Senior Security Engineer – System Architect
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Job Description
Senior Security Engineer & System Architect designing and maintaining secure IT infrastructures for government services. Leading technical efforts in system hardening, risk assessments, and team mentorship.
Responsibilities:
- The Senior Security Engineer & System Architect designs, builds, and maintains secure, resilient IT infrastructures.
- This role serves as a technical leader translating business and mission needs into secure solutions, integrating security best practices across the full system development lifecycle.
- Responsibilities include system and network hardening, cloud and firewall security, risk assessments, incident response, and mentoring technical teams.
- Senior Linux Administrator Administer Linux systems in enterprise and production environments (RHEL required).
- Manage core OS services including disk management, DNS, networking, and package management.
- Automate administration using Bash, Python, Perl, and configuration management tools such as Ansible, Puppet, or Chef.
- Implement CIS hardening, patching, vulnerability remediation, and STIG/RMF compliance.
- Standardize Linux server templates and support migration efforts.
- Provide Tier 3 support and participate in a 24/7 on-call rotation.
- Mentor junior administrators and collaborate with cross-functional teams on new deployments.
- Senior Network Administrator Deploy, configure, and manage Citrix ADC (NetScaler) for load balancing, SSL offloading, and high availability.
- Manage Public Key Infrastructure (PKI) and certificate lifecycle.
- Configure virtual servers, services, and traffic flows to ensure performance and security.
- Create and maintain SOPs, MOPs, architecture diagrams, and knowledge articles.
- Lead troubleshooting and crisis response for complex network and application issues.
- Develop automation using Python or NetScaler Console (ADM).
Requirements:
- Bachelor’s degree in Computer Science or a related field.
- 5–8 years of Linux administration experience.
- 5–8 years of network engineering experience, including at least 5 years with Citrix NetScaler.
- 5–8 years of Citrix ADC (NetScaler) experience.
- Protocol experience including TCP/IP, BGP, OSPF, and SSL.
- Experience with AWS or Azure networking is a plus.
- Strong analytical, problem-solving, communication, and multi-tasking skills.
- Analyze technical needs, requirements, system designs, integrations, and operational impacts.
- Recommend and implement approved cost-cutting technologies and methods to improve efficiency and reduce PB-ITS costs.
- Lead teams and collaborate with infrastructure engineers to develop detailed designs and quality controls.
- Support implementation, tuning, optimization, maintenance, and enhancement of applications and integrations.
- Coordinate with GSA teams to ensure technical components align with Government requirements, including GSA IT CIO-IT Security-19-95.
- Plan PB-ITS system architectures, including long-term upgrades, redesigns, migrations, and modernization efforts.
- Create and maintain system designs, baselines, and implementation documentation.
- Coordinate with GSA IT teams to ensure that virtualization, backups, networking, authentication, authorization, and security functions operate optimally.
- Ensure compliance with IPv6 requirements as outlined in OMB M-21-07 and GSA IT policy.
Benefits:
- For information on SFI's benefits, please visit http://www.spatialfront.com/pages/career.html
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