David Calder

Adarma Ltd. provides independent security services. It offers monitoring and analytics, vulnerability management, and threat management. The company was founded by David Calder and Nathan Dornbrook in 2009 and is headquartered in Edinburgh, the United Kingdom.

Founded in 2019, Project Excalibur Midco 2 Ltd. is an investment holding British company. Part of Gresham House Plc, the company is based in London, UK.

Part of Gresham House Plc, Project Excalibur Bidco Ltd. is a British company that provides strategic management services. The company is based in London, UK and was founded in 2019.

Part of Gresham House Plc, Project Excalibur Topco Ltd. is a holding British company that provides cyber-security services through its subsidiaries. The company is based in London, UK and was founded in 2019.

Founded in 2019, Project Excalibur Midco 1 Ltd. is an investment holding British company. Part of Gresham House Plc, the company is based in London, UK.

ECS Europe Ltd. engages in the provision of software services. It offers service delivery, professional services, managed, cloud, and flexible resourcing. The firm offers its services in the following areas; networks, information technology consultancy, data center, information technology security, end user computing, and program delivery. The company was founded in 2008 and is headquartered in Glasgow, the United Kingdom.