Our people

mr. Maurice Sijben

Maurice Sijben
Lawyer/partner
sijben@sijbenpartners.nl
045-5602200

I see my work as a game of chess, a challenge that requires creative solutions.

Expertise: employment law and mediation

Maurice Sijben has been working as a lawyer (in the Limburg district) for over 34 years. He is trained as an employment law specialist. Maurice Sijben is also a member of the Dutch Association of Mediation Lawyers (NVVMA).

In the field of employment law, he deals with, among other things, dismissal, labour disputes, reorganisations and takeovers, non-competition clauses, employers' liability and civil service law. He publishes publications and presentations, and is also associated with several companies, associations and foundations in South Limburg as an advisor, director and supervisory director.

In mediation, Maurice Sijben’s help is mainly sought in employment disputes, but also in family law issues and various other problems.

Mr. Maurice Sijben has registered the following specialisations with the Dutch Bar Association:
– Labour law
- Insolvency law
This registration requires you obtain ten training points annually in each registered legal area in accordance with the standards of the Dutch Bar Association.

mw. mr. Gabi Jongen

Gabi Jongen
Lawyer
jongen@sijbenpartners.nl
045-5602200

It’s not just fun and games here at the office.

Expertise: insolvency law, employment law, statutory debt restructuring and complex issues relating to personal and family law.

Gabi Jongen studied private law and commercial and corporate law. She specialises in insolvency law, employment law and statutory debt restructuring. She also focuses on personal and family law.

Gabi is a member of the Curators Association Sector Maastricht

Mr. Gabi Jongen has registered the following specialisations in the register of legal areas of the Dutch Bar Association:
- Personal and Family law
- Insolvency law
This registration requires you obtain ten training points annually in each registered legal area in accordance with the standards of the Dutch Bar Association.

mr. Milan Gaber

Milan Gaber
Lawyer
gaber@sijbenpartners.nl
045-5602200

Better safe than sorry.

Expertise: employment law, intellectual property and contract law

Milan Gaber specialises in employment law. He completed the Grotius specialisation course in employment law (post-academic course). Milan Gaber has experience as both a lawyer and a corporate legal expert. As a corporate lawyer in the music & entertainment industry, he has a further specialisation in intellectual property law and (international) contract law. The combination of lawyer/corporate legal expert means Milan Gaber has special expertise at the intersection of HRM-related issues and employment law.

Milan is a member of the Copyright Association.

Mr. Maurice Sijben has registered the following specialisations with the Dutch Bar Association:
– Labour law
– Intellectual property law
This registration requires you obtain ten training points annually in each registered legal area in accordance with the standards of the Dutch Bar Association.

mw. mr. Lieke Isenborghs

Lieke Isenborghs
Lawyer
isenborghs@sijbenpartners.nl
045-5602200

Can’t as a word doesn’t exist.

Expertise: procedural law, employment law, rental law and construction law.

Lieke graduated in 2003 and has since worked for two legal expenses insurers, as well as in the legal profession.

She has assisted private clients, SMEs and larger companies in a wide variety of legal issues and disputes.

In 2018, Lieke moved to Sijben & Partners Advocaten and is mainly involved in general (litigation) practice including employment law. Lieke also specialises in rental law and construction law. Lieke is also a member of the association for construction lawyers (VBR-A). 

Working closely with the client. That’s her motto. She looks for solutions that do legal justice to the situation, but can also empathise with the often emotional aspects that clients experience during legal conflicts.

Mw. mr. Lieke Isenborghs has registered the following specialisations in the register of legal areas of the Dutch Bar:
– General practice; civil
– Civil procedural law.

This registration requires you obtain ten training points annually in each registered legal area in accordance with the standards of the Dutch Bar Association.

mr. Stijn Hamers

Stijn Hamers
Lawyer
hamers@sijbenpartners.nl
045-5602200

At the heart of difficulty lies opportunity.

Expertise: employment law

Stijn Hamers completed a Master’s Degree in Law and Labour at the University of Maastricht, specialising in labour and health law.  Stijn has been working at Sijben & Partners Advocaten since 2019.

At Sijben & Partners Advocaten, Stijn focuses on various legal areas, including employment law. In addition, Stijn is particularly interested in sports law.

