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SOSi

Cyber Security Engineer SME

Washington, DC, United States

$119,803 to $248,822 USD / year

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Job details

Pay: $119,803 to $248,822 USD / year
Posting language: English
Posted: Nov 9, 2026

Original job description

Company Description Founded in 1989 and headquartered in Reston, Virginia, SOSi is a private defense and government solutions business specializing in advanced technology systems and mission support. Its capabilities include data science, software development, network engineering, intelligence, surveillance, and reconnaissance (ISR), and logistics.

Job Description

*** This position is contingent upon contract award ***

Overview

SOSI is seeking a Senior Cybersecurity Engineer to serve as a technical subject matter expert supporting an enterprise cyber defense program for a federal customer. This senior, highly visible role sits at the intersection of security engineering, architecture, and operations. It shapes how the customer evaluates, integrates, and matures its defensive capabilities. The ideal candidate combines hands-on engineering depth with the judgment to advise government stakeholders on emerging threats and technologies. This position is located in the Washington, DC metropolitan area and requires the ability to obtain a Secret clearance.

Job Description

The Senior Cybersecurity Engineer serves as a trusted technical advisor across a broad defensive cybersecurity portfolio. In this role, you will assess the customer’s security architecture, identify gaps, and design practical solutions that strengthen detection, response, and protection across on-premises, cloud, and mobile environments. You will lead technical evaluations and proofs of concept for new security technologies and translate findings into clear recommendations for leadership. You will work closely with security operations, engineering, and system owner teams. Together, you will turn operational needs into defined security requirements and controls, help integrate security into development and deployment pipelines. The role also supports the customer’s adoption of emerging technology areas, including AI-enabled capabilities and cryptographic modernization. Success in this position requires technical breadth, sound engineering judgment, and the ability to communicate complex security concepts to both technical and non-technical audiences.

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

Qualifications

Experience:

Five (5) years security-related experience

Required:
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, categories and timelines, cyber defense policies and procedures and the ability to perform damage assessments determine remediation paths
Experience in intrusion and threat detection methodologies for cloud, host, network and mobile environments
Experience in the use and tuning of security event correlation tools
Understanding of attack classes, attack stages and adversary behaviors
Knowledge of MITRE ATT&CK and D3FEND frameworks and the ability to map those to enterprise cybersecurity tool implementations and investments
Desired:
Experience with digital media analysis and digital forensics
Experience conducting static and dynamic analysis (sandboxing, reverse engineering) of malicious binaries to understand adversary TTPs, identify C2 infrastructure and extract IOCs
Experience correlating forensic findings with SOC alerts, threat intelligence, and adversary TTPs
Knowledge of network security architecture, topology and communication principles
Understanding of network protocols (TCP/IP, DHCP, DNS, directory services)
Understanding of clous service models and their impact on incident response capabilities
Knowledge of system administration, OS hardening and application security threats
Education: Bachelor’s Degree
Certifications: Any 1 of: CISSP (associate), CCSP, SSCP, GMON, GCIH, GCIA, or equivalent GIAC certification, CEH, CASP AND any 1 from the CSSP Analyst, Infrastructure Support, or IR from the DOD 8140 list (or other similar certifications as approved by Government)
Clearance/Suitability: Secret (active); Top Secret, SCI Clearance (eligible)

Additional Information Work Environment

Normal office conditions with potential to perform duties in deployed locations.
Core hours of operation are Monday through Friday, 0600 – 1700.
May be requested to work evenings and weekends to meet program and contract needs.

Working at SOSi All interested individuals will receive consideration and will not be discriminated against for any reason.

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More about this job

Skills

Cybersecurity
Logistics
Leadership
Security regulations
Risk management
Market research
Incident response
Documentation
Process improvement
Engineering processes
MITRE ATT&CK
Reverse engineering
Communication principles
DHCP
DNS
System administration
Security threats
CISSP

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