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Our values


rendering the highest quality legal advice to our clients.


honouring the customs and practices of the industries we serve.


providing value to our clients by thinking outside the box.

The Firm

WSCO Advokatpartnerselskab is a law firm specializing in the areas of shipping and transport, energy and offshore, construction, insurance, global trade and litigation and arbitration.

The firm’s primary strengths are our attorneys’ specialist expertise within our chosen areas of law, combined with the team’s ability to collaborate seamlessly on major projects and assignments.Since 2010 the firm’s attorneys have assisted Danish and international clients and handled some of the largest and most complex transactions and disputes within the focus areas of the firm. The partners of WSCO are all attorneys with many years of experience within the firm’s focus areas and are each widely recognized as leading attorneys in their field.

Our clients choose to work with WSCO due to the specialist experience of the firm’s attorneys, our strong client dedication and focus, and our ability to solve our clients’ most difficult challenges.


Sandroos Advokatfirma, which was established in 2010 with a special focus on Energy, offshore and related maritime industries, merged in 2015 with Advokat Jesper Windahl, which for many years has specialized within shipping, maritime and transport.  

In connection with the merger, additional partners were admitted with specialties within the firm’s business areas, whereby Windahl Sandroos & Co. Advokatpartnerselskab was established. The company moved to the address Frederiksgade 7 in 2015.

The law firm later changed its name to WSCO Advokatpartnerselskab, and in 2019, lawyer Christian Werenberg was joined as a partner, thereby expanding WSCO's business areas within construction.

That same year, the law firm moved to its current offices in Dehns Palais Frederiksgade 17.


Each year Legal 500 compile a rating of Danish law firms on the basis of interviews with clients and law offices in Denmark and abroad. These lists rank WSCO as one of the leading law firms in Denmark.

Legal 500 Shipping & Transport 2024, Denmark

WSCO Advokatpartnerselskab is known for its litigation and arbitration work, instructed by Danish and foreign clients to act on contentious matters concerning the arrest of vessels, injunctions and other interim measures in the shipping and transport sector. The group’s transactional work also includes shipbuilding and repair contracts and sale and purchase of ships and registration. Practice head Jesper Windahl is praised as ‘highly skilled, very professional and always works efficiently’.

Legal 500 Energy 2024, Denmark

WSCO Advokatpartnerselskab‘s energy and offshore department works with clients spanning the offshore wind, renewables, biogas, emerging technologies, power-to-X, oil and gas, geothermal and marine industries. The ‘highly skilled’Bo Sandroos heads up the practice group and is noted for his commercial and corporate work and regulatory knowledge; he also has notable experience in Greenlandic law, particular relating to the energy and mining sectors.

Legal 500 Energy 2023, Denmark

WSCO Advokatpartnerselskab‘s energy and offshore practice is known for advising domestic and international contractors on international offshore wind projects, and contractual issues concerning the supply of technology. Standout practitioner Bo Sandroos leads the team, and advises on emerging technology within the renewable energy sector, including power-to-x, CCS and energy island projects. Sandroos primarily provides regulatory, commercial and corporate advice, and specialises in Greenlandic law. Read more

Legal 500 Shipping 2023, Denmark

WSCO Advokatpartnerselskab‘s team uses its ‘extensive knowledge‘ of arbitration and litigation proceedings to advise on both wet and dry shipping issues. The team takes a ‘realistic and creative‘ approach when advising logistics, insurance, and transport companies. The ‘highly skilledJesper Windahl heads up the practice, and often represents domestic and international clients in disputes before the Maritime and Commercial Court of Copenhagen; he regularly handles claims concerning liability for cargo damage. Read more

Legal 500 Energy 2022, Denmark

Led by Bo Sandroos, the energy and offshore practice at WSCO Advokatpartnerselskab has experience handling emerging technologies including Power-to-X systems and energy islands, alongside notable expertise in offshore wind, geothermal and renewables projects and ‘strong capabilities’ in the oil industry. The group handles all aspects of commercial, corporate and regulatory work within the energy sector and has specific experience in Greenland law, with a particular focus on Greenland’s mining industry. Read more.

