Senior Cybersecurity Engineer – Enterprise Defense SME

Sosi1; Washington (District of Columbia); On-site; USD 140,000 - 180,000; Full time

Job summary

SOSI is seeking a Senior Cybersecurity Engineer to serve as a technical SME supporting an enterprise cyber defense program for a federal customer. This senior role sits at the intersection of security engineering, architecture, and operations in the Washington, DC metro area and requires the ability to obtain a Secret clearance.

You will assess security architectures, identify gaps, and design risk-based improvements across on‑premises, cloud, and mobile environments.

Qualifications

• Bachelor's degree in a relevant field or equivalent experience.
• Experience implementing offensive and defensive cybersecurity solutions to detect and mitigate threats.
• Experience with incident response methodologies, policies, and remediation planning.
• Understanding of MITRE ATT&CK and D3FEND frameworks and mapping to tool implementations.

Responsibilities

• Serve as a senior technical advisor on enterprise security architecture, engineering, and defensive operations.
• Conduct security architecture reviews, identify gaps, and develop risk management recommendations.
• Translate requirements into security requirements, baselines, and concepts of operation.
• Plan, integrate, and tune security tooling across monitoring, detection, automation, and threat intelligence platforms.
• Lead market research, evaluations, and proofs of concept for emerging cybersecurity technologies.
• Support security of cloud environments (IaaS, PaaS, SaaS) and integrate security into DevSecOps pipelines.
• Provide security engineering support for identity, authentication, and mobile security initiatives.
• Advise on cryptographic modernization efforts and secure AI adoption.
• Develop scripts/automation to improve efficiency and document findings for leadership.

Skills

Security architecture

Incident response

Threat detection

DevSecOps

Cloud security

Threat intelligence

Education

Bachelor's Degree

Tools

SIEM tools

Threat intelligence platforms

Job description

SOSI is seeking a Senior Cybersecurity Engineer to serve as a technical SME supporting an enterprise cyber defense program for a federal customer. This senior role sits at the intersection of security engineering, architecture, and operations in the Washington, DC metro area and requires the ability to obtain a Secret clearance.

You will assess security architectures, identify gaps, and design risk-based improvements across on‑premises, cloud, and mobile environments.