Justin Bonsignore began his racing career with go-karts at the age of 8. His father Tom and Uncles Bill and Frank, own and operate one of the top kart racing shops in the country, so for Justin, it was a natural.

In 1997, Justin competed for his first national event at the Rockingham Speedway, in North Carolina, where he finished 13th. Justin did well in go-kart racing with 18 national event wins, 13 poles, 45 top-5 finishes in 81 national starts. He had five straight feature wins and two championships in the same year. He has also won some of kartings most prized races such as Len Sammon's Indoor Kart Race at the Dunkin' Donut Center in Providence Rhode Island and Riverhead Raceway's East End Shootout.

Justin, now 22 years old, has continued his racing career in NASCAR Modifieds at Riverhead Raceway and on the NASCAR Whelen Modified Tour.

Justin started racing stockcars in 2005, in Riverhead Raceway's Charger Division, where he entered into the NASCAR Dodge Weekly Racing Series. In this particular year he ended up finishing third in the championship standings, which is the highest position ever held by a rookie. He was awarded Rookie of the Year by NASCAR.

In 2006, Justin joined the NASCAR Modified Division, where he scored three top-5 and nine top-10 finishes. He also ended up finishing 7th in the standings, which once again was the best ever by a rookie and for the second year in a row he was awarded Rookie of the Year by NASCAR.

In 2007, Justin had hoped to win the Riverhead Raceway Track Championship, but an injury to his wrist prevented this from happening. He did however, get his first stockcar win in 2008 and finished 4th in the NASCAR Whelen Modified Tour.

In 2008, Justin was unable to secure a full time sponsorship which resulted in a more limited schedule. Due to sponsorship woes, Justin did not score a win in 2008, but scored the divisions most top-5 and top-10 finishes enroute to an 8th place points finish.

For the 2009 season, Justin took on more of the ownership role, of the team and decided to run a schedule at Riverhead Raceway which was best fitted for the budget of the team. He experienced his most successful season, performance wise, however, the luck was not there much of the season. Justin was able to break a long winless streak and win the Cromarty Cup 50 lap race in dominating fashion, qualifying on the pole and leading every lap. A few weeks later, the good runs continued and Justin was again able to match a career best of 4th place in the NASCAR Whelen Modified Tour at Riverhead. With these runs, he was able to catch the eye of a man by the name of Ken Massa, who wanted to start a full-time NASCAR Whelen Modified Tour team. In the team's first race together, they scored a 2nd place finish at the Sundance Vacation Speedway in the King of the Mountain 150.

To start the 2010 season, Bonsignore and his newly operated M3 Technology Race team are competing weekly on the NASCAR Whelen Modified Tour and are seeking the Sunoco Rookie of the Year award. So far this season, Justin has two top-5 and four top-10 finishes, including a 2nd place finish at Martinsville Speedway. Justin also won the Coors Light Pole Award and set a new track record at the Bristol Motor Speedway.

Justin has also been very fortunate to appear and represent some of racing's great companies, such as Area Auto, WKA Karting Scene, National Kart News, The Inside Track, Riverhead Raceway's Weekly Program, as well as advertisements promoting products for Horstman Manufacturing, Digatron Data Acquisitions, Bonsignore Kart Shop, and Big Sal's Race Engines.

Justin has also teamed up with companies such as The United Spinal Association and The North Shore Animal League as a spokesperson.