Legal 500 Shipping & Transport 2022, Denmark

Active in litigation and arbitration proceedings, the shipping and transport group at WSCO Advokatpartnerselskab handles both wet and dry shipping matters. It has particular expertise in liability claims concerning cargo consignment damage and acts for several of Denmark’s leading insurers as well as Scandinavian and English P&I and hull clubs. The ‘excellent’ Jesper Windahl leads the practice. Read more.

Legal 500 Energy 2021, Denmark

The team at WSCO Advokatpartnerselskab handles a variety of corporate, commercial and regulatory matters in the energy sector, and is particularly adept at advising clients on energy infrastructure projects and M&A transactions. Led by Bo Sandroos, the department has a track record in the oil and gas sector and is increasingly prominent in the offshore wind industry; it advises suppliers, contractors and developers on offshore wind projects, with noted expertise in regulatory issues and obtaining licences.

Legal 500 Shipping and Transport 2021, Denmark

WSCO Advokatpartnerselskab specialises in litigation and arbitration work, with notable expertise in liability claims concerning cargo consignment damage. Regularly acting before the Danish courts and arbitration tribunals, the group is spearheaded by the ‘exceptional‘ Jesper Windahl, who also handles transactional matters concerning vessel sales and purchases. Clients include insurers, ship owners, carriers, logistic services providers, bunker suppliers, brokers and banks.

Legal 500 Energy 2020, Denmark

The energy practice at WSCO Advokatpartnerselskab focuses on energy infrastructure projects and M&A transactions in the energy sector, and also leverages the group’s expertise in maritime and transportation law to handle renewable energy projects. The group is particularly praised for its regulatory work and assists with permits and licences for offshore wind projects. Practice head Bo Sandroos is a go-to name for geothermal energy projects as well as oil, gas and mining projects.

Legal 500 Shipping and Transport 2020, Denmark

WSCO Advokatpartnerselskab advises ship owners, businesses, brokers and banks on the sale and purchase of vessels as well as their financing and registration. The firm also acts for insurers on the assessment of insurance liability claims related to the grounding, arrest and collision of vessels. The firm also assists with matters regarding maritime insolvency. Practice head Jesper Windahl is active in dispute resolution, which involves both maritime litigation and arbitration.

Legal 500 Energy 2019, Denmark

WSCO Advokatpartnerselskab is experienced in commercial matters in the oil and gas, drilling, geothermal and wind energy industries. Bo Sandroos leads the team and handles contracts, agreements and transactional work. Contract expert Carsten Tolderlund is also a key name to note.

Legal 500 Shipping and Transport 2019, Denmark

WSCO Advokatpartnerselskab is active in shipping-related disputes; group leader Jesper Windahl recently acted for ERA Transport in a dispute concerning the wrongful delivery of a container, and represented Tryg in a claim against multiple carriers relating to damage to fresh fruit cargo.

Legal 500 Insurance 2019, Denmark

Key insurer clients of WSCO Advokatpartnerselskab include Tryg and XL Insurance, which the group advises on regulatory and liability-related matters. David Rubin is a key figure and highly experienced in contentious matters.

Legal 500 Energy 2018, Denmark

At WSCO Advokatpartnerselskab, ‘very good and responsive’ Bo Sandroos heads the three-partner team that has strengths across the oil and gas and renewable energy sectors. The team recently advised on the development and operation of a Danish solar park. The group has been strengthened through the hire of Carsten Tolderlund from energy company Noreco.

Legal 500 Shipping and Transport 2018, Denmark

Noted for its ‘profound market knowledge’, WSCO Advokatpartnerselskab fields a four-partner team specialising in wet and dry shipping matters. Recent mandates include representing Tryg Forsikring in damage claims related to the loss of containers. Another highlight was assisting an international shipowner with the set-up of a Danish business. The firm’s client base includes DLG, Freja Transport and Topdanmark. A key contact is ‘highly experienced’ Jesper Windahl.

