullin, had died from cancer. McEniff managed
Ireland for the
International Rules Series of
2000 and
2001. McEniff departed as Ireland manager in 2001. He soon returned for a last outing as Donegal manager. He was chairman of the Donegal County Board in late 2002, but could not find a manager, so he did it himself. In 2003, he led Donegal to the All-Ireland SFC semi-final. During his final time as manager, McEniff called such players as
Neil Gallagher,
Rory Kavanagh,
Karl Lacey and
Eamon McGee into the senior county team for the first time, in late 2003. McEniff later denied this, though Louth County Board chairman Padraic O'Connor said McEniff would be a "great capture" and would not be paid. McEniff managed his local club in the
2013 Donegal Senior Football Championship, taking over from Joe Keeney after his resignation and filling the position in his 71st year. McEniff guided both
Jim McGuinness and
Declan Bonner, his most noteworthy successors as Donegal manager, into management.
Management style Personal connections formed a critical part of McEniff's management style, so much so that when
Declan Bonner brought his wife to
Austria on their honeymoon McEniff maintained regular contact. ==Other ventures==