Arne Engesæth’s area of focus is contract law, with particular emphasis on projects. His work is related to negotiations and contract drafting, as well as advising in projects and in conflicts. He has also experience in oil and gas contracts, contracting, processing plants, consultancy agreements, IT agreements and real estate, and is often appointed as mediator and arbitrator.

Arne is ranked amongst Norway’s most prominent lawyers in his fields. He is ranked as leading in the category construction in both Legal 500 and Chambers Europe. He is also ranked as one of the leading lawyers in the categories of construction law, offshore business, and oil in Finansavisen's (Norwegian newspapers) attorney examination.