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Security Systems Engineer

St. Petersburg, Florida
Position: Security Systems Engineer
Job Title: Security Systems Engineer
Location: St. Petersburg, FL (Hybrid – Mix of In-Office and Remote Work)
Clearance Requirement: Active U.S. DoD Secret Clearance (or higher)
Position Overview:
We are seeking a Security Systems Engineer to support the design, implementation, and maintenance of secure enterprise network and system environments. The ideal candidate will have a strong foundation in networking, systems administration, and cybersecurity, with flexibility to support both Linux and Windows-based infrastructure. This position is based in St. Petersburg, Florida and offers a hybrid work schedule (part remote, part on-site).
Responsibilities:
  • Design, configure, and troubleshoot secure network infrastructures, including Cisco routers, switches, and firewalls.
  • Administer and support both Linux and Windows environments across enterprise infrastructure.
  • Implement and manage Active Directory services including GPOs, DNS, and domain authentication.
  • Deploy and maintain security platforms such as Forescout CounterACT.
  • Collaborate with cross-functional IT and cybersecurity teams to ensure system compliance and secure operations.
  • Participate in system hardening, patch management, and vulnerability remediation.
  • Document system configurations, network diagrams, and standard procedures.
Required Qualifications:
  • Active U.S. DoD Secret Clearance or higher (required).
  • Strong understanding of networking protocols and architecture (TCP/IP, VLANs, routing, switching).
  • Hands-on experience with Cisco IOS environments.
  • Experience with Microsoft Windows Server environments, including GPOs, DNS, and domain management.
  • Proficiency in Linux systems administration (preferably RHEL or CentOS).
Preferred Certifications (one or more):
  • Networking: CCNA, CCNP, or Palo Alto certifications (e.g., PCNSA, PCNSE)
  • Linux: RHCSA or CompTIA Linux+
Highly Desirable:
  • Experience with Forescout CounterACT.
  • Experience working in DoD or other federal IT environments, with familiarity in security compliance frameworks (e.g., RMF, STIGs).
Additional Desired Experience (Nice to Have):
  • Experience with VMware and virtualization technologies (e.g., vSphere, ESXi).
  • Familiarity with virtualization best practices in secure or regulated environments.
Work Environment & Benefits:
  • Flexible hybrid work environment (remote/onsite split) in St. Petersburg, FL
  • Competitive salary and full benefits package
  • Opportunity to work on high-impact projects in support of national defense and critical infrastructure
Why Join Cyber Defense Technologies?
At CDT, we offer a collaborative and inclusive work environment where your expertise in networking will help shape the future of cybersecurity and engineering solutions.

Compensation and Benefits:
  • Competitive salary based on experience.
  • Comprehensive benefits package, including health, dental, and retirement plans.
  • Opportunities for professional development and career advancement.
CDT is committed to hiring and retaining a diverse workforce. We are an Equal Opportunity employer making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class.

Apply Now:
If you are a proactive Security Systems Engineer and thrive in dynamic environments, we encourage you to apply and join the CDT team!

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