Making people's lives better

An overview of all the CSR-related things we do. They show how a concerted focus on CSR benefit both the company and the communities in which we operate. We believe deeply in this potential of shared value for all our stakeholders, whether they are employees, suppliers, clients, governments, shareholders, partners, local communities, or society as a whole.

US Sailing membership

We're a member of US Sailing, the National Sailing Organisation for the US.

VFB membership

We're a member of the VFB, the federation of investors in Flanders.

Vinyl plus membership

We're a member of Vinyl plus, the Voluntary Commitment of the European PVC industry.

ZDHC membership

We're a member of ZDHC, Zero Discharge of Hazardous Chemicals.

ADF membership

We're a member of ADF, the Association des Arboristes de France. The manager of our SIP-Protection brand is co-founder, treasurer and partner.

IGS membership

Through Manifattura Fontana, our brand that produces geotextiles, we're member of IGS, the International Geosynthetics Society.


Mullion is a member of the British Safety Industry Federation (BSIF).

Art at heart

Sioen actively contributes to art and culture and stimulates and supports artists all over the world. One of the more reknown projects was The Gates of the world famous artist Christo in New York.

SA8000 equivalent

Sioen holds several similar/ comparable credentials to the SA 8000 that show our commitment to all our employees. The STeP certificate covers the fields the SA8000 sets out.


Sioen partners up in the Coastbusters project to develop nature-based solutions for coastal stabilisation.

Valipac membership

We're a member of Valipac


Sioen en TensiNet have a successful partnership

Team Humber membership

We're member of Team Humber Marine Alliance


We're a partner of IMS E.V


We partnered up with TreesAreGood

VOKA membership

Sioen is a member of VOKA, the Flemish network of enterprises

LSAA membership

Sioen is a member of the Lightweight Structures Association of Australia.

Training of a fire investigation dog

Sioen supports a Belgian project in which a dog is trained to help with fire detection. Read more.