{"company":{"id":4417376,"name":"Castellum Security Collective","domain":"castellumsecurity.nl","url":"https://alion.io/company/castellumsecurity"},"section":"offices","answer":"Castellum Security Collective has 11 sites in 1 country; 11 sites have open roles now. The busiest is Oldenzaal. The head office is in Rijsenhout.","figures":[{"label":"Sites","value":"11"},{"label":"Countries","value":"1"},{"label":"Hiring offices","value":"11"},{"label":"Open roles","value":"25"}],"blocks":[{"key":"sites","title":"Every site","source":"office addresses in postings and company registers","rows":11}],"sites":[{"site":"Rijsenhout","country":"Netherlands","type":"Headquarters","open_roles":"3","roles_90_days":"2","hires_most_for":"Solutions, Industrial Engineering","engineering_share":"0%","seen_since":"Feb 2026"},{"site":"Oldenzaal","country":"Netherlands","type":"Plant / site","open_roles":"4","roles_90_days":"2","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Jun 2026"},{"site":"Nieuw-Vennep","country":"Netherlands","type":"Support & operations","open_roles":"4","roles_90_days":"1","hires_most_for":"Operations, Field & Service","engineering_share":"0%","seen_since":"Sep 2024"},{"site":"Nuenen","country":"Netherlands","type":"Plant / site","open_roles":"3","roles_90_days":"1","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Nov 2025"},{"site":"Bodegraven","country":"Netherlands","type":"Not classified","open_roles":"2","roles_90_days":"2","hires_most_for":"Support, Field & Service","engineering_share":"0%","seen_since":"Oct 2026"},{"site":"Alkmaar","country":"Netherlands","type":"Not classified","open_roles":"2","roles_90_days":"1","hires_most_for":"Operations, Field & Service","engineering_share":"0%","seen_since":"Feb 2026"},{"site":"Hoogeveen","country":"Netherlands","type":"Not classified","open_roles":"2","roles_90_days":"0","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Jul 2026"},{"site":"Veenendaal","country":"Netherlands","type":"Not classified","open_roles":"2","roles_90_days":"0","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Mar 2025"},{"site":"Dordrecht","country":"Netherlands","type":"Not classified","open_roles":"1","roles_90_days":"1","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Sep 2026"},{"site":"Aalten","country":"Netherlands","type":"Not classified","open_roles":"1","roles_90_days":"0","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Jun 2026"},{"site":"Baarn","country":"Netherlands","type":"Not classified","open_roles":"1","roles_90_days":"0","hires_most_for":"Field & Service","engineering_share":"0%","seen_since":"Feb 2025"}],"as_of":"2026-11-14","cite":"Castellum Security Collective, Offices. Alion, Nov 14, 2026. https://alion.io/company/castellumsecurity/offices","html_url":"https://alion.io/company/castellumsecurity/offices","json_url":"https://alion.io/company/castellumsecurity/offices.json","license":"CC BY-SA 4.0","meta":{"source":"Alion","generated_at":"2026-11-14T06:11:56Z"}}