Firm Profile > SIRIUS advokater > Copenhagen, Denmark

SIRIUS advokater

Denmark > Environment Tier 2

Skilled in public law matters, SIRIUS advokater primarily advises large public authorities and municipalities on administrative law, environmental law and planning law issues. The practice also handles nature protection, climate change and expropriation mandates, alongside environmental litigation and agriculture-related matters. The practice is headed up by Søren Stenderup Jensen and Kurt Helles Bardeleben, who joined in 2019 from DLA Piper Denmark.

Practice head(s):

Søren Stenderup Jensen; Kurt Helles Bardeleben

Other key lawyers:

Michael Vindfeldt

Key clients

Københans Lufthavne A/S (CPH)

ELF Development A/S

NCC Industry A/S

Trelleborg AB

Telenor A/S

Teliam, Filial af Telia AB

Nordic Waterproofing A/S

Hessel Pharma ApS

Municipality of Køge

Arwos Forsyning A/S

Din Forsyning A/S

SK Forsyning A/S

NK-Forsyning A/S

KLAR Forsyning A/S

Oxfam IBIS

Clearidium A/S

Municipality of Gladsaxe


UTF Holding ApS

Taasinge Elementer A/S


Brøndby Fjernevarme

Denmark > Employment Tier 3

SIRIUS advokater handles the employer and employee aspects of employment law issues. Pernille Backhausen leads the ‘sharp, fast, attentive, devoted and on-point' team, which has a track record in investigations, litigation, mediation and arbitration proceedings relating to severance agreements and the termination of employment contracts. The employment group was bolstered in 2020 by the arrivals of Peter Breum and Jacob Goldschmidt from Elmer & Partnere Advokater.

Practice head(s):

Pernille Backhausen

Other key lawyers:

Benjamin Lundström; Peter Breum; Jacob Goldschmidt; Marc Malmbak


‘Sharp, fast, attentive, devoted and on point.’

‘Marc Malmbak is exceptionally attentive to the details of every situation, we have consulted him through many years for the establishment of several companies, a foundation and projects and issues of many kinds. He solved all tasks with strong engagement and always on point.’

Key clients


Roskilde Festival and Roskilde Festival Charity Society

Bikuben Foundation

Medpro Group

BLS Capital Group

The Danish School for Authors

SAS Institute A/S

Per Moesgaard


Connect Denmark

Simple Revolution

PROSA labour union

Naturkraft Foundation

Novavi Foundation



The Danish Institute of Arbitration

The Danish Mediation Institute

The Danish Court Administration

The Danish Arbitration Board

IDA – The Danish Society of Engineers

DJØF (trade union within the areas of law, economics and more)

Danske Bioanalytikere

Lærernes Centralorganisation


Danmarks Lærerforening

Dansk Magisterforening

Foreningen af Speciallæger






FOA-A kasse


Danmarks Lærerforenineg


Frie Skolers Lærerforneing



Denmark > Energy Tier 3

Noted for its public law expertise, SIRIUS advokater’s energy practice has considerable expertise in regulatory issues, acting for district heating, natural resources and oil and gas companies, as well as public utility clients including water, wastewater and waste businesses. Headed up by Søren Stenderup Jensen, the group is particularly adept at advising state and semi-state-owned energy and utility companies, and local municipalities. In addition, it has a track record in contentious energy matters and energy infrastructure projects.

Practice head(s):

Søren Stenderup Jensen

Other key lawyers:

Kurt Helles Bardeleben


‘They give excellent advice, seen from a broader perspective, and on very short notice.’

‘Søren Stenderup Jensen and his team have a rare knowledge of the aggregate industry and the legal complexities connected. He will, in my experience, look for a way to avoid a costly legal battle.’

‘I think that Sirius is a truly remarkable firm with the clients’ interests at the centre of their planning and with the lawyers taking a holistic approach to their legal practice with their core values always a focus.’

Key clients

VEKS, Vestegnens Kraftvarmeselskab

Arwos Forsyning A/S

Brøndby Fjernvarme

SK Forsyning A/S

KLAR Forsyning A/S

Evida Nord A/S

Din Forsyning A/S

Municipality of Køge

Municipality of Hvidovre

Municipality of Allerød

The Capital Region of Denmark

ELF Development A/S

Københavns Lufthavne A/S

Denmark > Real estate and construction Tier 3

SIRIUS advokater has a track record in public building and construction projects including PPP and social housing work, leasing issues, planning and environmental law matters, contractual mandates, and dispute resolution. Liv Helth Lauersen specialises in procurement issues, Joachim Ørum Petersen focuses on real estate transactions and project developments, and 'experienced litigator' Michael Vindfeldt frequently represents foreign contractors in Danish courts.

Other key lawyers:

Michael Vindfeldt; Liv Helth Lauersen; Kurt Helles Bardeleben; Veronica Wolthers-Petersen; Søren Stenderup Jensen; Joachim Ørum Petersen


‘A small but very hands-on real estate practice with good expertise.’

‘In seconds, they understand your situation and offer help without any delay.’

