Crossmaglen Rangers (1) In 1993 Kernan became manager of
Crossmaglen Rangers. At the time Crossmaglen football was at an all-time low. Three years later in 1996, after the club had won four under-21 county titles in-a-row, Kernan guided the senior side to a first
county championship in 11 years. Crossmaglen went on to claim the
Ulster club title before defeating
Knockmore to win the
1997 All-Ireland club title. In 1997 and 1998 Kernan guided Crossmaglen to two further county titles. The latter win was later converted into a second set of Ulster and All-Ireland titles. In 1999 Cross captured a fourth county title in-a-row as well as a second successive Ulster title. On
St. Patricks Day, 2000 Kernan's side went on to win a third All-Ireland title in four years. Following this victory Kernan decided to retire from club management. He would later return in 2013.
Armagh In 1989 Kernan got a first taste of inter-county management when he served as assistant to the
Armagh manager,
Paddy Moriarty. After Armagh were beaten by the eventual Ulster champions in 1989, 1990 and 1991 Moriarty decided to resign as manager and Kernan also walked away. In November 2001, Kernan was appointed manager of the
Armagh senior football team. No stone was left unturned in preparing the team. Eight months later Kernan's side later went on to win the 2002
Ulster title. This win allowed them to advance to an All-Ireland quarter-final meeting with
Sligo; however, no Armagh team had won a championship game in
Croke Park in twenty-five years. Kernan's side defeated Sligo after a replay before disposing of
Dublin in the All-Ireland semi-final. At half-time during that match Kernan pulled the first of two famous stunts designed to inspire the team. He produced the old Armagh jersey that he wore in the 1977 All-Ireland final, and told his players that this would be their reward. In the subsequent
2002 All-Ireland final,
Kerry were leading Armagh at the interval. During his half-time speech he pulled the second of those famous stunts when he produced his runners-up plaque from the 1977 All-Ireland final and smashed it in the dressing room. Armagh later went on to defeat Kerry by a single point to win their first All-Ireland title ever. In the
2003 Championship Armagh reached the All-Ireland final once again, however this time they were beaten by
Tyrone. Kernan's Armagh side recaptured the
Ulster Senior Football Championship in 2004 against Donegal in the first ever Ulster final to be held at
Croke Park. In 2005 he guided the county to their first ever
National League title, before successfully defending the Ulster Championship against Tyrone. The following year Armagh became the first team since the 1959–1961
Down side to win the Ulster Championship three years in a row. He replaced
Donegal man
Brian McEniff who had held the role since 1982. However, in August 2010, he resigned after a very unsuccessful year with the result of
Galway getting knocked out of the championship early by being defeated by
Wexford.
Crossmaglen Rangers (2) On 27 March 2013, Kernan was reappointed manager of Crossmaglen Rangers.
Ireland In late March 2015, Kernan was appointed manager of the
Ireland international rules football team for the
2015 Series against
Australia. ==Media work==