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IT Networking Systems Specialist

IT Networking Systems Specialist

XSITE LLCSan Diego, CA, US
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Job Description

Job Description

Position Title : IT Networking Systems Specialist (Mid-Level)

Location : Onsite – San Diego, CA

Security Clearance : Active TS / SCI required

Employment Type : Full-time

Start Date : Immediate hire preferred

About XSITE LLC

XSITE LLC is a mission-driven, veteran-friendly, and rapidly growing defense contractor committed to delivering innovative technology solutions across AI / ML, software development, systems engineering, and modeling & simulation. With a focus on empowering national defense, our team of dedicated professionals thrives in high-impact environments, solving complex challenges alongside military, government, and industry partners.

Position Overview

XSITE LLC is seeking a IT Networking Systems Specialist to provide subject matter expertise to a key government client in San Diego, CA. The ideal candidate will bring technical depth in networking technologies, especially Software Defined Networking, and possess the professionalism to engage with high-level stakeholders across the defense ecosystem. This role will directly support efforts to modernize and optimize wide area networks in tactically constrained environments.

Core Responsibilities

  • Provide technical support for the design, development, and implementation of modern WAN architectures in tactical environments.
  • Assist in the development and evaluation of network roadmaps to align with emerging mission needs and technology trends.
  • Apply knowledge of Software Defined Networking (SDN), overlay networks, and tactical afloat WANs to assess feasibility and performance tradeoffs.
  • Interface with stakeholders including Program Office personnel, Senior Executives, and Flag Officers to deliver recommendations and status updates.
  • Work onsite with client teams, ensuring clear communication and responsive support for evolving requirements.
  • Evaluate commercial and military satellite transport link integration within WAN designs.
  • Navigate disconnected, intermittent, and limited bandwidth (DDIL) environments and advise on best practices for reliable network performance.

Required Qualifications

  • Active TS / SCI Clearance (No exceptions).
  • Bachelor's degree in a relevant field (e.g., Engineering, Computer Science, Information Systems, Physics, Mathematics).
  • 5-10 years experience
  • Hands-on experience with :

    • Software Defined Networking (SDN) technologies.

  • WAN and overlay architectures in tactical or afloat military environments.
  • Network management tools and techniques.
  • Familiarity with DDIL constraints and tactical WAN best practices.
  • Strong analytical skills with the ability to independently troubleshoot complex network issues.
  • High level of adaptability and self-motivation in dynamic mission contexts.
  • Professionalism in interactions with government and military leadership.
  • Excellent verbal and written communication skills, including the ability to translate technical information across stakeholder levels.

    • Preferred Qualifications

  • Understanding of DoD, DoN, ASN, OPNAV, NAVWAR, PEO C4I, and Program Office structures.
  • Experience supporting R&D, S&T efforts, and system transitions into Programs of Record (PoRs).
  • Systems engineering experience within Department of Defense acquisition programs.
  • Systems engineering experience within Department of Defense acquisition programs.

    • Why Join XSITE?

    Best-in-Class Benefits & Work-Life Balance

  • 100% employer-paid health, dental, and vision coverage.
  • 401K with a 6% match
  • Industry-leading PTO package —because work-life balance matters.
  • Generous continuing education reimbursement to help you stay ahead.

    • Stability & Long-Term Growth

  • We hold multiple prime contracts and have a mentor-protégé joint venture with a large defense company , ensuring long-term contract stability while scaling our corporate infrastructure.

    • Career Growth Opportunities

  • XSITE LLC is a Service-Disabled Veteran-Owned Small Business that has grown nearly 300% in the past year . With that kind of trajectory, there are tons of opportunities for upward mobility, leadership, and cutting-edge technical work .

    • Apply now to contribute your expertise to a high-priority national defense initiative—and help shape the future of military network modernization.

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    System Specialist • San Diego, CA, US