Sebastian is a plant taxonomist working on a variety of taxonomic groups and regions, currently speciose genera in New Guinea. He has also studied the evolution, ecology, systematics and taxonomy of parasitic plants.

Sebastian has a passionate interest in the flora and ecosystems of Namibia, in particular the Namib Desert. Since 2023, he has been working with Gobabeb to write a Flora of the Central Namib Desert. He has also re-curated, digitised and officialised the Gobabeb Herbarium (GBB), which houses nearly 2,600 specimens, largely Namib Desert plants.

Additionally, Sebastian has worked together with Gobabeb on the conservation of the stone plant, Lithops gracilidelineata, conducting population surveys across its native range, completing an IUCN Red List Assessment for the plant, and describing a new subspecies of L. gracilidelineata from the Kunene region.

His publications may be found on Google Scholar here. 

@GobabebRSH