Red Team Security Engineer: Offensive Security Expert

Millennium Corporation; Charleston (SC); On-site; USD 110,000 - 160,000; Full time

Job summary

Millennium Corporation in Charleston, SC, is seeking a Red Team Security Engineer to join our cybersecurity team. This role focuses on offensive security, penetration testing, and developing custom tooling to emulate advanced adversary tactics.

The engineer will support complex security assessments across enterprise environments, design test environments, manage engagements from planning to reporting, and collaborate with internal teams to communicate risks and remediation strategies.

Qualifications

• Active Top Secret Clearance.
• Bachelor’s degree in Cybersecurity, Computer Science, Engineering, Mathematics, or a related technical field.
• Active DoD 8570 IAT Level II certification (Security+ CE, CySA+, CND, CCNA Security, or equivalent).
• One of the following certifications, or the ability to obtain within one year of hire: OSCP, OSWE, CRTO, CPTS, CBBH, PNPT, GRTP, GX-PT, or GXPN.
• 3+ years of experience in software development, systems engineering, or computer networking, including 1+ year of hands‑on penetration testing experience.
• Proficiency with Python, PowerShell, and Bash scripting.
• Experience with web application security assessments, TCP/IP networking, packet analysis, and offensive security tools such as Kali Linux and Cobalt Strike.
• Understanding of Red Team command-and-control (C2) infrastructure, emerging threats, vulnerabilities, and exploitation techniques.
• Strong analytical, organizational, and communication skills, with the ability to work independently and manage penetration testing engagements from planning through reporting.

Responsibilities

• Conduct penetration testing engagements against enterprise applications, systems, and global customer networks.
• Perform Red Team operations that emulate sophisticated adversary tactics, techniques, and procedures (TTPs).
• Research emerging vulnerabilities, exploitation methods, and threat vectors to improve offensive capabilities.
• Develop and maintain custom tools, scripts, and payloads using languages such as Python, PowerShell, and Bash.
• Design, configure, and maintain representative test environments to support offensive security assessments.
• Manage penetration testing and Red Team engagements from planning through final reporting and remediation recommendations.
• Analyze network traffic, packet captures, and system behavior using protocol analyzers and security assessment tools.
• Utilize offensive security platforms and toolsets, including Kali Linux, Cobalt Strike, and other industry-standard frameworks.
• Collaborate with internal teams to communicate findings, technical risks, and mitigation strategies.
• Participate in technical training, industry conferences, and cybersecurity exercises to maintain certifications and remain current on evolving threats.

Skills

Penetration testing

Red Team operations

Python scripting

PowerShell scripting

Bash scripting

Network analysis

Cobalt Strike

Vulnerability research

Education

Bachelor’s degree in Cybersecurity/CS/Engineering/Math

DoD 8570 IAT Level II certification

OSCP/OSWE/CRTO/CPTS/CBBH/PNPT/GRTP/GX-PT/GXPN certifications

Tools

Kali Linux

Cobalt Strike

Job description

Millennium Corporation in Charleston, SC, is seeking a Red Team Security Engineer to join our cybersecurity team. This role focuses on offensive security, penetration testing, and developing custom tooling to emulate advanced adversary tactics.

The engineer will support complex security assessments across enterprise environments, design test environments, manage engagements from planning to reporting, and collaborate with internal teams to communicate risks and remediation strategies.