Senior Collaboration Engineer

Senior Collaboration Engineer at Leidos summary:

Senior Collaboration Engineer to manage and maintain RHEL servers and Microsoft 365 collaboration and email services for NASA, including Postfix, Exchange (on-prem and Online), Teams, Defender, SMTP gateways, and email authentication (SPF/DKIM/DMARC). Responsibilities include Linux server lifecycle administration, email infrastructure configuration and security, load balancing/high availability, monitoring/troubleshooting, and automation with scripting and config management tools. Requires 8–12 years relevant experience, US citizenship, ability to obtain Public Trust/clearance, and strong skills in RHEL, Postfix, Exchange/M365, email security, and automation (Ansible/Puppet, Bash/Python/PowerShell).

Description

The NASA IT portfolio with Digital Modernization Sector currently has an opening for a Senior Collaboration Engineer to manage and maintain our Red Hat Enterprise Linux (RHEL) servers and M365 collaboration services as well as supporting enterprise email services.

This is a telework position, but the ideal candidate will reside within reasonable commute distance from a NASA operating center (Johnson Space Center (Houston, TX) or Marshall Space Flight Center (Huntsville, AL)).

This is an exciting opportunity to use your experience helping the NASA End-User Services and Technologies (NEST) mission. In this mission, we serve as an agile, trusted partner to transform, integrate, simplify, modernize, and safeguard NASA IT systems and data. And, above all else, continuously enhance the end-user experience.

The Senior Collaboration Engineer is responsible for supporting and enhancing the mail flow environment at NASA to include M365 and on-premises infrastructure. This infrastructure includes Red Hat Enterprise Linux-based Postfix servers, Exchange Server SE, Exchange Online, Microsoft Teams, Microsoft Defender and the M365 Security Suite, SMTP gateways, email authentication standards (SPF, DKIM, and DMARC), and ensuring high availability through multi-site load balancing and system hardening.

Having a strong technical background in these technologies will be key for the successful candidate. The ideal candidate will have deep technical expertise in Linux systems, email security, and automation. Must be able to clearly articulate technical dialog with a variety of audiences to include NEST and NASA management.

Key Responsibilities

• Email Security & Authentication:
  • Implement and monitor SPF, DKIM, and DMARC policies.
  • Troubleshoot email delivery issues and enforce anti-spoofing measures.
• Linux Server Administration:
  • 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
• Email Infrastructure Management:
  • Configure and maintain Postfix SMTP servers for enterprise email flow.
  • Integrate email services with DNS, LDAP, and TLS for secure delivery.
• Load Balancing & High Availability:
  • Knowledge of load balancers and DNS for email services.
  • Support failover and disaster recovery strategies.
• Monitoring & Troubleshooting:
  • Use tools like Grafana, Nagios, Zabbix, or similar for system and service monitoring.
  • Analyze logs and resolve complex SMTP and network issues.
• Automation & Scripting:
  • Automate routine tasks using Bash, Python, PowerShell, and configuration management tools (Ansible, Puppet).
  • Maintain accurate documentation of configurations and processes.
• Microsoft 365 Tenant Management:
  • 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

Required Technical Skills

• 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.

Qualifications

• 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
• Experience as service owner within an enterprise or GCC M365 environment
• Red Hat certifications (RHCSA, RHCE) strongly preferred.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit .

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at .

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected] .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission .

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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Keywords:

RHEL system administration, Microsoft 365, Postfix SMTP, email security SPF DKIM DMARC, Exchange Online/Hybrid Exchange, automation Ansible Puppet, Linux bash python scripting, load balancing high availability, monitoring Nagios Grafana Zabbix