The people committed to the company

Marco W. Soijer
Founder & Executive Director

Marco (45) started working on creating Circle Networks July 2017. He previously set up and served as first CEO of a cybersecurity subsidiary for a multinational enterprise. Before that, Marco worked as head of engineering, project manager and flight test engineer in the Netherlands, Germany and Switzerland. He holds an MSc (1996) and a PhD (2003) in aerospace engineering from the Delft University of Technology and a Warwick MBA (2014). Marco's expertise is in project management, formal software development, strategy, general management and organisation, and cybersecurity management.

Patrick Sieradzon
Founder & Head of Development

Patrick (29) joined in on the preparations for Circle Networks Fall 2017. He is a former team leader for avionics components in flight simulation and software build manager with professional experience in Europe and Asia. Patrick holds a BEng in aerospace systems engineering from the University of the West of England and a BSc in aircraft and flight engineering from the Hochschule Osnabrück as a double degree (2013). Patrick’s expertise is in structured software development and agile software architecture. He has been dedicating his professional life to cybersecurity for several years now, including activities as a penetration tester and security analyst.

Petra Mitzel
Contracts and commercial advisor

Petra (38) joined Circle Networks in February 2018. She is a procurement and business law specialist and has served in leadership, procurement, programme management and supply chain roles in the aerospace industry for fifteen years before joining Circle Networks. She holds a BBA with specialisation in international marketing from the University of Cooperative Education Villingen-Schwenningen (2004) and an LLM in business law from the Westfälische Wilhelms-Universität Münster (2014). Petra's expertise is in marketing, supply chain management, contracts and in corporate finance.