Cyber Defense Engineer – Microsoft 365 & SIEM

Stafford County; Stafford (VA); On-site; USD 97,000 - 133,000; Full time

Job summary

Stafford County is seeking a Cyber Security Engineer to protect the county's information systems, Microsoft 365 environment, cloud services, endpoints, data, and digital assets. The role emphasizes security engineering, SIEM, vulnerability management, incident response, and policy compliance.

The ideal candidate will have 5–7 years of cyber security experience with strong knowledge of Microsoft 365 security, SIEM, vulnerability management, and risk-based remediation.

Qualifications

• Bachelor's degree in information security, computer science, cyber security, or related field.
• 5–7 years of combined cyber security experience preferred.
• Experience with Microsoft 365 security administration, SIEM, and vulnerability management.

Responsibilities

• Administers Microsoft 365 security, compliance, identity, email, device, and data protection.
• Operates and enhances the SIEM and security monitoring program with dashboards and alerts.
• Monitors, triages, and documents security incidents across cloud, endpoint, and network environments.
• Coordinates incident response operations including containment, eradication, and recovery.
• Manages vulnerability management programs, prioritization, and remediation tracking.
• Performs threat hunting and investigations using threat intelligence and telemetry.
• Collaborates with teams to securely design and integrate systems and data architectures.
• Maintains cybersecurity standards, playbooks, and technical documentation.

Skills

Cybersecurity engineering

SIEM

Microsoft 365 security

Vulnerability management

Incident response

Cloud security

Threat analysis

Communication skills

On-call readiness

Risk management

Education

Bachelor's degree in information security, computer science, cyber security, or related field

Tools

Microsoft 365 security tools

SIEM platforms

Vulnerability scanners

IDS/IPS systems

Job description

Stafford County is seeking a Cyber Security Engineer to protect the county's information systems, Microsoft 365 environment, cloud services, endpoints, data, and digital assets. The role emphasizes security engineering, SIEM, vulnerability management, incident response, and policy compliance.

The ideal candidate will have 5–7 years of cyber security experience with strong knowledge of Microsoft 365 security, SIEM, vulnerability management, and risk-based remediation.