Leidos · 1 day ago
Senior Collaboration Engineer
United States
Full-time
Remote
Senior Level, Lead/Staff
$92K/yr - $167K/yr
8+ years expLeidos is a leading technology company that is currently seeking a Senior Collaboration Engineer to manage and maintain their Red Hat Enterprise Linux servers and M365 collaboration services. This role involves supporting and enhancing mail flow environments at NASA, ensuring high availability and security of email services, and utilizing automation to improve processes.
ComputerGovernmentInformation ServicesInformation TechnologyNational SecuritySoftware
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Implement and monitor SPF, DKIM, and DMARC policies
Troubleshoot email delivery issues and enforce anti-spoofing measures
Full lifecycle management of our Red Hat servers, including installation, configuration and patching in production and test environments
Perform security patching, upgrades, and hardening to meet compliance standards and remediate critical vulnerabilities
Configure and maintain Postfix SMTP servers for enterprise email flow
Integrate email services with DNS, LDAP, and TLS for secure delivery
Knowledge of load balancers and DNS for email services
Support failover and disaster recovery strategies
Use tools like Grafana, Nagios, Zabbix, or similar for system and service monitoring
Analyze logs and resolve complex SMTP and network issues
Automate routine tasks using Bash, Python, PowerShell, and configuration management tools (Ansible, Puppet)
Maintain accurate documentation of configurations and processes
Deliver, support, and enhance M365 services in Exchange Online, Exchange Online Protection, retention policies, litigation holds, etc
Introduce new and modify existing M365 mail flow features and services across NASA and support customer issues
Qualification
Required
Must be a US citizen to apply
Must be able to obtain a Public Trust or currently possess a security clearance to be considered
Bachelor's degree in Computer Science, Information Technology, or equivalent experience
8-12 years of relevant experience
Experience with SMTP management including configuration, security, and troubleshooting
Hands-on experience in command-line Linux system administration
Advanced proficiency in Red Hat Enterprise Linux (RHEL 8/9) Bash administration
Advanced proficiency in Hybrid Exchange and the M365 collaboration stack
Expertise in Postfix SMTP configuration, troubleshooting, and mailflow
Expertise in SPF, DKIM, DMARC implementation, troubleshooting, and monitoring
Familiarity with load balancers (NGINX, HAProxy) and reverse proxy setups
Solid understanding of DNS, TCP/IP, LDAP, and secure email transport (TLS/SSL)
Scripting skills in Bash or Python and PowerShell
Experience with automation tools (Ansible, Puppet)
Knowledge of system monitoring tools and performance tuning
Preferred
Red Hat certifications (RHCSA, RHCE) strongly preferred
Company
Leidos
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health.
10001+ employees
Funding
Current Stage
Public CompanyTotal Funding
unknown2025-02-20Post Ipo Debt
2013-09-17IPO
Leadership Team
James Carlini
Chief Technology Officer
Theodore Tanner
Chief Technology Officer
Recent News
MarketScreener
2025-12-16
2025-12-16
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