Legal 500 Dispute Resolution 2018, Denmark

WSCO Advokatpartnerselskab represented Norwegian insurer Havtrygd in a product liability case connected to the manufacturing of a gearbox. Practice head Jens Peter Fabricius is lauded for his ‘excellent legal skills’. The team welcomed Frederik Barfod from Njord Law Firm. Claus Seidelin-Prip is now with Homann Advokater.

Legal 500 Insurance 2018, Denmark

WSCO Advokatpartnerselskab’s insurance group regularly acts for insurers and pension funds in liability and compensation cases. The team, under the lead of David Rubin, continues to advise Tryg Forsikring on marine cargo, loss of hire and CAR insurance for wind turbine sector clients. Other key clients are Topdanmark and Gjensidige Forsikring.

Legal 500 Energy 2017, Denmark

Clients rate Advokatpartnerselskabet Windahl Sandroos & Co for its ‘excellent level of service’ across the oil and gas, wind and geothermal energy sectors. Headed by the ‘detail-oriented’ Bo Sandroos, the team assisted a number of exploration and production companies with offshore oil and gas licences in Denmark’s seventh North Sea licensing round and subsequent joint operating agreement negotiations.

Legal 500 Shipping and Transport 2017, Denmark

Advokatpartnerselskabet Windahl Sandroos & Co’s ‘thorough and efficient’ practice handles a wide range of wet and dry shipping matters for insurers, P&I clubs and shipowners, among others. The ‘positive’ and ‘excellent’ Jesper Windahl heads the team.

Legal 500 Dispute Resolution 2017, Denmark

Advokatpartnerselskabet Windahl Sandroos & Co’s ‘precise’ group acts for clients before all levels of the Danish courts, the Danish Building and Construction Arbitration Board and the Danish Institute of Arbitration. The team has been representing an international transport company in a dispute regarding the disclosure of financial irregularities. Clients recommend the ‘outstanding’ Jens Peter Fabricius.

Legal 500 Insurance 2017, Denmark

Advokatpartnerselskabet Windahl Sandroos & Co’s team is led by David Rubin, whose expertise includes insurance claims, reinsurance matters and regulatory issues. Frederik Barfod joined from Njord Law Firm.

Legal 500 Real Estate and Construction 2017

Advokatpartnerselskabet Windahl Sandroos & Co’s construction practice often acts for contractors and property owners in contract negotiations and arbitration. It is headed by Claus Seidelin-Prip and Preben Gamst.

Legal 500 Energy 2016, Denmark

The energy practice at Windahl Sandroos & Co. Advokatpartnerselskab is led by Bo Sandroos, who is ‘easy to cooperate with’, and whose expertise includes energy-related commercial and regulatory matters, particularly in offshore activities.

Legal 500 Shipping and Transport 2016, Denmark

The ‘very competent’ firm Windahl Sandroos & Co. Advokatpartnerselskab is the result of a 2015 merger between Birch Windahl and Sandroos. Recent highlights for the practice include successfully representing major insurers Topdanmark and Tryg before the Maritime and Commercial Court concerning liability claims arising from the transportation of machinery. The group was bolstered by the recruitment of former deputy head of Skuld Copenhagen Michael Boje-Larsen and Jens Peter Fabricius from Brandt & Lauritzen.

Legal 500 Dispute Resolution 2016, Denmark

Formed by the merger between legacy firms Birch Windahl and Sandroos, Windahl Sandroos & Co. Advokatpartnerselskab has seen an increase in disputes involving both international and Danish companies, including product liability cases, maritime arbitrations and commercial disputes. Claus V Seidelin-Prip often represents clients before the Danish courts, including the Supreme Court and the Eastern and Western High Courts.

Legal 500 Insurance 2016, Denmark

Windahl Sandroos & Co. Advokatpartnerselskab handles insurance and reinsurance matters, including regulatory issues and insurance claims disputes. The firm recently assisted Allianz Global Corporate & Specialty with a number of liability and workers’ compensation claims. David Rubin heads the practice.

