Red Team Security Engineer

Millennium; Charleston (SC); On-site; USD 120,000 - 180,000; Full time

Job summary

Millennium Corporation is seeking a Red Team Security Engineer to join our cybersecurity team in Charleston, SC. This role focuses on offensive security, including penetration testing, tooling development, and realistic adversary simulations to strengthen client defenses.

You will conduct engagements across enterprise environments, emulate sophisticated attack scenarios, and communicate findings and mitigations to internal teams.

Qualifications

• Bachelor's degree in a related technical field (Cybersecurity, CS, Engineering, Mathematics).
• 3+ years in software development, systems engineering, or networking, with 1+ year hands-on penetration testing.
• Proficiency with Python, PowerShell, and Bash scripting.
• Experience with web app security, TCP/IP, packet analysis, and offensive security tools like Kali Linux and Cobalt Strike.

Responsibilities

• Conduct penetration testing engagements against enterprise applications, systems, and customer networks.
• Perform Red Team operations emulating adversary TTPs.
• Develop and maintain custom tooling and payloads in Python, PowerShell, and Bash.
• Design, configure, and maintain test environments to support offensive assessments.
• Lead engagements from planning through final reporting and remediation recommendations.

Skills

Python

PowerShell

Bash scripting

Education

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

Tools

Kali Linux

Cobalt Strike

Job description

Millennium Corporation is seeking a skilled Red Team Security Engineer to join our cybersecurity team in Charleston, SC.

This role is ideal for an offensive security professional with experience conducting penetration testing, developing custom tooling, and emulating advanced adversary tactics. The selected candidate will support complex security assessments across enterprise environments while helping strengthen customer security through realistic attack simulations.

The Red Team Security Engineer will also:

• 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.

Qualifications

• 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.