Apples and girl

About BigSis

BigSis is a British R&D-based company that develops sustainable insect control solutions for agricultural, public health and other pests. We give growers urgently-needed sustainable alternatives to chemical insecticides, boosting biodiversity and improving control of challenging pests.

BigSis has reinvented the sterile insect technique (SIT) by automating the individualised production of sterile male insects. This requires integrating biology, engineering and artificial intelligence capabilities to deliver a highly automated production process.

BigSis operational systems will be implemented in micro-production units located close to grower customers to deliver an efficient and cost-effective service on-farm. Our season-long control service will be marketed primarily through established distributors.

Starting with insects where growers are desperate for new solutions, BigSis will progressively address dozens of commercially valuable pest targets. Our leading solution, which is to control spotted wing drosophila (SWD), is already in field trials. The BigSis codling moth solution is proven in the lab and will soon be trialled in the field.

Our team

David Jones

Dr David Jones


Dr David Jones brings extensive agribusiness knowledge and contacts through his career experience including on the Executive Committee of Syngenta and as Chairman of Arysta, Plant Impact and Enko.


Glen Slade

Founder and CEO

Glen Slade spent five years as Global VP and Brazil GM at Oxitec, where he commercialised genetically modified insects for use in SIT. He previously held senior roles in agribusiness (Syngenta, Arysta) and founded two IT start-ups. He has a Cambridge First in Computer Science and an MBA with Distinction from Insead.


Dr Rafael Homem

Head of R&D

Dr Rafael Homem is an accomplished molecular biologist with expertise in insect biology, insect rearing and fitness studies. He has a PhD in Cell and Molecular Biology from the University of Edinburgh and 5 years’ postdoctoral research experience as a Molecular Entomologist/Gene-editing Specialist at Rothamsted Research Institute.

David Brewer

David Brewer

Head of Engineering

David Brewer is a systems engineer with a background in automated storage and retrieval systems, plant automation and systems integration. His experience spans many industry verticals including Automotive, Defence, Transportation and Telecommunications. He has worked for blue-chip companies in the UK, Europe and North America.


Dr Zeus Mateos

Senior Entomologist

Dr Zeus Mateos is an entomologist who has focused on both beneficial and pest crop arthropods, particularly for Integrated Pest Management to enhance sustainable agriculture. He conducted his PhD in pollination and pest regulation services in orchards at the University of Worcester.

Dan Gilbert

Daniel Gilbert


Daniel Gilbert is an entomologist who has spent his career rearing and field testing beneficial arthropods in soft fruit crops, particularly predatory mites and lacewings. He has an MSc from Harper Adams University in Entomology focussing largely on crop protection and agro-entomology.

Career opportunities

If you would like to be considered for an advertised or other future role, please email your CV as a pdf file with a short cover message stating why you think you are unique as a candidate and your salary expectation.