cordTech Hiring Rankings
UK's Most Popular Security Companies
The UK's most popular Security companies of Summer 2026 that are actively hiring engineers.
#
Company
Open jobs
Headcount
Overall popularity
Calculated based on total number of applications received compared with all companies in Summer ’26.
1
Atos
London, UK · ConsultancyTrusted partner for your Digital Journey.
48 jobs
5001+
Top 2%
2
Darktrace
Cambridge, UK · Computer and Network SecurityHelping over 9,000 organizations worldwide minimize cyber disruption.
18 jobs
1001 - 5000
Top 7%
3
Leonardo
London, UK · ManufacturingGlobal high-tech player in Aerospace, Defence and Security.
179 jobs
5001+
Top 7%
4
Nasstar
Dorset, UK · ConsultancyManaged service specialist.
8 jobs
501 - 1000
Top 9%
5
QinetiQ
Hampshire, UK · EngineeringCreate It. Test It. Use It.
34 jobs
5001+
Top 10%
6
TryHackMe
London, UK · EdTechHands-on cyber security training through real-world scenarios.
4 jobs
1001 - 5000
Top 11%
7
NCC Group
Manchester, UK · ConsultancyAt the heart of cyber innovation - helping to make the world safer and more secure
14 jobs
1001 - 5000
Top 11%
8
Roke
Romsey, UK · EngineeringWe're improving the world through innovation, bringing the physical & digital together to revolutionise industries.
6 jobs
501 - 1000
Top 18%
9
Advania Company
London, UK · ConsultancyThe tech company with people at heart.
19 jobs
1001 - 5000
Top 28%
10
Sophos
Oxfordshire, UK · Computer and Network SecurityCybersecurity as a service.
10 jobs
5001+
Top 34%
11
Mimecast
London, UK · Computer and Network SecurityAdvanced Email and Collaboration Security
13 jobs
1001 - 5000
Top 42%
12
Wavenet
Solihull, UK · TelecommsSimplifying technology, amplifying success.
11 jobs
1001 - 5000
Top 47%
13
Acora - Managed IT Services
West Sussex, UK · ConsultancyUniting IT and Security Operations.
6 jobs
501 - 1000
Top 67%
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