‘Outstanding service by phone, mail and in meetings. The team always deliver the right service in the situation. As a customer, you always got the feeling that you get a very personal service.’

‘Very, very good in their area.’

‘Easy communication and made themselves available when required. Had a commercial approach to the process allowing us to focus the process on the relevant points/issues than needed to be resolved.’

‘The team has a very “low-hierarchy” approach and is easy to work with.’

‘Michael Vindfeldt is the key person in their construction team. He is an experienced litigator, that will defend his client all the way.’

Key clients

The Danish Building Defects Fund

Instalaciones Inabensa SA

CSK Stålindustri A/S

Faxe Kommune

DSV Road A/S / DSV Panalpina A/S

AKF Holding A/S

COBE arkitekter

Elindco A/S


SK Forsyning A/S

Taasinge Elementer A/S

Entreprenørfirmaet Einar Kornerup A/S

UTF Holding ApS

UTF Invest Nordsjælland ApS

Denmark > Dispute resolution Tier 4

SIRIUS advokater regularly represents clients in litigation and arbitration proceedings and mediation processes, with particular expertise in matters arising from the real estate and construction, environment, public utility, local administrative and infrastructure sectors. It also has experience in employment and labour law claims, including executive compensation and benefits disputes. Benjamin Lundström and Søren Stenderup Jensen are the key contacts.

Practice head(s):

Benjamin Lundström; Søren Stenderup Jensen

Denmark > Commercial, corporate and M&A Tier 5

SIRIUS advokater regularly handles capital investment matters, M&A transactions, commercial contracts and other general corporate issues. The group is jointly led by Joachim Ørum Petersen, Gitte Løvgren Larsen and Olaf Carl Ehrenskjöld, who joined in early 2020 from Gorrissen Federspiel. Clients include national corporations, multinationals and private equity and venture capital funds.

Practice head(s):

Joachim Ørum Petersen; Olaf Carl Ehrenskjöld; Gitte Løvgren Larsen

Other key lawyers:

Benjamin Lundström

Key clients

e-supplies a/s

H.W. Larsen A/S

Roskilde Festival Charity Society

Creativ Company A/S

Calldorado ApS

Nordic Corporate Investment A/S


Jespers Torvekøkken ApS

Spring Nordic ApS and CAT Fonden

Carve Consulting P/S

BLS Finans A/S /BLS Capital Fondsmæglerselskab A/S

Bikuben Fonden

Medpro Clinic Sweden AB

Nordic Waterproofing A/S

Taasinge Elementer A/S

Kvadrat Soft Cells A/S

Fire Eater A/S

CEMS ApS and subsidiaries

Thiim A/S

Schades A/S and subsidiaries

EPAM Systems ApS

Nordic Solution A/S

Simple Revolution ApS


WorldTicket A/S

Wolters Kluwer/CT Corporation

Martil Holding ApS

Connect Denmark

Nil Technology ApS

Fingerprints ApS


GreenGate Europe A/S

The firm: SIRIUS advokater was founded some 12 years ago by Pernille Backhausen. The overall goal of SIRIUS advokater is to deliver clear legal solutions precisely reflecting our clients’ needs. We believe that this is best done by acting in a professional and personable fashion both internally and externally. We are strongly committed to continuous training and treating each other with respect, supporting a proper work life balance and being a responsible player within society.

SIRIUS advokater has grown considerably over recent years and now has more than 35 lawyers.  For example, on 1 July 2019  7 lawyers, including two partners joined SIRIUS advokater from DLA Piper. Due to its growth, SIRIUS advokater moved to new and larger premises in the autumn of 2018.

Areas of practice: SIRIUS advokater is a specialized law firm that has exceptional qualifications to carry through clients’ legal challenges within our fields of specialization. The partners are very experienced within the fields in which they work; yet they are curious and committed to expand their  legal knowledge so that the firm’s clients have access to a broader range of advice.

Department Name Email Telephone
Associations and Foundations - Charity Law Kim Pedersen
Associations and Foundations - Charity Law Aleksander Pilgaard
Corporate Law and Mergers and Acquisitions Joachim Ørum Petersen
Corporate Law and Mergers and Acquisitions Benjamin Lundström
Construction Law, Procurement Law, Real Estate and Commercial Leasing Liv Helth Laursen
Construction Law, Procurement Law, Real Estate and Commercial Leasing Michael Vindfeldt
Dispute resolution - litigation, arbitration, mediation and amicable settlements Benjamin Lundström
Dispute resolution - litigation, arbitration, mediation and amicable settlements Søren Stenderup Jensen
Employment and Labour Law Pernille Backhausen
Employment and Labour Law Benjamin Lundström
Insurance and Compensation Helle Hald
Insurance and Compensation Kim Pedersen
Intellectual Property Law Gitte Løvgren Larsen
Tax Kim Pedersen
Public regulation - Environmental law - planning law Søren Stenderup Jensen
Public regulation - Environmental law - planning law Pernille Backhausen
Commercial Contracts Gitte Løvgren Larsen
Danish and other Scandinavian languages