Legal 500 Real Estate and Construction 2016, Denmark

Windahl Sandroos & Co. Advokatpartnerselskab’s construction practice is headed by Claus V Seidelin-Prip, who often represents owners and contractors before the Danish Building and Construction Arbitration Board, as well as the Danish courts.

Legal 500 Insurance 2015, Denmark

Birch Windahl represents insurers in litigation involving areas such as staff compensation, product liability and professional liability, with clients including Tryg Forsikring and Topdanmark Forsikring. Thomas Birch heads the practice. David Rubin joined from MAQS Law Firm.

Legal 500 Shipping and Transport 2015, Denmark

Birch Windahl’s Jesper Windahl has expertise in ship arrests, collisions and groundings of vessels, as well as cargo claims and insolvency-related issues, among other areas. His team successfully represented The Swedish Club in a case concerning damage to containers aboard a vessel bound for Greenland. David Rubin joined from MAQS Law Firm.

Legal 500 Dispute Resolution 2015, Denmark

Claus Seidelin-Prip joined Birch Windahl from Viltoft in August 2013. His team focuses on construction and commercial disputes related to IT and shipbuilding, among other areas. Jesper Windahl and Thomas Birch are recommended, as is recent arrival David Rubin.

Legal 500 Insurance 2014, Denmark

Birch Windahl is ‘service-minded and cost-effective’. Thomas Birch successfully represented Tryg Forsikring in a personal injury case. Other clients include Topdanmark Forsikring and Crawford & Co. Clients appreciate Jesper Windahl’s ‘high standards and short response times'.

Legal 500 Shipping and Transport 2014, Denmark

'Cost-effective, service-minded’ shipping boutique Birch Windahl fields the ‘knowledgeable, responsive’ Jesper Windahl, who is ‘warmly recommended’. He successfully represented P&I club Gard in a dispute involving the insolvent estate of a charterer, and acted for Lego Systems in a case concerning the theft of consumer goods in the UK and the Czech Republic.

Chambers Europe 2014, Shipping, Denmark

Jesper Windahl of Birch Windahl Law Firm is noted for his knowledge and understanding of this area, and is praised as a skilled and respected practitioner. See our rating

Legal 500 Insurance 2013, Denmark

Birch Windahl’s Thomas Birch provides ‘good, practical advice at a competitive rate’ to insurers and policyholders. He successfully represented Tryg Forsikring in an employers’ liability case. Other clients include Topdanmark Forsikring and IF P&C Insurance.

Legal 500 Shipping and transport 2013, Denmark

Shipping boutique Birch Windahl provides ‘good, practical advice at a competitive cost’. Jesper Windahl successfully represented Tryg Forsikring and XL Insurance in a case concerning theft of electronic consumer goods during transit from Taiwan to Denmark, and advised Apex Bulk Carriers on the termination of a charterparty agreement.

Chambers Europe 2013, Shipping, Denmark

Jesper Windahl of Birch Windahl Law Firm “has real analytical strength, is strong in strategy, and has a good theoretical foundation,” praises one source, whilst another says: “He’s very open and easy to contact. He discusses the case in a way laymen can understand and does a very thorough job.” Windahl recently assisted Tryg Forsikring and XL Insurance Company with a dispute against Geodis Wilson before the Maritime and Commercial Court concerning the loss of containers in transit.

Legal 500 Shipping and Transport 2012, Denmark

The ‘hands-on, service-minded, and cost-effective’ Jesper Windahl at shipping boutique Birch Windahl successfully defended Tryg Forsikring against a $2m claim concerning coverage under a freight forwarder’s liability insurance, and won a landmark Supreme Court case relating to the Danish Merchant Shipping Act for Itella Logistics against Scandlines.

Chambers Europe 2012, Shipping, Denmark

“Clients commend Jesper Windahl of Birch Windahl Law Firm for his service-minded and solution-oriented approach”.

Legal 500 Shipping and transport 2010, Denmark

Jesper Windahl is one of the best lawyers for marine cargo law and handles multijurisdictional disputes”.


