more than a brand, a success story!

Started in 2006, Xpertize has been one of the very first recruitment agencies in Europe to apply an innovative recruitment methodology based on the extensive use of social networks combined with rewarded referrals. In 2012, new offices have been opened in Luxembourg and Morocco.


Since its creation, has developed long lasting clients relationships due to the ability of their passionate consultants to bring added value to candidates and clients. Our motto is short but clear: Simplicity, the best way to make it happen.


iStorm, created in 2009 in Brussels, is a Belgian recruitment agency focused exclusively on ICT profiles. Today, iStorm is recognized by major local and international firms as a valuable recruitment firm thanks to the professionalism of their team and their ethic.


Because Xpertize and iStorm share the same values, it appeared obvious that we had to work more and more closely. In 2014, both companies merged.


In Luxembourg, demand from our clients for IT profiles has increased in spectacular fashion and has reached such levels that we decided to create the iStorm brand in Luxembourg.


Our aim is to promote a highly specialized and dedicated ICT recruitment branch to better support our loyal clients and be ever closer to our IT candidates.


We want to share similar values than our Belgian friends: honesty, flexibility and quality and simplicity.


Through, we are willing to participate to a greater specialists’ network, to strength and gather the IT community in Luxembourg.


We are convinced that the crisis has changed people’s perception of happiness. Recruitment in IT field is no longer just about profitability, key performance indicators or return on investment. People look for employers with real values and long term vision.


At iStorm we have the ambition to bring these people together to create real happiness at work.


The results are there to see . Our company is different. The energy in the office is incredible – everybody works with a purpose and total dedication for their clients and candidates. Today, we have many respectable clients who trust us with their recruitment needs on a regular basis. The team has grown and we are convinced that is on target to become an established player in the market.


However, there are still a lot of companies and candidates out there to convince that an agency like iStorm can really help you to improve your business life.


At iStorm, we strongly believe that we can make a hell of a difference in shaping tomorrow’s recruitment industry.


I look forward to meeting you,



Sébastien Pourbaix

Managing Director

Our Team

photo-sebastienSébastien Pourbaix

Managing Partner

+352 20 30 10 31

Sebastien holds a Master Degree in international public law but worked most of his career in HR field. He moved from Paris to Brussels before to settle down in Luxembourg in 2008. He is co-founder of and manages both Xpertize & iStorm in Luxembourg.



photo-jonathan-2Jonathan Wolter

Recruitment consultant

+352 20 30 10 31

Jonathan is a talented recruitment specialist. He has an academic background in HR and has started his career as a trainee at He has quickly demonstrated strong abilities to manage a global recruitment process and has soon been promoted Recruitment Consultant at iStorm. He is our IT specialist for Luxembourg.




Christoph Maassen

Chief Executing Officer & co-founder

+32 2 612 80 10

Co-Founder of the company, Christoph accidentally fell into IT recruitment a long time ago despite a background as economist. He specializes in IT Project management and Business Analyst positions. Next to that, he manages an awesome team of recruitment consultants!



Laurence Billen

Senior Recruitment Consultant

+32 2 612 80 10

Laurence has a background in psychology and is expert in the Java and PHP market in Brussels and Wallonia. Her patience and her listening skills make her an extraordinary consultant: she holds most official awards from candidates and managers with regards to the quality of her work within the company!



Charlotte Ries

Recruitment Consultant

+32 2 612 80 10

The Duracell of the company! Always full of energy, Charlotte will fight for you real hard – she feels for her candidates and fights for her clients. She focuses on the Infrastructure market. Talking with Charlotte will get your day off to a great start.




caroCaroline Delpierre

Recruitment Consultant

+32 2 612 80 10

Caroline focuses on IT Analyst positions (Business analysts, Functional & Process analysts , Business Consultants). She is super dedicated and her ambition is to be recognized as THE person to call in her vertical market. Always in a good mood and willing to go the extra mile!