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# Senior Systems Engineer

- **Company:** Intone Networks
- **Location:** Tysons, VA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Firewall, Systems Engineering, Cloud Computing, System Configuration, Email Management, Linux Servers, Virtualization Technology, IronPort, Firewall Services Module, Vmware
- **Published:** November 9, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-systems-engineer-tysons-corner-va--b0b8a536-cd52-493a-9433-11289ebb3c04

## About the Role

Systems Engineering, Email Security, Systems Engineering, IronPort Product/Service Family, Cloud Computing, Protective Services, Enterprise Protection, Firewall Administration, Email Management/Administration, Identify Issues, * Required

 * Expert-level experience designing, configuring, implementing, and maintaining Proofpoint as an enterprise email security service
 * Strong experience configuring Proofpoint firewall rules and maintaining email block lists
 * Deep understanding of Mail Transfer Agents (MTA) and Proofpoint Messaging Security Gateway
 * Hands-on experience with Proofpoint Messaging Security Gateway 8.x
 * Strong experience with Linux Server environments
 * Experience with VMware/virtualized environments
 * Strong understanding of email security architecture, mail flow, filtering, quarantine management, and enterprise messaging infrastructure
 * Preferred
 * Experience responding to requests to quarantine, release, and manage emails within Proofpoint

## Description

We are seeking a Senior Systems Engineer for a 12-month contract role based in Tysons Corner, Virginia. In this position, you will lead the migration from on-premises IronPort email security appliances to Proofpoint cloud-based email security, ensuring seamless transition with minimal disruption to email services.

Responsibilities

 * Lead migration from on-premises IronPort email security appliances to Proofpoint cloud-based email security
 * Design, configure, implement, and maintain Proofpoint as an enterprise email security service
 * Configure Proofpoint firewall rules and maintain email block lists
 * Respond to requests to quarantine, release, and manage emails within Proofpoint
 * Troubleshoot complex enterprise email security and messaging issues
 * Support enterprise messaging infrastructure and mail flow operations