SIRIUS advokater > Copenhagen, Denmark > Firm Profile

SIRIUS advokater

Denmark > Environment Tier 2

Focusing on general public law, SIRIUS advokater‘s environmental practice handles issues relating to planning, nature protection, climate change and expropriation. Led by Søren Stenderup Jensen and Kurt Helles Bardeleben, the team primarily advises local municipalities and is retained by several public utility companies.

Practice head(s):

Søren Stenderup Jensen; Kurt Helles Bardeleben

Other key lawyers:

Michael Vindfeldt


‘They provide excellent on-the-spot counsel, as well as highly professional handling of complex cases.’

‘Calmness and deep insight in legislation.’

‘Knowledge and insight – experience in the field for many, many years.’

Key clients

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

Clearidium A/S


UTF Holding ApS

Taasinge Elementer A/S


Brøndby Fjernevarme

Evida Nord A/S

Municipality of Dragør

FSK Foreningen Skaansomt Kystfiskeri

Municipality of Odsherred

Work highlights

  • Obtained an injunction case for the municipality of Køge before the City Court of Roskilde and the High Court for Eastern Denmark against a landowner’s illegal construction of an amusement park.
  • Advised Hvidovre Kommune on the major land reclamation project ‘The Islets’.
  • Advised Arwos Forsyning and DIN Forsyning on the utility aspects of Google and Facebook data centres in their supply areas as well as other major projects, including Power 2X Project in Esbjerg.

Denmark > Real estate and construction Tier 2

Social housing is a particular area strength of the real estate and construction practice at SIRIUS advokater. The team also has extensive negotiation and litigation experience, including acting in arbitration proceedings in construction law and handling issues relating to the Danish Rent Act. Key names to note are construction law specialist Michael VindfeldtKurt Helles Bardeleben, who advises on PPP projects; and Joachim Ørum Petersen, who focuses on real estate transactions. Liv Helth Lauersen departed to Bruun & Hjejle in 2022.

Practice head(s):

Michael Vindfeldt; Kurt Helles Bardeleben; Joachim Ørum Petersen


‘All partners and employees manage to explain difficult legal dilemmas in a simple and clear way. You always feel you are in good hands.’

‘The firm has always proven to be fast and responsive to requests. Furthermore the knowledge presented from staff has been very helpful. The company comes with recommendations from me.’

‘The team is a very serious and dedicated team with great experience. The team quickly identify issues and help solve them.’

‘Sirius Advokater is a market leader, highly recognized and respected for its qualifications. Apart from being experts in their field, they understand their clients needs and business model, and present exactly the solution that fits the clients individual needs.’

‘Michael Vindfelt is strong in negotiations and will go the extra mile.’

‘I would recommend Joachim Ørum Petersen as he certainly stands out. Joachim is highly experienced and qualified within Real Estate transactions and commercial lease agreements.’

Key clients

The Danish Building Defects Fund

Instalaciones Inabensa SA

CSK Stålindustri A/S

Faxe Kommune, municipality

DSV Road A/S / DSV Panalpina A/S, DSV Road Holding ApS and other companies within the DSV Panalpina Group

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

Stay Properties ApS

Esbønderup Invest ApS

Viggo Pedersen & Søn A/S Byggeentreprise

Nectar Asset Management ApS

Protica Development A/S and Procita Invest A/S

Sund & Bælt Holding A/S

Københavns Kommune

Køge Kommune


Allerød Kommune


2M El-Installation A/S


Hein 1 ApS


Athena Partners ApS

Rambøll Danmark A/S

Overbyen Arkitekter

Høje Taastrup Forsyning

Ejendomsfonden Naturkraf

Danske Arkitektvirksomheder

Denmark > Employment Tier 3

SIRIUS advokater advises on both the employer and employee sides of employment law, and has acted in several high-profile commercial disputes, representing large and mid-size public and private businesses and organisations. Dually qualified in Denmark and Australia, Benjamin Lundström is an experienced litigator, arbitrator and mediator, handling the full gamut of employment issues. Lundström jointly leads the team with Pernille Backhausen who has specific knowledge of executive compensations and benefits.

