Callens, Pirenne, Theunissen & Co

Smart decisions. Lasting value.

Our Services

Callens, Pirenne, Theunissen & C° offers a wide range of support services, specifically designed to help companies and organizations achieve their goals. Transparency, integrity and personal contact are key to all our experts.



Accounting and Reporting

IT Services


Risk Management

Corporate Finance

About Callens, Pirenne & Theunissen

Callens, Pirenne, Theunissen & C°, as an audit and accountancy firm since 1936, holds a prominent place in the top 10 Belgian firms and is renowned for its strong sector-oriented approach.

The firm is highly valued by its clients for its personal approach, integrity and independence. In 2008 Callens, Pirenne, Theunissen & C° joined Crowe Global, one of the 10 largest networks of audit and accounting firms worldwide.

Expertise in different sectors

Callens, Pirenne, Theunissen & C° offers broad technical expertise and deep local market knowledge in audit, tax, accounting, IT services, risk management and corporate finance, consistent quality and impeccable service to various large and small, private and public, local and global industry sectors.

International Clients


Public sector


Privately Owned Business


Junior Auditor – Kortrijk/Region East Flanders

Junior Auditor – Kortrijk/Region East Flanders

Als Externe Auditor maak je deel uit van een dynamisch team van jonge auditors die de controle uitoefenen bij diverse ondernemingen en instellingen. Onder supervisie evalueer je bij de cliënten ter plaatse de administratieve en boekhoudkundige organisatie en...

read more
Junior Auditor – Antwerp

Junior Auditor – Antwerp

As External Auditor you will be part of a dynamic team of young auditors who audit a variety of companies and organisations. Under supervision of our managers and partners, you will evaluate the administrative and accounting organisation of our clients and you will...

read more