Senior Cybersecurity Engineer & Defense Architect

SOS International LLC; Washington (District of Columbia); On-site; USD 120,000 - 249,000; Full time

Job summary

SOSI is seeking a Senior Cybersecurity Engineer to support an enterprise cyber defense program for a federal customer in the Washington, DC metropolitan area. The role combines security engineering, architecture, and operations, with responsibility to advise government stakeholders on threats and technologies.

The candidate will assess security architecture, identify gaps, design solutions for on-prem, cloud, and mobile environments, and lead evaluations and proofs of concept for new security

Qualifications

• Five (5) years security-related experience.
• Experience implementing tools and processes to support comprehensive offensive and defensive cybersecurity solutions to identify, detect and mitigate sophisticated cybersecurity threats.
• Experience with incident response methodologies, cyber defense policies and procedures and the ability to perform damage assessments and determine remediation paths.
• Experience in intrusion and threat detection methodologies for cloud, host, network and mobile environments.

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 operational and mission requirements into security requirements, control baselines, and concepts of operation.
• Plan, integrate, and tune security tooling across monitoring, detection, automation, and threat intelligence platforms.
• Lead market research, technical evaluations, and proofs of concept for emerging cybersecurity technologies.
• Support the security of cloud environments (IaaS, PaaS, SaaS) and integrate security practices into DevSecOps pipelines.
• Provide security engineering support for identity, authentication, and mobile security initiatives.
• Support cryptographic modernization efforts, including discovery, inventory, and planning for next-generation encryption standards.
• Advise on the secure adoption of AI and generative AI technologies.
• Apply incident response methods and support complex investigations as a technical escalation resource.
• Develop scripts and automation to improve efficiency in security engineering and operations tasks.
• Produce clear technical documentation, briefings, and recommendations for government and program leadership.
• Mentor team members and contribute to continuous improvement of engineering processes.

Skills

Offensive and defensive cybersecurity

Incident response

Threat detection

Security architecture

Cloud security (IaaS/PaaS/SaaS)

MITRE ATT&CK & D3FEND

Digital forensics

Scripting/Automation

Education

Bachelor's Degree

DOD 8140 certifications / CSSP Analyst or equivalent

Tools

SIEM tools

Threat intelligence platforms

Sandboxing tools

Reverse engineering tools

Cryptographic tooling

Job description

SOSI is seeking a Senior Cybersecurity Engineer to support an enterprise cyber defense program for a federal customer in the Washington, DC metropolitan area. The role combines security engineering, architecture, and operations, with responsibility to advise government stakeholders on threats and technologies.

The candidate will assess security architecture, identify gaps, design solutions for on-prem, cloud, and mobile environments, and lead evaluations and proofs of concept for new security