Security Engineer

MANTECH; Miami (FL); On-site; USD 110,000 - 140,000; Full time

Job summary

MANTECH is seeking a motivated Security Engineer to join our team in Doral, Florida. You will design, deploy, configure, and support F5 BIG-IP appliances (LTM, APM, ASM) and manage RSA SecurID MFA deployments for mission networks.

Collaborating with cross-functional teams, you will maintain Infoblox DNS/DHCP/IPAM infrastructure, perform patch management, and enhance security posture through baseline configuration and documentation. A TS/SCI clearance is preferred.

Qualifications

• 5+ years of network security engineering experience.
• Experience with F5 BIG-IP LTM/APM/ASM configurations and troubleshooting.
• Proven experience configuring RSA SecurID systems and Infoblox DDI infrastructure.
• Strong background in SSL/TLS offloading, access management, and traffic management.
• Experience maintaining baselines, configuration controls, and patch deployment schedules.
• Ability to create, maintain, and communicate complex engineering documentation and diagrams.

Responsibilities

• Design, deploy, configure, and administer F5 BIG-IP LTM, APM, and ASM.
• Manage RSA SecurID MFA infrastructure and token deployments across networks.
• Administer Infoblox DNS, DHCP, and IPAM services; monitor health and uptime.
• Collaborate with engineers and sysadmins to ensure secure access control and traffic management.
• Perform patch management, security upgrades, and baseline configuration updates.
• Maintain documentation and engineering records across physical and virtual environments.
• Recommend continuous improvements to enhance redundancy and security posture.

Skills

F5 BIG-IP

RSA SecurID

Infoblox DDI

DNS/DHCP analysis

SSL/TLS offloading

Documentation

Traffic management

Education

Bachelor's degree

Master's degree

Associate’s degree

High school diploma

Tools

F5 BIG-IP

RSA SecurID

Infoblox DDI

Job description

MANTECH seeks a motivated, career and customer-oriented Security Engineer to join our team in Doral, FL.

Responsibilities Include But Are Not Limited To

• Designing, deploying, configuring, and administering F5 BIG-IP Local Traffic Managers (LTM), Access Policy Managers (APM), and Application Security Managers (ASM).
• Managing, configuring, and maintaining RSA SecurID Authentication Manager infrastructure and multifactor authentication (MFA) token deployments across mission networks.
• Administering, optimizing, and troubleshooting Infoblox Grid enterprise DNS, DHCP, and IP Address Management (IPAM) core network services.
• Collaborating with cross-functional technical teams, network engineers, and system administrators to maintain secure system access control and traffic management.
• Conducting routine system patch management, security upgrades, baseline configuration management, and diagnostic troubleshooting for specialized security appliances.
• Maintaining system baselines, configuration management records, and engineering documentation across physical and virtual network environments.
• Recommending and implementing continuous engineering process improvements to enhance system redundancy, security compliance, and traffic performance.

Minimum Qualifications

• Bachelor’s degree in Systems Engineering, Computer Science, Information Technology, or a related field with 5+ years of experience in network security engineering.
• OR a master’s degree and 3+ or more years of relevant experience
• OR an associate’s degree and 7+ or more years of relevant experience
• OR a high school diploma and 9+ or more years of relevant experience
• Proven experience configuring, administering, and troubleshooting F5 BIG-IP appliances (LTM, APM, ASM), RSA SecurID systems, and Infoblox DDI infrastructure.
• Strong background in network security engineering, SSL/TLS offloading, access management, DNS/DHCP protocol analysis, and traffic management.
• Experience maintaining system baselines, configuration management controls, and security patch deployment schedules.
• Experience creating, maintaining, and communicating complex technical engineering documentation and architecture diagrams.

Preferred Qualifications

• Relevant professional certifications such as F5 Certified Technology Specialist (F5-CTS), Infoblox Core Certified Administrator (ICCA), RSA Certified Administrator, or CompTIA Security+.
• Prior experience supporting U.S. Military Command operations, Combatant Command environments, or Department of Defense enterprise technical environments.
• Familiarity with DoD STIG compliance, automated vulnerability management (ACAS), and secure baseline auditing procedures.
• Demonstrated ability to collaborate effectively across multi-disciplinary engineering teams in fast-paced operational environments.

Clearance Requirements

• Must hold a current/active TS/SCI security clearance.

Physical Requirements

• Must be able to remain in a stationary position 50%.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.