Senior Cybersecurity Engineer: Tier 3 Incident & SIEM Lead

Quantum Technologies. LLC; Atlanta (GA); On-site; USD 83,000 - 118,000; Full time

Job summary

Quantum Technologies. LLC in Atlanta, GA is seeking a Sr. Level CyberSecurity Engineer for a 10-month engagement to protect digital assets and lead Tier 3 incident responses. You will manage security tools, cloud security, and collaborate with MSSPs to ensure SLAs and defense quality.

The role requires 5+ years in cybersecurity, hands-on experience with CrowdStrike, Proofpoint, Microsoft Defender, SIEMs, and firewall administration. Excellent communication and documentation skills are essential.

Qualifications

• 5+ years of hands-on experience in cybersecurity roles.
• Strong experience with CrowdStrike Falcon, Proofpoint Email Security, Microsoft Security Suite.
• Experience with SIEM platforms (Splunk, Sentinel, QRadar, Elastic).
• Interoperating with MSSPs and third-party vendors.
• Solid understanding of network, endpoint, and cloud security.

Responsibilities

• Tier 3 escalation for security incidents and investigations.
• Manage and optimize security tools across the enterprise.
• Create, review, and troubleshoot Palo Alto firewall rulesets.
• Administer CrowdStrike EDR and Proofpoint Email Security.
• Operate and tune SIEM platforms; craft alert use cases.
• Leverage Microsoft Cloud Security Tools to secure cloud environments.
• Lead Vulnerability Management: scan, prioritize, coordinate remediation.
• Coordinate with MSSPs to meet SLAs and quality standards.
• Conduct threat hunting, vulnerability assessments, and risk analysis.
• Develop security runbooks and incident response procedures.
• Stay current with emerging threats and regulatory requirements.

Skills

5+ years of cybersecurity experience

Tier 3 escalation

Cross-functional collaboration

Analytical/problem-solving

Excellent communication

Education

Bachelor’s degree in Cybersecurity/CS

Security certifications (e.g., CISSP, CEH, CompTIA Security+)

Tools

CrowdStrike Falcon

Proofpoint Email Security

Microsoft Defender Suite

SIEM platforms (Splunk, Sentinel, QRadar, Elastic)

Palo Alto Next-Gen Firewall

Job description

Quantum Technologies. LLC in Atlanta, GA is seeking a Sr. Level CyberSecurity Engineer for a 10-month engagement to protect digital assets and lead Tier 3 incident responses. You will manage security tools, cloud security, and collaborate with MSSPs to ensure SLAs and defense quality.

The role requires 5+ years in cybersecurity, hands-on experience with CrowdStrike, Proofpoint, Microsoft Defender, SIEMs, and firewall administration. Excellent communication and documentation skills are essential.