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Senior System Engineer (Email Security)

Washington, DC, US • Posted 3 hours ago • Updated 2 hours ago

Contract W2

Contract Independent

12 Weeks

On-site

Depends on Experience

System One

Fitment

Dice Job Match Score™

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Job Details

Skills

Summary

Senior System Engineer (Email Security)
Washington, DC - 100% ONSITE
Compensation: W2 or C2C
Per Federal contract U.S. Citizenship Required
Security Clearance: Must be able to pass Federal background check
Application Deadline: 9/11/2026

Responsibilities:
•   Lead the migration from on-premises IronPort email security appliances to Proofpoint cloud-based email security solution, ensuring seamless transition with minimal disruption to email services.
•   Design, configure, and maintain Proofpoint as an enterprise service.
•   Set Proofpoint firewall rules and maintain block lists; respond to requests to quarantine or release email.
•   Deep understanding of MTA and Proofpoint Messaging Security Gateway and Proofpoint Messaging Security Gateway 8.x.
•   Work with Linux Server and VMWare environments to support migration efforts and ongoing system integrity.

Requirements:
•   Expert level experience designing, configuring, and maintaining Proofpoint as an enterprise service.
•   Experience in setting Proofpoint firewall rules and maintaining block lists; responding to requests to quarantine or release email.
•   Deep understanding of MTA and Proofpoint Messaging Security Gateway and Proofpoint Messaging Security Gateway 8.x.
•   Experience with Linux Server and VMWare environments.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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Ref: #851-Rockville-S1

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Dice Id: 10295162
Position Id: 378405
Posted 3 hours ago

Company Info

About System One

System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life sciences, and government sectors As an essential partner to private and public organizations of various needs and sizes, we offer our expertise to help them bring their most complex and mission-critical programs to fruition.

With our highly specialized services, in-demand technical skills, and vast operational expertise, we can deliver accelerated results that benefit our clients and the job seekers who partner with us. We staff contract, contract-to-hire, and direct-hire professionals across our network to work with our clients, some of whom are industry leaders and nationally branded organizations.

Our dedicated team of recruiters work tirelessly to match jobseekers with careers that align with their skills, aspirations, and goals.

We understand that finding the right job can be a transformative experience, and we are committed to supporting jobseekers throughout their career journeys. Our recruitment services are designed to connect individuals with fulfilling jobs that offer growth and development opportunities.

Whether you're an organization seeking customized workforce solutions, outsourced services, or if you're a jobseeker searching for your next opportunity,

System One is the perfect staffing partner for you.

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