Castellum
As of 3 November 2026, Castellum has 20 open roles (3 new in 30 days), its engineering (non-software) team is hiring most, and its postings name Microsoft Excel, Microsoft Word and Microsoft PowerPoint as the tools the team works in.
As of 3 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- Headquarters
- Vienna, Virginia, United States
- Employees
- 51-200 employees (linkedin)
- Sells to
- department of defense, intelligence community, defense, government, and commercial customers
- Certifications on site
- Site languages
- EN
- Career system
- Adp
Castellum in one screen
Read from castellumus.com: what the company does, the customers it names, the buyers we can actually see, and the companies that sell the same thing.
Castellum is a technology and solutions company that provides intelligence analysis, software development, systems engineering, program management, electronic warfare, cybersecurity, and data analytics for national security. Its offerings include autonomous systems, model-based systems engineering, C-UAS, C5ISR, and products such as the XRA extended reality assistant and GuardTower. It operates through wholly owned subsidiaries including Corvus Consulting, Specialty Systems, Inc., and GTMR.
Named on the site: department of defense, intelligence community, defense, government, and commercial customers, commercial customers.
Nearest companies by what they do, sell and whom they serve, 51+ employees. 596 scored.
What Castellum says it runs
Tools named in the company's own postings as the team's systems, with the sentence that says so. What the website and DNS show is listed separately.
• Proficiency in Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint, Microsoft Project, and other software tools required to perform assigned duties.• Proficiency in Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint, Microsoft Project, and other software tools required to perform assigned duties.• Proficiency in Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint, Microsoft Project, and other software tools required to perform assigned duties.• Proficiency in Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint, Microsoft Project, and other software tools required to perform assigned duties.• Proficiency in Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint, Microsoft Project, and other software tools required to perform assigned duties.• Advanced proficiency across Microsoft Office applications.• Proficient in Microsoft Word, Excel, Outlook, PowerPoint, Project, and Adobe.• Knowledge of or experience using Adobe FrameMaker, Notepad++, or other XML authoring software.• Knowledge of or experience using Adobe FrameMaker, Notepad++, or other XML authoring software.• Experience with S1000D, MIL-STD-3001, and/or other applicable military specifications and standards.• Knowledge of or experience using Simplified Technical English and SGML/XML.• Experience with scripting (Bash, Python) and automation tools (Ansible, Terraform).• Experience with scripting (Bash, Python) and automation tools (Ansible, Terraform).• Experience with scripting (Bash, Python) and automation tools (Ansible, Terraform).Vendors whose code loads on castellumus.com or whose records sit in its DNS. Page plumbing (libraries, fonts, consent banners) is left out.
20 open roles, 16 opened in 90 days
Read hourly from the company's career system. Open roles and new roles in the last 30 days, by team. Companies hiring engineering (non-software) in United States →
| open · new 30 d | |
|---|---|
| Engineering (non-software) | 4 · 0 |
| IT operations & business systems | 3 · 0 |
| Product, program & project management | 3 · 1 |
| Software engineering | 2 · 0 |
| Arts media and entertainment | 1 · 0 |
| Data & AI | 1 · 0 |
| Logistics warehouse and transport | 1 · 1 |
| Public safety and protective services | 1 · 1 |
| Sales | 1 · 0 |
| Skilled trades and field service | 1 · 0 |
What is changing, read from the postings
Intents are events the employer states about itself, each with the sentence and the posting it came from.
No change signals read in the current postings.
Sales, marketing and IT leaders by function. Add Castellum to a monitor and get a webhook when a role opens, a tool appears or a signal is read.
Start free, no card. The first 20 are above; e-mails are verified at the mail server when you open them.
Companies like Castellum
Nearest by what they do, what they sell and whom they sell to, 51+ employees. 6 of 596 scored.
From the company's own website
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Castellum (Vienna, United States, 51-200 employees) has 20 open roles, 3 new in 30 days, and names 14 tools in its postings. (Breaknorm, 3 November 2026, https://breaknorm.co/company/castellumus.com)
Read from the source, not self-reported
Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →
- ProfileBuilt from castellumus.com: summary, offerings, customers, certifications and contact points are extracted from its pages, with a confidence score per field.
- HiringRead hourly from the company's Adp career site; reposts collapse into one record.
- Tech stackTools the employer's own text names as the team's systems, with the quote; website scripts counted separately.
- HeadcountLinkedIn where known, otherwise estimated from the site.
Castellum: questions
Does Castellum use Microsoft Excel?
Yes, by the company's own words: 5 postings name it, first seen 2026-08-21, in the arts media and entertainment team.
Is Castellum hiring?
20 open roles as of 3 November 2026, 3 opened in the last 30 days and 0 closed. The largest team hiring is engineering (non-software).
Where does this profile come from?
From castellumus.com itself: we crawled it on 2026-09-06, built the profile on 2026-09-12, and read its career site (Adp) hourly since. Headcount is from LinkedIn.
Who should I write to at Castellum?
The people are behind the login: decision makers by function, verified at the mail server when you open them. 1 public role addresses from the site are there too.
Get this company your way
The same data as a search, over MCP and the API, as bulk files, or pushed to you as it changes.
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