Cybersecurity Sr Engineer

General Dynamics Information Technology•Rockville, MD

2d•Remote

About The Position

GDIT is seeking a hands-on Senior Cybersecurity Engineer to design, implement, operate, and continuously improve security infrastructure across on-premises data centers and cloud environments supporting business and critical scientific workloads. The role spans architecture and implementation, including defining security patterns and policies, configuring infrastructure, troubleshooting complex issues, and automating security operations. The position is mostly remote, with occasional onsite requirements in Rockville, Maryland, and requires travel of less than 10%. The schedule is 40 hours per week.

Requirements

Bachelor's degree and at least 5 years of hands-on cybersecurity engineering experience, or at least 8 years of cloud security engineering experience in lieu of a degree.
Demonstrated experience designing, deploying, managing, and troubleshooting Palo Alto Networks firewalls and hybrid network security architectures.
Experience with Palo Alto Panorama, Prisma Cloud, and/or related Palo Alto technologies.
Experience securing hybrid on-premises/AWS environments.
Experience with Terraform, Ansible, Python, Bash, APIs, or other infrastructure/security automation technologies.
Strong understanding of networking and security fundamentals, including TCP/IP, DNS, HTTP/HTTPS, network segmentation, VPNs, TLS/PKI, encryption, IAM, Zero Trust, and threat detection/prevention.
Experience troubleshooting complex security and network issues.
Must be able to obtain and maintain a Public Trust.
U.S. citizenship is not required.

Nice To Haves

Experience designing and implementing security controls for AWS multi-account and hybrid-cloud environments.
Experience deploying and managing AWS security capabilities, including Network Firewall, WAF, Shield, Security Groups/NACLs, GuardDuty, Security Hub, CloudTrail, Config, IAM/Identity Center, KMS, VPC, and Transit Gateway controls.
Experience using LLMs, AI agents, or generative AI tools to automate engineering, security, or compliance workflows.
Experience implementing security and compliance controls aligned with NIST, FISMA, FedRAMP, or similar frameworks.
Palo Alto Networks certifications such as PCNSE, or equivalent practical experience.

Responsibilities

Design, deploy, manage, and optimize Palo Alto Networks next-generation firewalls, including security policies, NAT, routing, VPN, application controls, threat prevention, and URL filtering.
Design secure connectivity, segmentation, and security boundaries between cloud and on-premises environments.
Manage firewall high availability, upgrades, lifecycle, capacity, and policy optimization.
Modernize the environment to use Infrastructure as Code technologies such as Terraform and/or Ansible.
Support security controls and evidence mapping aligned with NIST 800-53/800-171, FedRAMP, and FISMA.
Evaluate existing security architectures and identify improvements in security, resiliency, scalability, performance, and operational efficiency.
Develop secure, resilient architecture spanning cloud and on-premises infrastructure using defense-in-depth and Zero Trust principles.
Troubleshoot complex network, firewall, cloud, and application-connectivity issues.
Support security incidents, production outages, and root-cause analysis.
Develop monitoring, logging, alerting, dashboards, runbooks, and engineering standards.
Perform performance tuning, capacity planning, and security infrastructure lifecycle management.
Participate in on-call or escalation support as required.

Benefits

Medical plan options, some with Health Savings Accounts.
Dental plan options.
Vision plan.
401(k) plan with pre-tax and post-tax contribution options and a company match.
Full flex work weeks where possible.
Paid time off plans, including vacation, sick and personal time, holidays, and paid parental, military, bereavement, and jury duty leave.
Short- and long-term disability benefits.
Life insurance.
Accidental death and dismemberment coverage.
Personal accident, critical illness, and business travel and accident insurance.