Practice head(s):

Pernille Backhausen; Benjamin Lundström

Other key lawyers:

Peter Breum; Jacob Goldschmidt; Helle Nøhr Larsen

Key clients

HK Danmark

BLS Capital Group

The Ministry of Justice

Member of the executive management in Eik Bank


Yngre Læger

Red Barnet Ungdom (Save the Children Youth Department)

CO 10 – The Danish Confederation of Public Employees of 2010


Novavi Foundation


Roskilde Festival and Roskilde Festival Charity Society

Bikuben Foundation

Medpro Group

The Danish School for Authors

SAS Institute A/S

Per Moesgaard


Simple Revolution

PROSA labour union

Naturkraft Foundation



The Danish Institute of Arbitration

The Danish Mediation Institute

The Danish Court Administration

The Danish Arbitration Board

Various Ministries

IDA – The Danish Society of Engineers


Danske Bioanalytikere

Lærernes Centralorganisation


Danmarks Lærerforening

Dansk Magisterforening

Foreningen af Speciallæger





FOA A-Kasse



Frie Skolers Lærerforening


Maskinmestrenes Forening


Denmark > Dispute resolution Tier 4

At SIRIUS advokater, practice leadership of the dispute resolution team is split between Benjamin Lundström, Søren Stenderup Jensen and Kurt Helles Bardeleben, who handle mediation, litigation and arbitration proceedings, respectively. The group has significant experience in disputes relating to the construction sector and public law, acting for local governments as well as clients within the public utility sector.

Practice head(s):

Benjamin Lundström; Søren Stenderup Jensen; Kurt Helles Bardeleben

Key clients


Faxe kommune (municipality)

SK Forsyning A/S

Hessel Pharma

Telenor A/S

Instalaciones Inabensa SA

Sirius Company A/S

PROSA labour union


Danish Broadcasting Corporation

Entreprenørfirmaet Einar Kornerup A/S

CSK Stålindustri A/S, large steel contractor

DJØF labour union

Københavns kommune

Køge Kommune


Allerød Kommune




Fredensborg Kommune

WorldTicket A/S

Denmark > Commercial, corporate and M&A Tier 5

Olaf Carl Ehrenskjöld and Joachim Ørum Petersen co-head SIRIUS advokater’s commercial, corporate and M&A department. The team handles private equity and venture fund work and has bolstered its banking and M&A expertise through the recruitment of Flemming Pristed.

Practice head(s):

Olaf Carl Ehrenskjöld; Joachim Ørum Petersen

Other key lawyers:

Flemming Pristed; Benjamin Lundström


‘The phenomenal character of this office is extremely large in terms of degree of timeliness, execution on time, and never the feeling of being overcharged.’

‘Benjamin Lundström is beyond repute. He is extremely well suited to evaluate the legal aspects in a business light. He is quick, engaged and at the same time a very well-rounded person.’

‘Olaf Carl Ehrenskjöld is a very capable M&A specialist.’

Key clients

DSV Panalpina A/S (DSV Group)

M. Goldschmidt A/S

Medpro Clinic Sweden AB

Nordic Waterproofing A/S

Taasinge Elementer A/S

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

Bikuben Fonden

NIL Technology ApS

Ellegaard Göttingen Minipigs A/S

Protica Property Group ApS

Protica Invest A/S

Urban Core ApS

Jespers Torvekøkken ApS

Sirius Home A/S

Emply ApS

e-supplies a/s

H.W. Larsen A/S

Flash Light A/S


Roskilde Festival Charity Society

Creativ Company A/S

Calldorado ApS

Nordic Corporate Investment A/S


Spring Nordic ApS and CAT Fonden

Carve Consulting P/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

NCC Group

On the Beach Ltd

Bending Spoons Apps ApS and affiliates

UTF Holding ApS and subsidiaries (UTF Group)


Rosti A/S

Cems ApS and subsidiaries

Stay Properties ApS and subsidiaries

Foodoptimize ApS

Work highlights

  • Advised NIL Technology ApS regarding two rounds of investments leading to capital increases in NIL Technology ApS.

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.

Associations and Foundations - Charity Law Kim Pedersen
Associations and Foundations - Charity Law Aleksander Pilgaard
Mergers and Acquisitions Anders Kjær Dybdal
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 Kim Ørnstrup Rasmussen
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
Company Law and Commercial Law Anders Kjær Dybdahl
Danish and other Scandinavian languages