Career
Johansen played for Teie IF in his native Norway before joining the Manchester City Academy system at the age of 16. Johansen has represented Norway at youth international level Hailing from Nøtterøy outside Tønsberg, Johansen made his debut for Teie IF in the 4.
Divisjon at the age of 14.
After training with the Tippeligaen sides Sandefjord and Odd Grenland, he was invited on a trial with Manchester City. Tobias impressed in the trial and got a contract with Manchester City.
Tobias returned to Norway and Kongsvinger in 2010. Johansen was training regularly with City"s first team in the 2010-2011 season, and signed a new two-year contract with the club in May 2011.
He made his debut for the first team when he played seven minutes of the friendly match against League of Ireland XI on 30 July 2011.
After playing regularly for the reserves during the 2011-2012 season, Johansen signed a professional contract with the club in July 2012. He spent most of the season playing in the reserve team, before joining League One side Scunthorpe United on loan in March 2013 for the rest of the season as cover for the injured number one "keeper Sam Slocombe who was out for six weeks with a torn thigh muscle. His debut for Scunthorpe United came in a 1–2 home defeat against Coventry City Johansen played the full 90 minutes.
In January 2014, Johansen joined Norwegian club Sandefjord on a six-month loan-deal where he was reunited with his old goalkeeping-coach from Teie, Hans Petter Olsen.
When signing Johansen, the club stated that they wanted him as their new first-choice goalkeeper, as the first-choice in the previous season, Iven Austbø, had transferred to Viking. Johansen was also linked with a move to Scottish Premiership side Ross County.
But the move had fell through. On March 31, 2015, Johansen signed with Major League Soccer club New York City Football Club. He was loaned to NYCFC"s United Soccer League affiliate club Wilmington Hammerheads on May 11, 2015.
Johansen made his NYCFC debut on June 17, 2015, starting in a United States Open Cup 2(3) - 2(4) loss on penalty kicks against the New York Cosmos.
Johansen has represented Norway at various youth levels, and was in May 2012 training with the senior team in the absence of regular goalkeepers Espen Bugge Pettersen and Rune Jarstein.