Our leaders

Gabriel Haythornthwaite is the company director and founder. He has over 20 years experience in requirements analysis, system design, implementation, project management and commissioning of complex systems. Gabriel has led numerous teams that have developed application security solutions. He is an engineer and design specialist with a strong track record in successfully balancing security, complexity, usability and cost efficiency. He has a strong track record of engaging with the customer, identifying their real needs and ensuring that these needs are met. Gabriel's leadership and technical skills are instrumental to the success of Castelain's customer's projects.

Stevan Vujovic is the sales and marketing manager. He has extensive experience in managing complex environments encompassing sales, services and marketing functions. Stevan has been involved in the development of technology for over 20 years and has a strong grasp of the technical and business issues facing customers developing new systems. Stevan's strengths are the ability to understand and articulate what the customer really wants and to think creatively to solve complex or seemingly impossible problems.