He began a career in law, being appointed Supreme Court judge in 1828, Supreme Court assessor in 1837 and district stipendiary magistrate (sorenskriver) of Aker in 1848. He had many law-related publications to his name. Such interim governments were established when King Oscar I of Sweden travelled abroad or was illinois
Lasson then served as the fifth Chief Justice of the Supreme Court of Norway from 1855 to 1877.
He died in Kristiania.
He was acting Minister of Justice and the Police from July to September 1852 and October 1852 to April 1853, as a member of the interim governments.