After completing his Master's degree in Tax Law at the Leiden University, Gijs started his career in 2019 at one of the Big Four firms with a focus on transfer pricing.

In 2022, Gijs joined Atlas where he is part of the transfer pricing team. His work includes all aspects of transfer pricing, including restructurings, dispute resolution, design, documentation, implementation and performing valuations for tax purposes. During his studies, Gijs was a working student at Atlas.