Cybersecurity Security Engineer III

Apply Now ↗

About this role

Company Description

Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide.

Job Description

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

Overview

SOSi is seeking a Cybersecurity Security Engineer III to support cybersecurity engineering activities in alignment with our customer. This role is responsible for supporting security architecture, engineering, technology integration, and modernization initiatives across enterprise cyber defense environments, including Zero Trust, cloud security, DevSecOps, and emerging technologies.
 

Responsibilities

·  Support cybersecurity engineering and security architecture activities across enterprise environments

·  Support design and integration of Zero Trust Architecture (ZTA) capabilities and security controls

·  Develop and support technology roadmaps, engineering recommendations, market research, and proofs of concept

·  Support engineering and integration of cloud security, secure authentication, and single sign-on (SSO) capabilities

·  Support DevSecOps practices and secure technology integration activities

·  Support security engineering activities involving vulnerability scanning tools, cyber defense technologies, and enterprise security platforms

·  Support engineering and integration of AI/GenAI-related security capabilities

·  Support post-quantum cryptography concepts, cryptographic inventory activities, and PQC-enabled protocols

·  Support development and implementation of security CONOPS and engineering documentation

·  Use scripting and automation to support engineering, integration, and security operations activities

 

Qualifications

·  Experience:

  • Ten (10) or more years of cybersecurity engineering and/or project management experience
  • Two (2) or more years of leadership experience
  • Experience supporting cybersecurity design and integration
  • Experience supporting Zero Trust Architecture (ZTA)
  • Experience developing technology roadmaps, conducting market research, and supporting proofs of concept
  • Experience supporting security architecture and CONOPS
  • Experience supporting cloud security
  • Experience supporting AI/GenAI security integration
  • Experience supporting DevSecOps
  • Experience supporting vulnerability scanning tools
  • Experience supporting secure authentication and SSO
  • Experience supporting post-quantum cryptography concepts and PQC-enabled protocols
  • Experience with scripting and automation

·  Education:

  • Bachelor’s Degree in engineering, information systems, cybersecurity, or equivalent experience as defined by role requirements

·  Certifications: 

At least one of:

  • Security+ 
  • CCNA 
  • SSCP 

And one of:

  • CISSP 
  • CISSP-ISSAP 
  • CISSP-ISSEP 
  • CCSP
  • GCIA
  • GDSA
  • GCCC
  • GCPN
  • GCIH
  • Clearance/Suitability: Secret (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.

Frequently Asked Questions

Is the salary disclosed for the Cybersecurity Security Engineer III position at sosi1?
The salary for this Cybersecurity Security Engineer III role at sosi1 is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Cybersecurity Security Engineer III position at sosi1 located?
This Cybersecurity Security Engineer III role at sosi1 is based in DC, Washington, Washington, DC, United States, us. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Cybersecurity Security Engineer III role at sosi1 full-time or part-time?
This is listed as a Full time position. It is posted as a Cybersecurity Security Engineer III role at sosi1.
How do I apply for the Cybersecurity Security Engineer III position at sosi1?
Click the "Apply Now" button on this page. You will be redirected to sosi1's official application portal hosted on smartrecruiters where you can submit your application directly.
When was the Cybersecurity Security Engineer III job at sosi1 posted?
This Cybersecurity Security Engineer III position at sosi1 was posted on Jun 4, 2026. Apply as soon as possible — early applications are often reviewed first.
Cybersecurity Security Engineer III
sosi1
Apply for this role ↗

You'll be redirected to sosi1's official application page on SmartRecruiters.