Senior Cybersecurity Engineer

Phoenix Operations Group is seeking a Senior Cybersecurity Engineer to design, implement, and safeguard secure enterprise and cloud systems supporting critical government and national security missions. This role focuses on security architecture, vulnerability management, hardening, RMF/ATO support, and compliance activities in government environments.

Key Responsibilities

• Design, implement, and maintain cybersecurity solutions across enterprise and cloud environments.
• Perform security assessments, vulnerability analysis, and remediation activities.
• Implement security controls aligned with NIST 800-53 and applicable government standards.
• Support Risk Management Framework (RMF) activities and Authorization to Operate (ATO) processes.
• Conduct security configuration reviews and execute system hardening efforts.
• Implement and maintain DISA Security Technical Implementation Guides (STIGs).
• Use vulnerability management tools such as ACAS and Tenable.
• Conduct security architecture reviews and technical risk assessments.
• Collaborate with systems engineers, cloud architects, and DevSecOps teams.
• Develop cybersecurity documentation and remediation plans.
• Support continuous monitoring and security compliance initiatives.

Required Qualifications

• Extensive experience in cybersecurity engineering, information assurance, or systems security.
• Strong understanding of NIST 800-53, RMF, and government security requirements.
• Experience with vulnerability assessment and remediation.
• Hands-on experience implementing DISA STIGs and performing security hardening.
• Experience with ACAS, Tenable, or comparable security assessment tools.
• Understanding of enterprise networking, operating systems, and cloud security.
• Strong analytical, troubleshooting, and technical documentation skills.
• Experience supporting DoD or Intelligence Community environments.
• Experience securing AWS, Azure Government, or classified cloud environments.
• Relevant certifications such as CISSP, CASP+, Security+, or other relevant certifications.
• Experience with eMASS, Xacta, or other RMF platforms.
• Experience with DevSecOps and automated security controls.
• Bachelor’s degree in Cybersecurity, Computer Science, Information Technology, or a related discipline, or equivalent professional experience.
• Senior-level cybersecurity engineering experience required.

Technologies

• NIST 800-53
• Risk Management Framework (RMF)
• Authorization to Operate (ATO)
• DISA Security Technical Implementation Guides (STIGs)
• ACAS
• Tenable
• eMASS
• Xacta
• AWS
• Azure Government
• CISSP
• CASP+
• Security+
• DevSecOps

Benefits

• Medical, dental, and vision insurance with premiums fully paid by the company.
• Short-term disability, long-term disability, and life insurance, fully paid by the company.
• Automatic 10% company contribution to the 401(k); no matching contribution is required.
• Four weeks of paid time off annually.
• Eleven paid holidays per year.
• Paid birthday leave.
• Upfront and annually recurring referral bonuses.
• Bonuses for contributing to company GitHub projects.
• Paid training, certifications, and professional enrichment opportunities.

Security Clearance

Must possess an active U.S. Department of Defense (DoD) security clearance. Specific clearance level and access requirements are subject to contract requirements.

Location and Work Setting

Charleston, SC (onsite).