Penetration Tester Journeyman

OneZero Solutions; Alexandria (VA); Hybrid; USD 110,000 - 120,000; Full time

Benefits offered by this job

Health, Dental, Vision, Life Insurance

401(k) with company matching

Paid time off and holidays

Employee referral program

Educational assistance

Job summary

OneZero Solutions, LLC is seeking a Penetration Tester Journeyman in Alexandria, VA with hybrid work arrangements and an active Top Secret with SCI eligibility clearance. The role covers adversary simulation, infrastructure, and penetration testing to assess DoD cyber readiness.

Responsibilities include executing phishing campaigns, leveraging C2 frameworks, and delivering actionable reports. The team emphasizes secure, mission-focused outcomes and ongoing professional growth.

Qualifications

• Hands-on security and network defense experience.
• Experience with phishing campaigns or social engineering.
• Red team and pen-testing experience.
• Familiarity with malware development and EDR/AV bypass.
• Proficient in PowerShell, C, C++, or Python.
• Experience using C2 frameworks such as Cobalt Strike, Sliver, Havoc.

Responsibilities

• Adversary emulation to assess Coast Guard network resilience.
• Develop reports and briefs with findings and recommendations.
• Scripted cyber threat emulation exercises to train DoD teams.
• Coordinate with teams on security assessments and deliverables.
• Monitor and manage tools during engagements.

Skills

PowerShell

Python

C/C++

Red team

Penetration testing

Phishing campaigns

C2 frameworks

EDR bypass

Network security

Education

BA/BS or equivalent

GPEN

CISSP

CISA

GCED

Tools

Cobalt Strike

Sliver

Havoc

Mythic

BloodHound

Job description

We are an employee-centric company that truly values our team members and the contributions they make to our customers and the missions they support. We pride ourselves on being forward-leaning thinkers and on building teams that are, and continue to be, technically proficient across a broad range of cyber mission areas. OneZero full-time employees receive a highly competitive benefits package, including health, dental, vision, and life insurance, a 401(k) with company matching, paid time off and holidays, an employee referral program, and educational assistance. Additional details are available on our website: https://www.onezerollc.com/careers/

Position Title

Penetration Tester Journeyman

Location

Alexandria, VA Hybrid

Clearance

Active Top Secret with SCI eligibility security clearance

Position Summary

Adversary Simulation

• Deploy, configure, and operate C2 frameworks such as Cobalt Strike, Havoc, Mythic, and Sliver.
• Apply TTPs for initial access, lateral movement, privilege escalation, persistence and data exfiltration.
• Leverage proprietary and open-source offensive security tool sets effectively to achieve engagement objectives.
• Execute phishing assessments.

Infrastructure

• Monitor, manage, and maintain cloud and on-premise infrastructure used during assessments.
• Understanding the use of Git Repositories for maintaining operational tools and scripts.

Penetration Testing

• Internal and external penetration testing.
• Network mapping and enumeration.
• Assess web and mobile applications.
• Perform database scans.
• Assess Active Directory attack paths using tools such as BloodHound.

Security Assessments

• Assessing Coast Guard's cyber security posture of operational networks through adversary emulation.
• Develop reports and briefs detailing findings and recommendations for all assessments completed.
• Perform cyber threat emulation during scripted exercises, to train DoD Cyber Protection Teams

Required Qualifications

• Relevant Years of Experience: 2 to 3 years
• Hands on experience with computers and network security.
• Experience conducting phishing campaigns or social engineering.
• Hands on experience with red team tasks and pen testing.
• Familiarity with malware development and EDR/AV bypass strategies.
• Experience with PowerShell, C, C++, or Python.
• Hands on experience utilizing Command and Control (C2) Frameworks such as Cobalt Strike, Sliver, Havoc, etc.

Certifications: IAT II : Any one of the following

• GPEN, Red Team Apprentice Course (RTAC), or equivalent
• Examples or required certifications: IAT level II:
• CompTIA Security+ CE
• CompTIA CySA+
• CCNA Security
• GICSP
• GSEC
• SSCP

IAT level III: Any one of the following

• CASP+ CE (also called SecurityX)
• CISSP (or Associate)
• CISA
• CCNP Security
• GCED
• GCIH

Education

BA/BS or equivalent years of relevant experience

OneZero Solutions, LLC is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws.

To request an accommodation, please contact us at [e-mail] or call [phone].

Salary: $110000 - $120000