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 DescriptionOverview
SOSi is seeking a Penetration Tester III to support proactive cyber defense activities in alignment with our customer. This role is responsible for conducting penetration testing and red team activities, assessing security posture across enterprise environments, and supporting identification, validation, and reporting of vulnerabilities to improve cyber defense resilience.
Responsibilities
· Conduct penetration testing across enterprise systems, applications, and network environments
· Perform red team activities to evaluate security controls and identify exploitable weaknesses
· Support continuous penetration testing activities to assess evolving threats and vulnerabilities
· Conduct testing of IoT, mobile, and cloud environments
· Support High Value Asset (HVA) security assessments
· Apply testing methodologies and frameworks including MITRE ATT&CK, OSSTMM, OWASP, NIST, PTES, and ISSAF
· Identify, document, validate, and report vulnerabilities and recommended remediation actions
· Support cyber defense operations through coordination with security engineering, vulnerability management, and incident response teams
Qualifications
- Experience:
- Five (5) to seven (7) years of penetration testing experience
- Management or team lead experience
- Experience performing continuous penetration testing
- Experience conducting red team operations
- Experience performing IoT, mobile, and cloud penetration testing
- Experience supporting High Value Asset (HVA) assessments
- Experience applying MITRE ATT&CK, OSSTMM, OWASP, NIST, PTES, and ISSAF methodologies
- Education:
- Bachelor’s Degree
- Certifications:
Required:- GPEN or GXPN
- CISA AES HVA Lead or Technical Lead, or ability to obtain
- Plus one of the following:
- GRTP
- CRTL
- OSCP
- CRTP
- CMWAPT
- CEPT
- CPT
- LPT
- Clearance/Suitability: Secret (active)
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.
Skills Required
- Five to seven years of penetration testing experience
- Management or team lead experience
- Experience performing continuous penetration testing
- Experience conducting red team operations
- Experience performing IoT, mobile, and cloud penetration testing
- Experience supporting High Value Asset assessments
- Bachelor's Degree
- GPEN or GXPN certification
- Secret clearance (active)
SOSi Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SOSi and has not been reviewed or approved by SOSi.
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Healthcare Strength — Health coverage is considered a relative strength, with international plan options and substantial employer contribution that support OCONUS and travel-heavy work. Company materials also highlight a comprehensive medical offering alongside wellness support.
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Retirement Support — A 401(k) program is available, with indications of employer matching though specifics are not publicly detailed. This suggests foundational retirement support for eligible employees.
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Career-Linked Recognition & Rewards — Compensation is often characterized as competitive for cleared, hard‑to‑hire, and certain overseas or mission‑critical roles. Pay levels appear closely tied to contract demands, clearance, and location.
SOSi Insights
What We Do
SOSi is a technology and services integrator focused on the aerospace, defense, and government services industry, described as one of the largest private, founder-owned companies in its sector.
