PCAOB Registered

Languages Spoken: Dutch English French

aternio is a successful and truly independent firm in the Belgian triangle Ghent-Antwerp-Brussels. Our people have outstanding expertise in audit, accountancy, tax and advisory services across a range of markets and sectors. aternio serves profit and non-profit organisations as well as individuals. Our heart beats for owner-managed businesses, entrepreneurs and ambitious, mission-driven idealists. Being a member of PrimeGlobal, we are well placed to welcome and to support our clients' international ambitions. We strive to build strong and long-lasting relationships with our clients. That is why our accountants, tax advisors and lawyers work as one. Knowledge that delivers for you.

This firm is an independent member of PrimeGlobal, offering a variety of services in a range of industries to their own clients, and, through their membership in the association, to clients of peer firms throughout the world. To find out more about how aternio can benefit you and your clients' businesses, contact us.

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A Message from Managing Partner, Johan Lemmens:

At aternio, we are passionate about our clients. That is what we say and do every day. Excellence, empathy and efficiency are our qualities. Client satisfaction is our motivation. aternio delivers high-quality accounting, audit, taxation, legal and advisory services to local and international clients. We have a great deal of international experience and it is fantastic that we can share this with other PrimeGlobal members on a regular basis. We listen, we talk and we do. Get in touch and explore.

Contact Us

Languages Spoken: Dutch, English and French


Zwaarveld 41, Hamme, Vlaanderen 9220


+32 (0) 52 47 82 41

View firm's social media links

Firm Locations

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Primary Location

Zwaarveld 41, Hamme, Vlaanderen 9220, Belgium

Johan Lemmens, Managing Partner
+32 (0) 52 47 82 41

Antwerpen, Vlaanderen, Belgium

Mechelsesteenweg 271, Antwerpen, Vlaanderen 2018, Belgium

Johan Lemmens, Managing Partner
+32 (0) 3454 3000

Watermaal-Bosvoorde, Brussels, Belgium

Terhulpensesteenweg 185, Watermaal-Bosvoorde, Brussels 1170, Belgium

Johan Lemmens, Managing Partner
+32 (0) 2 709 20 20

People at aternio

Johan Lemmens Photo

Johan Lemmens

Managing Partner - CKO

Guy Baecke Photo

Guy Baecke

Director Quality Control

Yentl Peelman Photo

Yentl Peelman

Office Manager Finance

Melissa Hanssen Photo

Melissa Hanssen

Office manager (legal)

Thought Leadership by aternio