2004

Markus became the Finnish and Swedish Champion and the winner of STCC Formula Ford championship. Led Scandinavian Championship before the last round but finished 2nd overall because did not participate on the last round. Nominated as a ”Young Champion” by Finnish ASN. Tested for Formula BMW and was fastest at several unofficial tests.

2005

Markus finished 7th in championship points with one victory and one pole position. Many crashes resulting to damaged car during the season (12 out of 20 races). He was also 5th in UK Formula Renault Winter Championship, 3rd best qualifier of the championship (3rd, 4th, 9th and 3rd in qualifyings). Markus drove Formula Renault first time ever in free practice of first race meeting.

2006

One victory, fastest lap and pole position. Multiple Driver Of The Day Awards - awarded by Renault Sport. Markus finished 7th in the final standings with best positions 1st, 2nd, 3rd, 2x4th.

2007

In Formula Renault Eurocup, he did 6 starts with best result of second at Hungaroring, while in the Asian series, he did 4 starts with 2 wins and one second place. His 3rd win of the 4 races was later penalized from jumping the start. He joined BCN Competicion in the GP2 Series to replace Sakon Yamamoto who moved to F1 during the season. During his first race, also at the Hungaroring, he was forced to retire when his left shoulder unexpectedly dislocated after 11 laps, which also prevented him from taking part in the second race of the meeting.^[1]

2008

In the 2008 season, Niemelä won the Atlantic Championship with Brooks Associates team, after winning the last two rounds of the season.

2009

Niemelä returned to the series to defend his Atlantic Championship title, this time driving for Newman Wachs Racing. He struggled through the first five races failing to score a podium finish. He switched teams to Jensen MotorSport for the remainder of the season, but failed to find any more success and finished 6th in points.

2010

Niemelä started racing Sprint Cars on dirt ovals. The best result of his depute season was 2nd in a VRA race at Ventura Raceway.

2011

Niemelä raced in selected races in different Sprint Car Championships (USAC West Coast, USAC CRA, VRA, USAC Midget) with an average A Main finish of 4.5 over the season. He also scored his first Sprint Car win.

2014

In November 2014, Niemela suffered a severe accident at Perris Auto Speedway in a sprint car, flipping end over end into the catch fence after an axle broke on his car. While he initially was believed to have suffered only a concussion,^[2] he later revealed he had suffered severe brain injuries in the accident, resulting in the end of his career.

Atlantic Championship