Sr. Cyber Security Analyst

Centurion is seeking a Sr. Cyber Security Analyst to support various security operations and configurations. The role involves validating security configurations, managing vulnerabilities, and ensuring effective logging and monitoring of security systems.

Responsibilities:

• Assist with implementation and validation of CIS baseline configurations (L1 minimum)
• Secure configuration of endpoints, identities, and cloud services
• Validate security configurations across Entra ID (Azure AD), Intune-managed devices, Microsoft 365 services
• Identify and remediate configuration drift
• Validate agent deployment and reporting coverage
• Perform vulnerability triage and prioritization
• Track remediation progress and validate closure
• Identify gaps in scanning coverage (devices, subnets, cloud resources)
• Assist with configuration, tuning, and validation of Microsoft Defender for Endpoint, Defender for Cloud, and Defender for Identity
• Ensure devices are properly onboarded, telemetry is being received, and alerts are actionable and tuned
• Support Advanced Hunting queries and validation
• Assist configuration and install of ARC on servers
• Validate log ingestion into Microsoft Sentinel and/or SIEM
• Ensure telemetry coverage across endpoints, identities, and cloud applications
• Identify gaps in logging or integration
• Assist in alert tuning and reduction of false positives
• Validate integrations (e.g., Okta, Defender, M365, network tools)
• Okta MFA support
• Access Reviews
• Validate security posture before, during, and after migration waves
• Identify and escalate security gaps introduced by migration activities
• Mobile Device MAM/MDM support
• Design and Concept Review, in particular to cover AI workloads and telemetry received via Defender CSPM/AI modules
• Definition and implementation of related Purview Rules, Intune Policies, Varonis Configuration, CSPM/AI Monitoring and the related Sentinel Alerting, BAU process (playbooks, support, changes)
• Creation of Documentation and Training Material in SCORM 2.0 format in collaboration with our internal training department

Requirements:

• Contractor must be a U.S. citizen
• Experience with Defender, Sentinel, Intune, Entra ID, Okta, Tenable, Purview, Varonis, AI solutions and related security monitoring, SCORM 2.0
• Knowledge of NIST 800-171 / CMMC
• SOC / security operations experience
• Past Performance in support during IT transformations
• Defender/SIEM operations experience
• Vulnerability management experience
• DLP rollout based on Varonis and Purview
• Preferred certifications: SC-200, CISSP