Gerrit Hiemstra, MScCo-founder and Chief Executive Officer
Gerrit is a meteorologist with in-depth experience in the meteorological field. He graduated in 1986 at Wageningen University as Agricultural Engineer, with a specialisation in Agricultural Meteorology, followed by a 9-year period as operational weather forecaster in a commercial weather company.
After a brief period as head of the operational weather service at Schiphol Airport he founded the successful commercial weather company WeerOnline, which was sold in 2009.
Gerrit is also the well-known weather presenter of NOS, the national news organisation of the Netherlands, since 1998.
At Weather Impact Gerrit is responsible for project acquisition and contract management.
Arnold Lobbrecht, PhDCo-founder and Chief Technology Officer
Arnold graduated in 1986 from Delft University of Technology as Civil Engineer. He gained experience in hydrology, water management and informatics during a 12-years period at a multinational consultancy firm.
After 4 years of research he obtained in 1997 his PhD in operational water management. After that he became part-time professor of hydroinformatics at UNESCO-IHE in Delft, guiding a group of PhD researchers. In 2000 he established HydroLogic, a hydroinformatics company, working on water & ICT projects.
His experience is in decision support systems with focus on flood forecasting, water availability and droughts.
Stefan Ligtenberg, PhDProject leader and consultant
Dr. Stefan Ligtenberg works at Weather Impact as project leader and consultant.
Stefan graduated in 2009 at Wageningen University in Meteorology and Air Quality. He finished his PhD in 2014 on the field of polar meteorology at Utrecht University. Subsequently he started two postdoctoral positions at Utrecht University, for the last he received an NWO VENI scholarship.
At Weather Impact, Stefan works as consultant and project leader. He has experience with weather forecasting in Southeast Asia and East Africa. He is an expert in translating meteorological weather parameters in messages that fit the local context of a farmer.
Bob Ammerlaan, MScConsultant
Bob Ammerlaan MSc. works at Weather Impact as consultant.
Bob has a background in Physics and Meteorology and graduated in 2018 at Utrecht University in Meteorology, Physical Oceanography and Climate.
At Weather Impact, Bob works as consultant meteorology and climate change. He is responsible for the operational services at Weather Impact. He has experience with weather forecasting in Southeast Asia and East Africa and is an expert in using agricultural and meteorological information to give the best advice to local farmers.
Edith Tea, MScBusiness Developer
Edith has studied Hydrology at Vrije Universiteit Amsterdam, for which she received a Rotary Grant Scholarship. She also has a background in Physics from Gettysburg College, United States. She has gained experience with proposal writing, academic research and has great skills in data analysis. At Weather Impact, Edith is responsible for project acquisition regarding weather services. She also speaks several languages – French, Spanish and English -, a great benefit for our international work.
Tamara LancelManagement Assistant
Tamara Lancel works at Weather Impact as Management Assistant.
She graduated in Hotel & Hospitalitymanagement in 2007 and has a background in the hospitality industry, organizing congresses and events. In her last job she worked as a training coordinator and arranged technical IT trainings for the Benelux and Africa region. Tamara is very strong in planning, coordinating and organizing, and has experience in broad administrative and logistic work. At Weather Impact she supports the team in marketing, HR, administration, acquisition and other organizational tasks, to share our expertise about smart weather solutions.
Ilse Nijensteen is a second year master student in Geoscience & Remote Sensing at Delft University of Technology. This master is about modelling, data analysis and data processing in the context of geosciences. She already completed bachelors in Applied Mathematics and Physics. As a part of her master, she is now a trainee at Weather Impact, contributing to the development of the ‘Waarschuwing voor WaterOverlast’ (W2O) project. This innovative service will use a combination of satellite data, weather predictions, hydrological models and algorithms to make better flooding predictions.