Sijbrand Tieleman

Proba

BIOGRAPHY

Sijbrand Tieleman is the CEO and co-founder of Proba, a climate tech company focused on reducing fertilizer-related emissions in global agri-food supply chains. Proba helps companies quantify and certify Scope 3 emission reductions, enabling farmers, fertilizer companies, and food businesses to finance and scale lower-emission practices.

Sijbrand's mission through Proba is to make fertilizer-related decarbonization measurable, credible, and commercially viable across the global food system. His work connects climate accountability with practical tools that drive adoption at scale.