Longo got into football when she used to go with her dad, Paul, to watch her brothers, Jason and Julian, play for Eden Football Club. She joined the club which merged with Mt Roskill to become Three Kings United.[6] She received additional coaching at the Wynton Rufer Soccer School of Excellence from 1999 to 2006.[7]
Longo attended Epsom Girls' Grammar School and played for their first XI, winning the NZ Secondary Schoolgirls tournament in 2008 with future international teammates Anna Green and Hannah Wall. This was after the team won the Auckland provincial championships unbeaten.[8]
On 25 October 2019, Longo signed a one-year deal with Melbourne Victory to return to the Australian W-League.[12] She made her first appearance for Victory in their 3–2 win over the Brisbane Roar, playing 74 minutes before getting subbed off in the second half.[13] In September 2021, it was announced that Longo wouldn't return to Melbourne Victory for the 2021–22 W-League season.[14]
In May 2024, Longo returned to New Zealand's Women's South Island League side Cashmere Technical to compete in the 2024 season, where she is one of multiple A-League players who have joined clubs in regional competitions to stay active between A-League seasons.[16][17]
International career
U-17
She scored New Zealand's first goal at the 2008 inaugural FIFA U-17 Women's World Cup although they were effectively eliminated from contention in the 1–2 loss to Denmark, having previously lost 0–1 to Canada in the opening game.[18]
Longo was again included in the U-20 squad for the 2008 Women's U-20 World Cup finals to be played in Chile, featuring in two of their three group games.[19] In 2010, she represented New Zealand at a third Under-20 World Cup, this time in Germany, appearing in all three group games.[20]
National team
Longo at age 15, made her Football Ferns debut in a 0–3 loss to China PR on 14 November 2006, becoming New Zealand's youngest senior football international.[21][22] She then went on to represent New Zealand at the 2007 FIFA Women's World Cup finals in China,[23] where they lost to Brazil 0–5, Denmark (0–2) and China PR (0–2). Longo is the second youngest player to represent any country at a senior FIFA World Cup.[22]
Longo made her 100th appearance for New Zealand in a friendly against the United States in September 2017[26] and is the first player in the world to
compete at all U17, U20, Women's World Cup and Olympic Games tournaments.[21]
In an interview Longo gave in November 2014, she said she lives in Kaiapoi but also spends half of her week in Auckland for national trainings.[27] While in Kaiapoi, she plays for Canterbury United Pride and then spends the rest of her time coaching at the Grasshopper Soccer programme – a non-competitive programme for kids aged 2–10 years, where the focus is on fun and skill development.[27] She said that she
enjoyed working with young children and enjoyed watching them develop.[27]