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Senior Security Network Engineer

Green Expert Technology Inc. (GreenXT)
Philadelphia, PA Full Time
POSTED ON 4/14/2026
AVAILABLE BEFORE 5/12/2026
Green Expert Technology Inc. (GreenXT) is seeking a Senior Security Network Engineer to support the Information Technology Operations Division of the Naval Surface Warfare Center, Philadelphia Division (NSWCPD).

The Information Technology Operations Division provides Information Technology (IT) services and long-term support for business system software development and development and sustainment of software applications for IT Service Management (ITSM).

About GreenXT

GreenXT is comprised of technical and business leaders. We hire intelligent, hardworking, and dedicated people who not only possess the desire to learn and improve their skills but want to contribute to the design and development of innovative solutions that address the Navy’s greatest technological challenges. We hired each of our employees because we believe they are exceptional, have the ability to excel at their job, and will contribute positively to GreenXT.

GreenXT’s business office strives to be the most efficient and effective business office supporting our customers. Our personnel aspire to become leaders through organized, rigorous, and diligent efforts. GreenXT employees are always looking to help one another succeed. We look out for each other and cross-train so that the product we deliver is one that we’re confident in and proud of. We strongly believe in growth and providing our workforce with career development opportunities to help everyone achieve their goals.

We take pride in our support of the United States Navy. We never forget that the work we do is ultimately in support of America’s warfighter and serving those who serve. The idea that our hard work can help make their jobs easier, assist them to defend our nation, and can help ensure they return home safely to their loved ones motivates us every day, and we hope that you join us on that mission!

Responsibilities:

  • Routing and switching for Cisco platforms
  • Perform security hardening of Cisco Catalyst switches in accordance with STIG requirements
  • Develop DNA center templates to automate the application and validation of STIGs across the enterprise.
  • Automating STIG and real-time security posture processes
  • Conduct regular vulnerability assessments and remediation to ensure continuous compliance
  • Perform lifecycle maintenance of devices
  • Manage configuration and deployment
  • Troubleshooting


Requirements:

  • Bachelor’s degree in Information Technology, Computer Science, or an equivalent technical degree from an accredited college or university.
  • Active DoD Secret Level Security Clearance (or the ability to obtain this clearance upon position acceptance) is required for this position
  • Eight (8) years’ experience in network security (CCNP-Routing or CCNP Security), demonstrating strong experience with C2C, Cisco Prime Infrastructure, IEEE 802.11, TCP/IP (specifically Layers 3/4), switching and routing protocols (internet standards and general architecture), and Cisco hardware.
  • Experience with any of the following is a plus: Cisco ACI, APIC, Catalyst Center/DNA, FTD, ISE, RSA Server, and DISA STIGs.
  • Minimum Certification Requirement: IAT Level 3; Baseline (any one of: CASP /Sec X, CCNP Security, CISA, CISSP (or Associate), GCED, GCIH) and OS specific: CCNP level certifications.


Job Benefits

  • Competitive Pay
  • 11 Holidays
  • Paid Vacation
  • 401(k) with Matching
  • Medical and Dental insurance
  • Life and Disability Insurance

Salary.com Estimation for Senior Security Network Engineer in Philadelphia, PA
$106,113 to $124,998
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