Executive Summary: Omdia Universe: Operational Technology Cybersecurity Services, 2025–26

Hollie Hennessy

OT/IoT Cybersecurity Lead

Hollie provides insight into the fascinating and fast-moving domain of OT and IoT cybersecurity, covering both cybersecurity and product security across automotive, medical, embedded, and industrial.

Hollie has a range of experience in research. She began her career in the legal sector, writing and researching for expert witness reports on the labor market. She then moved into product testing, with a consumer protection focus. In this role, she was responsible for managing comparative tests of various technology and IoT products, as well as regular testing and investigative work into the security of these devices.

She has published articles in Which?, produced by the UK’s largest consumer organization and one of the country’s largest subscription magazines, Computing, and regularly provides expertise for news announcements and reports. She is also a regular speaker at industry security events, as well as specialised events in the OT and IoT cybersecurity space. She has a particular interest in regulation and standards, supporting numerous research projects on the topic, ranging from consumer device testing and labelling, 5G security standards, OT security regulation, and automotive cybersecurity regulation.