“The first time we had the pleasure to work with Bo Sandroos he was advising our client. Because of his thorough understanding of offshore contracting and constructive approach in discussions we requested his assistance with our first offshore substation installation contract under Danish law. We are very satisfied with the clear, practical and to the point advice Bo provided.”

Peter Segeren, Proposal Manager
Seaway Heavy Lifting

“We used Sandroos law firm for the tenders and contracts for construction and installation of the Anholt A platform, our largest offshore wind project so far. Working with our project team Bo Sandroos was extremely helpful by providing legal advice throughout this complex project, which is now complete. Bo was our main external counsel and completed the critical contracts and documents efficiently, within tight time-frames and to our full satisfaction.”

Jens Christian Hygebjerg, Project Director

“Sandroos law firm assists us on contracts, negotiations and other legal tasks in Rig Projects. Quality work is delivered every time, typically within short deadlines, and Bo Sandroos has skillfully helped us close several of our largest transactions.”

Hans-Peter Jørgensen, Vice President, Rig Projects
Semco Maritime A/S

“We use Sandroos law firm for legal work in our marine and offshore projects. The firm delivers quality work on some of our most critical issues. Being responsive at all times, Bo Sandroos serves as a legal and commercial advisor to our operations and management team, and we are very pleased with this relationship.”

Søren Mikkelsen, Managing Director
Nordic Offshore Marine A/S

“Bo Sandroos has prepared contracts and tendering documents for WellPerform ApS, and the firm’s legal work is very professional. Sandroos law firm meets or exceeds our expectations even under the most demanding circumstances.”

Søren Lundgren Jensen, Director
WellPerform ApS

“Sandroos has provided timely and efficient legal advice in connection with our large R&D efforts in Eltronic. Bo Sandroos’ understanding of the offshore and marine sectors, and his experience in law and contracts, is of great value to technology companies and innovators.”

Anders Therkelsen, Business Unit Manager, Oil & Gas
Eltronic A/S

“Bo Sandroos took our management team through a workshop on offshore contracts and negotiations. Bo is a competent and dedicated trainer with a deep knowledge of the offshore industry, and his advice was practical and easy to implement.”

Michael Klysner, Director
Danfoss HPP Oil and Gas


These TERMS AND CONDITIONS (02-21) govern any assignment undertaken by WSCO unless otherwise agreed in writing. This also applies to the law firm Werenberg Aps (CVR 40178767), which is in an office partnership with WSCO Advokater.

Key facts

Our lawyers are admitted to practice law by the Danish Ministry of Justice and are members of the Danish Bar and Law Society. Our contact information is:
WSCO Advokatpartnerselskab
Frederiksgade 17
DK-1265 Copenhagen K
CVR No. 37061972
Phone: +45 35 25 38 00

WSCO is covered by a professional liability insurance and has provided a guarantee in accordance with the rules of the Danish Bar and Law Society.
Our liability insurance covers any legal practice, regardless of where the practice is being conducted. The insurance and guarantee have been taken out with Tryg Forsikring A/S, Klausdalsbrovej 601, DK-2650 Ballerup.

Disputes with WSCO with respect to the legal services provided are subject to Danish law and the Danish Courts have exclusive jurisdiction.

When WSCO accepts a matter for a client, we clarify whether public legal aid or legal expenses insurance is available under applicable law or the client’s insurance. If our fee is to be paid out of public funds or by an insurance company, preliminarily or finally, the client will be advised of the principles for determining the fee, etc. and of the potential consequences for the client.

Client funds are inserted in the client account of Nordea Bank and is a part of the client’s total guaranteed sum covered under the Danish guarantee for client funds.

WSCO is subject to the Danish Act containing anti-money laundering and anti-terrorism financing measures. Under the Act, we are required to obtain and keep client identification records for five years. Clients are required to provide their name, address and civil registration (CPR) number or Central Business Register (CVR) number when a new matter is opened and also, where necessary, documentation. Businesses also have to provide ownership information and documentation.

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