Teams at Caelum Research Corporation

Designs, implements, administers, and optimizes enterprise Microsoft 365 environments, including Exchange Online, Teams, SharePoint, Intune, Entra ID, Defender, and Purview. Manages identity, security, compliance, governance, migrations, endpoint management, monitoring, troubleshooting, and Tier 3 support. Develops automation using PowerShell, Microsoft Graph API, and Power Automate. Documents solutions, collaborates with cybersecurity teams, coordinates with Microsoft Support, and mentors junior administrators.

Monitors and investigates cybersecurity alerts and incidents across enterprise and mission systems. Performs threat hunting, root-cause analysis, vulnerability assessments, incident response, and remediation support. Correlates data from SIEM, EDR, IDS/IPS, firewalls, and other security platforms; develops threat intelligence reports; documents findings; supports RMF and compliance activities; and collaborates with infrastructure and security teams.

Administers and supports Azure and Microsoft 365 environments, including subscriptions, virtual machines, applications, user accounts, licenses, identity and access controls, Teams, SharePoint, and Exchange Online. Troubleshoots technical issues, supports end users, monitors resources, conducts security audits, maintains documentation, and participates in on-call support. Requires strong cloud, Active Directory, PowerShell, networking, communication, and problem-solving skills, along with an active Secret clearance.