Stijn contributed to the Journal of Sport & Law, writing an article about the doctor’s duty of confidentiality in professional football.

Publications

Contribution by Stijn Hamers in the Journal for Sport & Law

mw. mr. Beau Ceryse van Hees

Beau Ceryse van Hees
Lawyer
vanhees@sijbenpartners.nl
045-5602200

The biggest risk is not taking a risk

Expertise: contract and liability law, real estate law and personal injury

Beau van Hees completed a Master’s Degree in Dutch Law at the University of Maastricht, specialising in criminal law and private law. She has been working in legal practice since 2017.

Beau moved to Sijben & Partners Advocaten on 1 February 2021 and is mainly concerned with contract law and real estate law, but will also focus on issues relating to personal injury and inheritance law.

Her determination and drive ensures Beau is able to provide optimal representation in the interests of her clients. She has an eye for every detail and every important item, which means she brings every legal dispute to a pragmatic conclusion.

mw. mr. Firi Boukhris

Firi Boukhris
Lawyer
boukhris@sijbenpartners.nl
045-5602200

Never let the fear of striking out keep you from playing the game.

Expertise: social security law, insolvency law, insurance law and real estate law.

Firi Boukhris completed a Master’s Degree in commercial and corporate law at Maastricht University. She is also trained as a special curator in youth cases. Firi has gained experience in the legal profession and at various government agencies. She has also been a volunteer at the Limburg Children’s and Youth Rights Centre for several years.

Firi came to work at Sijben & Partners Advocaten at the beginning of 2021. At Sijben & Partners Advocaten she focuses on social security law, insolvency law, real estate law and insurance law.

mw. mr. Mayke Ploemen

Mayke Ploemen
Lawyer
ploemen@sijbenpartners.nl
045-5602200

If you have the ball, your opponent doesn't

Expertise: Law of persons and family law, inheritance law, employment law, social security law

Mayke Ploemen studied private law and labor law. She has specialized in labor law and social security law since 2009. She also deals with complex issues in the field of personal and family law and inheritance law.

Mayke is a member of the association of lawyers specializing in the law of persons, family and inheritance law (vFAS).

Mr. Mayke Ploemen has registered the following specializations in the register of areas of law of the Dutch Bar Association:
- Law of persons and family law
- Inheritance law
- Labor law
- Social security law
This registration requires her to obtain ten training points in each registered area of law each calendar year according to the standards of the Dutch Bar Association.

mw. Megan Berghmans

Megan Berghmans
Legal Expert
berghmans@sijbenpartners.nl
045-5602200

Success begins with desire

Expertise: contract law (contract law)

Since beginning her legal education, Megan has practiced legal theory in various ways with great interest and enthusiasm. In 2022, Megan completed her bachelor's degree in Law at Maastricht University. Subsequently, she pursued the masters in Forensics, Criminology and Justice and Dutch Law, also at Maastricht University. Megan focuses on contract law within our firm.

mw. mr. Edith Sars

Edith Sars 
Legal Expert 
sars@sijbenpartners.nl
045-5602200

Looking at what is possible.

Edith completed the Master of Laws, profile Family and Juvenile Law, at Tilburg University. During her studies, Edith gained experience at other law firms. With a focus on solutions and a listening ear, she dedicates herself to her clients.

mw. mr. Zoë Heuts

Zoë Heuts 
Lawyer
heuts@sijbenpartners.nl
045-5602200

Through the “jungle of law,” I guide my client to reach the best feasible legal solution.

Expertise: contract law, real estate law and employment law.

In 2020, I completed my master's degree in Dutch Law at Maastricht University. As of January 27, 2022, I terminated as a lawyer. On February 1, 2025 I made the transition to Sijben & Partners Advocaten. I specialize in contract law, construction law, neighbor law, rental law and labor law.

In my work I show decisiveness, sharpness and a solution-oriented attitude. I am friendly, have both feet on the ground and treat people as I would like to be treated myself. My client's best interests always come first. Through the “jungle of law,” I guide my client to arrive at the best feasible legal solution.

José Grooten

José Grooten
Office manager
grooten@sijbenpartners.nl
045-5602200

You can only build bridges by working together.

José Grooten works at Sijben & Partners Advocaten in the position of office manager. Her tasks include processing the financial administration, secretarial support for the partnership, facility matters and support in the event of bankruptcies.

