He has previously interned as a research assistant in Ethiopia. During his time in Ethiopia, he participated in a high-level meeting on resource management and wrote a concept note on the 2016-17 Horn of Africa Drought. Thus, exhibiting an understanding of the flow of high-level meetings, with experience in creating briefing notes for those involved, and drafting detailed minutes. Furthermore, Guilherme has previous experience in developing and maintaining newsletters, where he was responsible for writing articles, editing and distributing the newsletter.

During his studies he undertook several academic projects, namely, a management consultancy project in association with the City Hall of Rotterdam and a sanctions project on Chinese media censorship in association with the Dutch Ministry of Foreign Affairs.

Guilherme joined Time&Place Group in October 2023. Guilherme's contributions so far have come through an active role in policy monitoring and analysis of EU regulations, conceptualising position papers, drafting concise presentation for high-level meetings and stakeholder mapping. These contributions have come mainly in the field of e-mobility, where Guilherme has been able to expand his involvement on several areas such as charging infrastructure, standardisation, types of charging and smart grids; not least within the scope of CharIN e.V.

Guilherme speaks Portuguese, English and Spanish, while also holding a basic understanding of French.