Gudmund is a finance lawyer with specialist experience in shipping, offshore and export financings. He acts for a range of finance providers and borrowers/sponsors on a variety of matters including new financings, leasing transactions, restructurings, work outs and enforcements. He also advises a variety of corporates, particularly in the shipping and offshore sectors, on sale and purchase, charters, building contracts and other commercial matters.

He has spent time on a number of client secondments including to the export finance team of a major international bank, the legal team of a specialised international asset finance bank, a geophysical services company and a leading shipping company. He regularly lectures on shipping and ship finance and has contributed to a number of publications on the subject.

Gudmund is identified as a notable practitioner in Chambers UK 2023 and highlighted for his ship finance expertise. Clients say that "He's an excellent shipping lawyer. He's very experienced and a pleasure to work with." and "He always delivers the assistance we need with quality and speed." Chambers 2023, and that "Gudmund Bernitz always delivers high-quality advice." Legal 500 2023.