Born in Lansing, Michigan, Lambo moved with his family to Crystal Lake, Illinois, when he was a small child.

[citation needed] He played club soccer for the Chicago Magic before moving to Middleton, Wisconsin, in the summer of 2005, where he attended Middleton High School for less than two months before signing a Generation Adidas contract and joining the USA Residency Program in Bradenton, Florida.

[2][3] In 2006, and at the age of 15, he spent the summer training with Premier League club Everton during their tour of the United States on the recommendation of USMNT international Tim Howard and was invited to Finch Farm, before being offered a professional contract on the provision that he could secure an EU passport due to his Greek heritage.

[citation needed] Lambo was loaned to USSF Division 2 Professional League expansion team FC Tampa Bay for the 2010 season.

After turning down offers from the NASL and the chance of becoming a MLS pool goalkeeper, he retired from professional soccer at the age of 21.

[11] Lambo made two appearances for the United States U-17 national team during the 2007 FIFA U-17 World Cup after starting the competition as a substitute.

He made his debut in the third and last group stage match against Belgium, playing the whole game and keeping a clean sheet against a side that fielded future Premier League players Eden Hazard and Christian Benteke,[12] and was the goalkeeper in the 2–1 loss against Germany in the round of 16.

[19] On May 2, 2015, after going undrafted in the 2015 NFL draft, Lambo signed a contract as a free agent with the San Diego Chargers.

He displayed a strong leg during exhibition games, while Novak did not have a touchback in the final half of the 2014 season.

[28] On September 2, 2017, Lambo was released by the Chargers after losing the starting kicker job to rookie Younghoe Koo.

[30] On November 12, 2017, Lambo made a game-winning 30-yard field goal in overtime to give the Jaguars a 20–17 win over the Los Angeles Chargers.

[45] On December 15, Lambo accused first-year Jaguars head coach Urban Meyer of kicking him in the leg during warmups before the team's final preseason game.

[47] He later filed a lawsuit against the team alleging that Meyer created a hostile work environment and the Jaguars did nothing to stop it.