Email Routing L3 Support Engineer - Linux

job summary:
We are hiring a Level 3 Email Routing Support Engineer to join our core Linux-based email infrastructure team. As senior members of our established team prepare for retirement, we are seeking a strong technical lead who can maintain operational continuity (BAU) for our legacy environment while helping drive modernizations for our messaging architecture.

This position is structured with a direct path toward FTE conversion, making it ideal for an experienced engineer seeking a long-term home.

PRIMARY RESPONSIBILITIES

L3 Incident Resolution & Support (BAU): Serve as the final escalation point for complex email delivery failures, mail flow deferrals, and routing misconfigurations.

MTA & Gateway Administration: Maintain and tune Proofpoint secure email gateways, alongside Sendmail and Postfix mail transfer agents running on Linux.

Legacy Application Support: Troubleshoot legacy Windows Server email routing configurations and application-generated mail flow to ensure seamless relaying to our Linux core.

Modernization & Automation: Identify opportunities to upgrade legacy Sendmail/Postfix rules, implement modern authentication standards (SPF, DKIM, DMARC), and automate queue monitoring via Bash, Python, or PowerShell.

Knowledge Transfer & Succession: Work closely with retiring senior engineers to document legacy system architectures, custom routing maps, and standard operating procedures.

 
location: Plano, Texas
job type: Solutions
salary: $56 - 66 per hour
work hours: 9am to 6pm
education: Bachelors

responsibilities:
Messaging Infrastructure Support

 Provide day-to-day operational support for enterprise email and collaboration infrastructure.

 Install, configure, maintain, and troubleshoot messaging applications and supporting

technologies.

 Ensure availability, reliability, and performance of messaging systems in accordance with

established SLAs.

 Support SMTP email processing, mail routing, delivery, and message hygiene services.

qualifications:

• Experience level: Experienced
• Minimum 5 years of experience
• Education: Bachelors (required)

skills:
Antivirus,Bash,configuration management,Anti-Spam,messaging technologies,messaging systems,Data Loss Prevention,Korn Shell,Linux/UNIX,Linux,log analysis,Malware,Windows,service monitoring,monitoring tools,monitoring and observability tools,Nagios,Operations System,Perl,Python,enterprise Linux,scripting,Shell scripting,SMTP,Splunk,system availability,UNIX,Windows Server,analytical,Excellent written and verbal communication,communicate effectively,organizational skills,committed,problem resolution,troubleshoot,Troubleshooting,problem-solving capabilities,reliability,proactively,Ability to work independently,proactive approach,Collaboration,24x7,System Administration,administration,Architecture,Install,automation,continuous improvement,business needs,Change Management,construction,corrective and preventive actions,Diagnose,email processing,email security,Engineering Support,incident management,Problem Management,incident response,ITIL processes,infrastructure,Infrastructure Support,infrastructure knowledge,hygiene,maintenance,system maintenance,optimization recommendations,operating systems,operational support,production support,root cause investigations,security,service improvement,enterprise collaboration,system design,resolve technical issues,testing,user requirements,Windows-based systems,Windows environments

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact View email address on us.fitly.work.




Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.