Simple, Straight and Smart


Altesia is an independent partnership of hands-on & pragmatic financial professionals providing companies with a wide range of services in the fields of:

  • Interim Finance Management
  • CFO Services
  • Financial and Strategic Advisory
  • Project and change management
  • Set-up and reengineering of Finance, HR, IT and PMO Departments

Whether you are looking for a part-time or full time support, we deliver effective answers to current business needs through our pragmatic, structured and collaborative methodology.

We commit to provide at each engagement all our efforts, skills, knowledge and enthusiasm to deliver quality results on time.

Our expertise and experience are especially helpful to growing and changing organizations looking for flexible and customized solutions.


CFO services

We offer part-time to full time CFO Services in the following fields of expertise, from start-ups/SME’s up to large multinational groups:

  • Head of Finance
  • Business/Financial Analysis
  • Controlling
  • Reporting
  • Corporate Finance
  • Consolidation
  • Treasury Management

Interim Finance Management

We perform short to long term assignments as Interim Finance Manager (CFO, Head of controlling, etc.). The expertise and experience of our Partners are especially helpful to growing and changing organizations which are looking for flexible solutions.

Project (Portfolio) Management

Altesia provides the skills and expertise to run any Project & Change management assignement or Project Portfolio (PMO) in the fields of Finance, IT, HR, OPEX, …

Our 3S methodology takes the best of various proven techniques (i.e. Agile, Prince 2, …) to tailor a pragmatic, structured and collaborative methodology which provides our customers with the best answers to their current business needs.

Financial and Strategic Advisory

We provide state-of-the art financial and strategic advisory in the fields of:

  • Financial due diligence
  • KPIs development
  • Strategic Planning
  • Business Process Management (BPM)
  • IT alignment
  • Department set-up & re-engineering
  • Business Planning

Our 3S Methodology

We apply a Simple, Straight and Smart methodology to move any assignment forward.



Cédric Van Themsche

Hands on Partner
Cedric is the Co-Founder of Altesia and brings extensive experience in controlling, corporate finance, business development, operational excellence, IT and project management across multiple industries. He currently fulfills the role of CFO at a large hospital in Belgium.


Mathieu Delveaux

Hands on Partner
Mathieu is a pragmatic finance manager with 13 years of experience in audit, controlling, business development and financing. His main focus is on start-up, spin-off and SME’s. He currently works as CFO for a biotech company.


Gael Claude

Hands on Partner
Gael is an experienced finance professional with 13 years of experience with various positions as financial auditor, financial controller and CFO. He currently works as part-time CFO and HR Manager for two SME’s.


Thomas Vanholme

Hands on Financial Manager
Experienced Consultant with focus on project management and financial expertise across multiple industries.


Sébastien Collart

Hands on Financial Manager
Sebastien is a passionate finance professional with over a decade of experience in audit, M&A, controlling and financing for small and medium-sized enterprises. He currently serves as part-time CFO to two SMEs.


Our Values


“People often associate complexity with deeper meaning, when often after precious time has been lost, it is realized that simplicity is the key to everything.” ― Gary Hopkins


“The shortest distance between two points is a straight line.” Archimedes


“A smart man makes a mistake, learns from it, and never makes that mistake again. But a wise man finds a smart man and learns from him how to avoid the mistake altogether.” Roy H. Williams



CFO services


Interim CFO, Project & change management.


CFO services


CFO service, Corporate Finance


Financial due diligence

MusicMatic/ Storever

CFO services

Cisbio Bioassays

Interim CFO

Synoline Pharma

Financial Advisory & CFO services


IBA worked several times with the Altesia team on financial assignments (CFO services, Interim management). The team at Altesia are pragmatic and solution-driven which is very valuable for changing organizations. We were very satisfied working with their team.

J-M Bothy, CFO IBA

L’équipe ALTESIA assiste Pharmasimple dans sa croissance notamment en l’aidant à structurer son département financier et en mettant en place des indicateurs financiers utiles au suivi de la performance opérationnelle de la société (via une mission de part-time CFO) ainsi qu’en accompagnant la société dans ses démarches de financement de sa croissance.

Michael Willems, CEO Pharmasimple

Cisbio Bioassays worked with Altesia for a mission of interim CFO from June 2013 til August 2014 conduct by one of its Partner. During this term he not only re-structured the financial reporting of the company and was instrumental behind CBBs operational and strategic business plan but he also organized all financial aspects of CBBs management buy out which was closed in November 2013. In 2014, he drove the "autonomy project" which was the organization of the transfer of financial and other administrative services to CBBs HQ.

Berthold Baldus, President & CEO Cisbio Bioassays

Altesia est une plateforme de compétences financières et méthodologiques unique en son genre. Les deux intervenants de l’équipe Altesia incarnent ensemble dans la complémentarité, et individuellement dans leur spécificité respective, les qualités recherchées auprès de consultants en « change management » ou management de transition. Ils sont pointus dans leurs outils, très à l’écoute de leurs interlocuteurs, soucieux de leur apporter le support et l’encadrement nécessaires, dans le but que les acteurs puissent s’émanciper à un certain moment. Leur sensibilité à leurs clients est remarquable, en particulier dans le secteur hospitalier où il faut faire preuve de « high touch »

Jean-Marie LIMPENS, Administrateur délégué CHR-Mons Hainaut


If you have a project you would like to discuss, get in touch with us.

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