Jan Callewaert (1956 – 1 February 2022) was a Belgian businessman.
He obtained a Master in commercial sciences and a bachelor in philosophy at the Katholieke Universiteit Leuven.
He later became a system engineer, and then product manager at Bull until 1984 when he joined Ericsson telecommunication.
In 1986, he founded Option International, and started the production of modems for laptops.
This business-related Belgian biographical article is a stub.