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# Security Engineer

- **Company:** Radiant System, Inc
- **Location:** United States
- **Contract:** Permanent contract
- **Skills:** System Configuration, Linux Servers, Virtualization Technology, IronPort, Firewall Services Module, Vmware
- **Published:** August 14, 2026
- **Apply:** https://www.dice.com/job-detail/600deefb-5f68-405a-aa09-cf6580b7cf76

## About the Role

* Lead the migration from on-premises IronPort email security appliances to a Proofpoint cloud-based email security solution, ensuring a seamless transition with minimal disruption to email services.
 * Expert-level experience designing, configuring, and maintaining Proofpoint as an enterprise email security service.
 * Strong experience configuring Proofpoint firewall rules and maintaining block lists/allow lists.
 * Experience responding to requests to quarantine, release, or manage email messages.
 * Deep understanding of MTA (Mail Transfer Agent) concepts and Proofpoint Messaging Security Gateway (PSMG) 8.x.
 * Hands-on experience with Linux Server environments.
 * Experience working with VMware and virtualized infrastructure.
 * Strong troubleshooting and problem-solving skills in enterprise email security environments.
 * Ability to coordinate migration activities, resolve issues, and minimize impact to business email services.



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