International Clients

In their day-to-day operations and activities, multinationals and transnational companies with global operations are faced with a mixture of financial, legal, IT and operational challenges, both in their existing markets and in the markets they seek to develop.

As a successful multinational or transnational company you want to be able to rely on an Assurance and Advisory Firm, that is part of a worldwide global network of Member Firms, and whose professionals share your language, culture, concerns, vision and business objectives. In one word, you want to receive the right advice at the right time from the right professional.

Callens, Pirenne, Theunissen & C° is member of the Crowe Global network, which ranks among the 10 largest Audit and Accounting networks worldwide and is in a position to support international clients with a range of service offerings fully aligned to the needs of international businesses.

With more than 750 offices in more than 130 countries and more than 33.000 employees, our network has a real global presence.

What makes our Mid-Tier Network different?

First of all, our network firms support a high level of personal partner involvement, where the engagement partner will be actively involved in delivering our services to you as a client.

Secondly, we can build on our strong market position in the key economic centers (such as China, the United States, Asia Pacific, the Middle East and Central America) as well as our neighboring countries (Germany, France, UK, the Netherlands).

And thirdly we will swiftly and proactively respond to your questions and demands through our personal involvement and pragmatic approach.

Crowe Global

As a member of the Crowe Global network we offer you a range of services with the support of our network members across borders as well as a vast experience with different industries including manufacturing, & distribution, healthcare, life sciences, public sector, hotel & leisure, food & commodities, insurance, financial services, consumer products, real estate and construction, retail, technology and communications and fintech.

Crowe Callens, Pirenne, Theunissen & C° is also involved with a number of industry expertise groups within the Crowe network. With the help of our subject-matter-experts we can make the difference in delivering external audit services and advisory services to your company.

CHAN Healthcare

As member of the Crowe Global Healthcare group we have combined resources to create one of the largest and most experienced providers of services to the healthcare industry, including internal audit, cybersecurity, risk management, regulatory compliance and financial advisory services such as due diligence and mergers and acquisition support in the healthcare industry worldwide.

Together with our Firm’s position in the Crowe Global’s Healthcare Specialty Group, this combination strengthens the ability of Crowe | Callens, Pirenne, Theunissen & C° to help healthcare industry service providers in Belgium (hospitals, national health insurance providers, local public welfare institutions, retirement homes, elder facility providers,…) to mitigate emerging risk and financial issues.

All services offered are supported by Crowe Healthcare and the Crowe Global network.

Reach your goal with our services



Accounting and Reporting

IT Services


Risk Management

Corporate Finance

Your expert

Lieven Van Brussel
Lieven Van Brussel