Castellum Security Collective competitors and alternatives
As of Nov 14, 2026, Alion lists 10 companies most like Castellum Security Collective: Prosegur, Securitas Colombia, Secom, WorldSecurity, Avarn Security, Securitas België, Prosegur, G4S Secure Solutions, BM Security and Panorama Alarm Systems and Security Services.
- Castellum Security Collective itself has 31 open roles on Alion.
- Of them, Prosegur is hiring the most, with 7 open roles.
Castellum Security Collective and its competitors compared
Open roles are the postings Alion lists today; their change is shown only for career sites that state posting dates. Funding is the venture money on record. A dash means Alion holds no figure.
| Company | Open roles | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|
Castellum Security Collective
This company
|
31 | – | Rijsenhout, Netherlands | Windows, Scala, SQL | Netherlands |
Prosegur
In common: Security Services, Access Control & Alarm Systems, Video Surveillance · SQL, Windows |
7 | – | Madrid, Spain | SQL, Linux, Windows | Colombia |
Securitas Colombia
In common: Security Services, Access Control & Alarm Systems, Video Surveillance |
3 | – | Bogotá, Colombia | – | Colombia |
| Secom In common: Security Services, Access Control & Alarm Systems, Video Surveillance | – | – | Taipei, Taiwan | Xamarin | – |
WorldSecurity
In common: Security Services, Access Control & Alarm Systems, Video Surveillance |
2 | – | Athens, Greece | – | Greece |
Avarn Security
In common: Security Services, Access Control & Alarm Systems, Video Surveillance |
2 | – | Vantaa, Finland | – | Finland |
Securitas België
In common: Security Services, Video Surveillance, Access Control & Alarm Systems |
– | – | Machelen, Belgium | Incident Management | – |
Prosegur
In common: Security Services, Access Control & Alarm Systems, Video Surveillance |
– | 5000+ | Renca, Chile | Power BI, Microsoft Excel | – |
| G4S Secure Solutions In common: Security Services, Access Control & Alarm Systems, Video Surveillance | 1 | – | Salzburg, Austria | – | Austria |
BM Security
In common: Video Surveillance, Access Control & Alarm Systems, Security Services · Windows |
2 | – | Nairobi, Kenya | CAPA, Wi-Fi, TCP/IP | Kenya |
Panorama Alarm Systems and Security Services
In common: Access Control & Alarm Systems, Video Surveillance, Security Services · Windows |
– | 1001-5000 | Kitwe, Zambia | Active Directory, Wi-Fi, VPN | – |
How the list is made
The list comes from Alion's similar-companies engine, the same one AI agents query through the Alion MCP server. A company ranks higher when it shares more of Castellum Security Collective's industry segments and is less spread over others, when its job postings name the same technologies, when it is headquartered in the same country and when its size is close. The list is rebuilt every week.
How to cite this page
These figures are published under a free licence. You may reuse them, including commercially, as long as you credit Alion and link back to this page.
Alion, "Castellum Security Collective competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 14, 2026. https://alion.io/company/castellumsecurity/competitors