Scored for N. Ireland in 3-1 win v Norway at Mourneview Park in November 2011.
Signed for Glentoran 10 May 2012.
Re-joined Linfield - March 2013.
Kirsty was called up to the Northern Ireland Under-19 women’s squad for the 2012/2013 UEFA European Women's Under-19 Championship – elite round – Group 5 mini tournament in Portugal. Games against Iceland, Portugal and Finland in April 2013.
"We were delighted to welcome back Kirsty McGuinness. Kirsty deserves all the plaudits she's got. She was here as a child and she's matured into a young woman of 18 years of age with 15 or 16 international caps and numerous youth international caps. A very exciting player, fast, direct and a goalscorer and we're delighted to have her back from Glentoran." - Neil Morrow - May 2013.
Full international v Bosnia - October 30, 2013 at Mourneview.
Scored 2 goals in County Antrim Final triumph 4-0 v Glentoran - Aug. 2013 and scored once in Irish Cup Final triumph 2-1 v Crusaders - Sep. 2013.
Scored for Northern Ireland in 2-0 win v Kazakhstan and 3-1 defeat by Ukraine - both in Turkey - in Feb/Mar 2018.
Appointed Linfield captain - April 2019.