Sondre is affiliated with the department of construction, and works broadly within the disciplines of construction law and housing construction. He is educated at the University of Oslo with a specialization in construction, company law and negotiations. Sondre also has a versatile background with studies in economics and pedagogy, as well as work experience from private companies.
| 2025- | Senior Associate, Advokatfirmaet Føyen AS |
| 2021-2025 | Associate, Advokatfirmaet Føyen AS |
| 2021- | Board memeber, Dotterud Eiendom AS |
| 2021 | Trainee, Advokatfirmaet Føyen AS |
| 2016-2021 | Secretary & Receptionist, Wikborg Rein Advokatfirma AS |
| 2021 | Master of Law, Universitet i Oslo |
| 2014-2015 | Pedagogy, Høyskolen i Lillehammer |
| 2012-2014 | Economics, Høyskolen i Lillehammer |