Christian Flemmen Johansen was an associate and subsequently a partner at Elden Advokatfirma for more than 17 years.
In 2023, Mr Flemmen Johansen and colleagues from Elden Advokatfirma founded Flemmen & Co.
For several years, Mr Flemmen Johansen has been ranked among Norway's leading lawyers in Finansavisen's annual lawyers' survey. In 2020, he was named "the most promising talent among the white-collar lawyers", and during the period 2022–2026, he has been listed on one of the survey's principal rankings, among the best lawyers in Norway.
Mr Flemmen Johansen serves as a legal author for Karnov and has extensive trial experience across a broad spectrum of cases. He has particular expertise in private law, dispute resolution, negotiation and criminal law. He regularly advises a number of larger commercial clients on real estate, employment, corporate, and contract law, and in recent years has also handled a substantial number of cases in the fields of inheritance and probate.
He further has considerable experience in criminal law, where he is regularly engaged in both major and minor criminal proceedings. For several years, he has been ranked among Norway's leading younger lawyers in Finansavisen's annual lawyers' survey within the field of financial crime, and was highlighted in 2017 as one of the legal talents of the year. In 2020, he was named "the most promising talent among the white-collar lawyers", and from 2023 to 2026, he was listed on one of the survey's principal rankings, among Norway's leading lawyers in the field of financial criminal cases.
Mr Flemmen Johansen has acted as defence counsel in a number of substantial criminal cases, including the Tordenskjold case, Thule Drilling, the Unibuss case (alleged corruption), the Oslo Catholic Diocese case (alleged fraud), the "Property Magnate" case (alleged bank fraud), the Jemtland case (alleged murder), the head-teacher case (in the Court of Appeal), the Skattefunn case (alleged tax evasion), the establishment of e-scooters in Norway, the closure of the fur-farming industry (compensation law), the Nortura case (alleged corruption), the Thune case, the Husbanken case (alleged bank fraud), the Finance Cowboy case (alleged aggravated money laundering), the crab-factory case (alleged insurance fraud), the Nordea case (alleged corruption), the DNB case (alleged fraud/corruption), the Finance Cowboy case, and the so-called Crypto Fraud case (also referred to as Norway's largest fraud case), among others.
He also has extensive experience with cases before the Norwegian Press Complaints Commission (PFU) and the Broadcasting Council (NRK), and regularly works closely with various agencies, private investigators, and others.
Mr Flemmen Johansen also serves as an external examiner at the master's level at the University of Oslo and holds board positions in the real estate sector and in charitable foundations. He occasionally undertakes pro bono assignments for individuals in difficult life circumstances who have no other means of obtaining legal assistance.