Per Gustav har bred erfaring i kontrakts- og entrepriserett, selskapsrett, finansiering og rettsforhold knyttet til fast eiendom. Han har gjennom sitt arbeid utarbeidet et bredt spekter av kontrakter (på norsk og engelsk). Per Gustav bistår også med generell rådgivning og bistand i tvister vedrørende selskapsrett, og generell kontraktsrett.
| 2015- | Partner, Advokatfirmaet Føyen AS |
| 2007-2015 | Partner, Advokatfirmaet Torkildsen & Co AS |
| 2006-2007 | Ansvarlig advokat, Torkildsen, Tennøe & Co Advokatfirma AS |
| 2001-2006 | Advokat, Advokatfirmaet Sørlie Wilhelmsen ANS |
| 1998-2001 | Christiania bank- og kreditkasse ASA (Nordea Norge Bank ASA) Juridisk seksjon; advokatfullmektig, advokat |
| 1993-1996 | Miljøverndepartementet, Internasjonal avdeling; konsulent |
| 1996 | Cand. Jur., Universitet i Oslo |
«Seasoned litigator Per Gustav Lilleaasen handles a high volume of construction cases, acting for both local authorities and private companies.» – Legal 500, 2024.
«‘Per Gustav Lillaasen and his team were highly qualified.’» – Legal 500, 2024.
«Per Gustav Lilleaasen and his team had a good attitude, and gave good advice.» – Legal 500, 2024.
«The team has a great ability to balance efforts to ensure high-quality results without wasting resources. They have a very strong knowledge of the construction industry and are able to give excellent advice re complex issues.» – Legal 500, 2024.
«Per Gustav Lilleaasen has a reputation for successfully handling the most complex and complicated of matters, both from a technical and legal perspective. I have always found him to be at least one step ahead and an excellent problem solver.» – Legal 500, 2022.
«I would like to emphasize Per Gustav Lilleaasen and Thomas Strömbom for their professionalism. They are outstanding industry experts. They not only have a good theoretical knowledge, but also wide practical experience in this field. Always refreshing and inspiring to work with.» – Legal 500, 2022.
«Per Gustav Lilleaasen is a skilled and unique lawyer.» – Legal 500, 2022.
