German attacking midfielder Marco Stiepermann joined Norwich on 6th August 2017. He was given the number 18 shirt.

Stiepermann began his playing career with Borussia Dortmund's youth team before being promoted to their reserve team (Borussia Dortmund II) in 2008/09. He made his first start for the main Borussia Dortmund team, in the Bundesliga, on 13th December 2009 against Wolfsburg. He want on to make a further six appearances.

In May 2011, he joined Alemania Aachen on loan until the end of the 2011/12 season, making 21 appearances and scoring twice.

On 29th May 2012 he moved to Energie Cottbus for 200,000 euros. He made 56 appearances for them over the next two seasons, scoring seven goals. Upon their relegation at the end of the 2013/14 season, he activated a release clause in his contract and joined SpVgg Greuther Fürth. He made 61 appearances, scoring nine goals.

On 16th June 2016, he moved to VfL Bochum. He scored once in 31 appearances before joining Norwich

He had been capped by Germany at every level from Under-15 to Under-20.

Stipermann made his Norwich debut as substitute in the 2-0 win over QPR on 16th August 2017 and his first start against in the 4-2 away defeat to Aston Villa on 19th August. Stieperman scored his first goal for Norwich in the 3-1 defeat at Cardiff on 1st December 2017. He finished the season with 27 appearances.. The following year saw him make 46 appearances, scoring 10 often vital goals as Norwich won the Championship title and promotion to the Premier League.

On 17th June 2020 Marco reported that he was the Norwich player who had tested positive for Covid-19 but that he had had two further tests which were negative and that he could return to first team training (but would not be eligible for the game versus Southampton on 19th June 2020). Stieperman finished the season with 27 appearances, taking his tally to 100.

He made 19 appearances in 2020/21 scoring once as Norwich won the Championship title. Much of the campaign was missed due to an inner ear problem (Epstein-Barr virus)

On 30th June 2021 Norwich announced that Marco would be leaving the club by mutual consent. He was entering the final 12 months of the deal he signed in 2019. He said “When I first joined Norwich I never expected the amazing four years that followed," he said. "I have found my second family in Norfolk and I learned so much about how amazing the football club is. It’s a big family.  I’ve been fortunate enough to experience two promotions and have been able to play in the Premier League. It has been the greatest time of my career.  Leaving the football club, I think you can say it’s more of a friendship I have with the coach. I owe him and Stuart Webber so much. They always believed in me and gave me their trust. For the supporters, I can only say thank you. Seeing them each and every home game in a full stadium was amazing and something I had never really experienced in Germany. I have been lucky to have made some great memories with them and I thank them for their support and backing. Leaving the club, I will now always be a Canary. Before I was just black and yellow. I will now always be black, yellow and green.”

He then returned to Germany with his family, where he continues to get treatment, and any prospect of a return to professional football remains on hold. On 15th July 2021 he revealed "I didn't want to sit out the contract, I wanted to get really healthy again and then attack things again. I'm glad the club agreed to terminate the contract. Now I don't feel any pressure and can decide for myself when I'm ready for a new challenge. In the high stress phase during games and training, I kept getting dizzy spells. For half a year I didn't know what was wrong with me and no one could help me. At the end of 2020, the Epstein-Barr virus was diagnosed and the doctors assume that I also suffer from long Covid. There were also a few symptoms such as severe headaches and exhaustion. I went to the neurologist and he thought long Covid was the only explanation for my complaints. Other viruses would not settle in this way."

On 17th August 2021 Stiepermann signed a one year deal with German second tier side SC Paderborn. Colleagues will include Dennis Srbeny.

On 16th June 2022 Stiepermann dropped into the German fourth tier signing for Wuppertaler SV. He had played 15 games for Paderborn, scoring three goals

On 22nd February 2023 it was announced that Stiepermann, along with his brother Marcel, would take charge at German fifth tier side ASC Dortmund. He'll also feature for ASC as a player-coach when current coaching duo Dennis Hubner and Mauritz Milsner move on. ASC sporting director Samir Habibovic said: "We have been in contact with Marco Stiepermann for a very long time and have become more and more specific. We would like to take the next development step together with him. We are very happy that in Marco and Marcel we were able to win two full-blooded footballers for ASC 09, whose personal and content-related ideas match those of our club."