Senior Cyber Security Engineer

General information

Requisition # R61273 Locations USA-VA-Herndon Posting Date 06/18/2025 Security Clearance Required None Remote Type Hybrid Time Type Full time

Description & Requirements

Unlock the secrets of intelligence with ManTech! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with ManTech!

ManTech seeks a motivated and mission-focused Senior Cyber Security Engineer to join our team in Herndon, Virginia. In this role, you will contribute to a high-priority mission by designing, implementing, and maintaining secure cloud architectures on AWS and Azure. You will work closely with Solutions Architects, Cloud Engineers, customer stakeholders, and compliance officers to align systems with federal security requirements. This position offers an exciting opportunity for a cybersecurity professional with a strong technical background and hands-on experience supporting secure, classified environments.
 

Responsibilities include but are not limited to:

• Designing and implementing cybersecurity architectures and controls in compliance with NIST, DoD, and federal civilian guidelines.
• Managing vulnerability assessment and remediation activities using tools such as Tenable, Qualys, or Nessus.
• Engineering solutions for endpoint protection, network segmentation, and SIEM integration, including Splunk, Microsoft Sentinel, or ELK Stack.
• Supporting the full Risk Management Framework (RMF) lifecycle, including system categorization, control selection, implementation, assessment, and continuous monitoring.
• Configuring and maintaining a suite of security tools including firewalls, IDS/IPS, endpoint protection platforms, and encryption services.
• Developing and updating comprehensive security documentation, such as System Security Plans (SSPs), Plans of Action and Milestones (POA&Ms), and incident response plans.
• Collaborating with SOC and government teams to analyze and respond to security incidents.
• Automating security monitoring, reporting, and compliance validation processes using scripting languages like PowerShell, Python, or Bash.
   

Minimum Qualifications:

• Bachelor’s degree in Cyber Security, Computer Science, or Information Security; or 4+ additional years of cybersecurity experience in lieu of a degree.
• 5+ years of experience in cybersecurity roles, with a minimum of 3 years supporting federal or defense customers.
• Demonstrated experience with:
  • NIST SP 800-53 and RMF processes
  • Endpoint Detection & Response (EDR) platforms
  • Firewalls, IDS/IPS, VPNs, and PKI
  • Security automation and scripting
  • Responding to POA&Ms
• Proven success supporting Authority to Design (ATD), Authority to Operate (AT