José has been working in the legal profession since 1986, was one of the founders of the current Sijben & Partners Advocaten, and over the years has gained the necessary experience within the law firm in the broadest sense of the word. The Dutch language is her hobby-horse.

Annie Miseré

Annie Miseré
Secretary
misere@sijbenpartners.nl
045-5602200

Quality is not an act, it is a habit.

Annie Miseré has been working as a legal secretary since August 1975. She has worked in various legal areas and has gained extensive experience and knowledge over the years. She currently works for the Employment Law section. The fact that she has been working in the legal profession for so many years, including 30 years at Sijben & Partners, shows that she does this work with great pleasure and dedication.

Celine Schoenmakers

Celine Schoenmakers
Management assistant
schoenmakers@sijbenpartners.nl
045-5602200

I don’t see problems, I see challenges.

Celine Schoenmakers started working as a secretary in 2013. Celine was promoted to the position of management assistant in 2020 and now heads the secretariat. Celine works in the employment law section. In addition to her secretarial duties, she is involved in PR activities, social media and runs our Sijben & Partners Academy.

Celine has completed the executive secretary/management assistant training. 

Edith Voragen

Edith Voragen
Secretary
voragen@sijbenpartners.nl
045-5602200

Getting together is just the start,

staying together is progress,

collaborating is success.

Edith Voragen has been working as a legal secretary at Sijben & Partners Advocaten since 2016. Her tasks include secretarial support in the sectors of corporate law, bankruptcy law, personal and family law and debt collection through term monitoring, roll journal, processing incoming and outgoing correspondence and e-mails, (telephone) client contact, processing dictations, agenda management and declaring/invoicing. Before joining Sijben & Partners Advocaten, Edith gained more than 8 years of experience as a legal secretary at three law firms in the Parkstad region and Nieuwegein.

Yvonne Claessen

Yvonne Claessen
Secretary
claessen@sijbenpartners.nl
045-5602200

Love what you do and do what you love!  

Yvonne Claessen joined Sijben & Partners at the beginning of 2020. She works in the Employment Law section. She previously worked at three law firms in the Maastricht region for almost twenty years. Enthusiasm, perseverance, collegiality and client focus are of paramount importance to her.

Vivian Ploum

Vivian Ploum
Secretary
ploum@sijbenpartners.nl
045-5602200

Dream it, Believe it, Achieve it

Vivian has been working in the employment law section at Sijben & Partners since the beginning of 2021. She also supports the curators in bankruptcies. Vivian has over 20 years of experience in the legal profession; in short, she is an all-round legal secretary.

Kyra Hoeveler

Kyra Hoeveler
Secretary
hoeveler@sijbenpartners.nl
045-5602200

The best way of learning anything is by doing it.

Kyra joined Sijben & Partners Advocaten as a receptionist in November 2021. Kyra was promoted to the position of legal secretary in December 2022.

Kyra made the switch from the hospitality industry to the legal world to broaden her horizons because the legal world always held a certain attraction for her.

Her passion is and remains “working with and among people”.

Liliana Clermont

Liliana Clermont
Receptionist
clermont@sijbenpartners.nl
045-5602200

Dream as if you’ll live forever, live as if you’ll die tomorrow.

Liliana Clermont joined Sijben & Partners Advocaten as a receptionist in December 2022. When Liliana goes for something, she goes for it 100%. Whether this is on a personal or business level, it makes no difference to her.

If you contact our office, Liliana will be your first enthusiastic point of contact. In addition to her reception work, Liliana will support our secretarial team.

Kelsey van Prehn

Kesley van Prehn 
Junior-Secretary
vanprehn@sijbenpartners.nl
045-5602200

Believe you can and you're halfway there

Kelsey van Prehn graduated from her Office Assistant program in 2022. Kelsey has been working in another sector after graduating, but will be supporting us as a junior secretary from now on.

Sanne Rothkrantz

Sanne Rothkrantz 
Secretary
rothkrantz@sijbenpartners.nl
045-5602200

Every beginning is an opportunity to grow  

Sanne Rothkrantz graduated from her management assistant/director secretary program in 2021. Shortly thereafter, she completed an internship with our office.

Sanne worked in another sector after graduation and is now back at our office. As of February 17, 2025, Sanne will start as a secretary.