Appcast

Technical Subject Matter Expert - TS/SCI Poly

Appcast$112K — $196K *
Aerospace & Defense
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science, IT, Cybersecurity, Engineering, or related field; equivalent experience may be accepted
  • Minimum 7+ years in network engineering, systems administration, or cyber infrastructure
  • Experience in virtual infrastructure, cloud platforms, and secure remote access solutions
  • Strong knowledge of TCP/IP networking, DNS, VPNs, firewalls, and NAT principles
  • Familiarity with Linux and/or Windows systems in enterprise settings
  • Ability to troubleshoot technical issues in distributed environments
  • Strong written and verbal communication skills

Responsibilities

  • Design, build, and maintain infrastructure for authorized virtual operations
  • Deploy and sustain virtual private servers and secure remote access solutions
  • Support network configurations including VPNs and traffic routing
  • Ensure systems comply with cybersecurity controls and government policies
  • Perform system health checks and lifecycle maintenance
  • Diagnose and resolve network and service delivery issues
  • Create and maintain technical documentation and standard operating procedures

Benefits

  • Comprehensive medical, dental, and vision coverage
  • Generous paid time off and flexible work schedules
  • 401(k) retirement plan
  • Life insurance and additional financial benefits
  • Holidays to support work-life balance
Full Job Description
Job Description:

The Technical Subject Matter Expert provides technical support for government-directed virtual operations requiring secure, scalable, and policy-compliant infrastructure. This role supports the design, configuration, deployment, monitoring, and sustainment of capabilities used to enable global virtual access, operational resilience, and infrastructure abstraction in accordance with applicable law, policy, and contractual requirements.

The ideal candidate has experience with secure network architecture, proxy and relay infrastructure, virtualized environments, cloud-hosted services, traffic management, identity separation measures, and operational support in controlled government environments. This role works closely with engineers, analysts, operators, cybersecurity personnel, and program leadership.

What You'll Be Doing:
  • Design, build, configure, and maintain infrastructure supporting authorized virtual operations
  • Deploy and sustain virtual private servers, remote access nodes, proxy layers, routing solutions, and segmented environments
  • Support network configurations including VPNs, gateways, DNS management, traffic routing, and secure remote connectivity
  • Ensure systems operate in accordance with cybersecurity controls, government policies, contract requirements, and operational approval frameworks
  • Perform system health checks, logging review, performance tuning, patching, and lifecycle maintenance
  • Diagnose and resolve network, infrastructure, access, latency, and service delivery issues across distributed environments
  • Create and maintain technical documentation, standard operating procedures, architecture diagrams, and configuration baselines
  • Coordinate with cross-functional teams including program managers, cyber defenders, system administrators, and mission stakeholders
  • Identify technical risks, infrastructure weaknesses, and operational constraints; recommend mitigations
  • Provide technical guidance and user support for approved personnel leveraging services


What Required Skills You'll Bring:
  • Bachelor's degree in Computer Science, Information Technology, Cybersecurity, Engineering, or related field; equivalent experience may be substituted
  • Minimum 7+ years of relevant technical experience in network engineering, systems administration, cyber infrastructure.
  • Experience with virtual infrastructure, cloud platforms, proxy technologies, secure routing, and remote access solutions
  • Knowledge of TCP/IP networking, DNS, VPNs, firewalls, NAT, and segmentation principles
  • Experience administering Linux and/or Windows systems in enterprise or mission environments
  • Familiarity with logging, monitoring, configuration management, and infrastructure hardening
  • Ability to troubleshoot distributed technical environments and maintain service availability
  • Experience working in classified, regulated, or government-controlled operational settings preferred
  • Strong written and verbal communication skills
  • Ability to work independently and within a team under mission-driven timelines


What Desired Skills You'll Bring:
  • Experience supporting infrastructure abstraction or identity-separated technical environments for government customers
  • Familiarity with virtualization technologies such as VMware, KVM, VirtualBox, or containerized services
  • Experience with commercial cloud and hosting providers in secure, compliant architectures
  • Knowledge of scripting or automation using Bash, PowerShell, Python, or similar languages
  • Understanding of operational security, auditing, access control, and multi-layered technical risk reduction
  • Relevant certifications such as Security+, Network+, CySA+, CEH, CISSP, CCNA, or comparable credentials
  • Prior experience supporting federal, defense, intelligence, or law enforcement contracts


Security Clearance Requirement:
An active Top Secret SCI w/Polygraph security clearance is required for this position.

This position is part of our Federal Solutions team.

Salary Range: $112,200.00 - $196,400.00

We value our employees and want our employees to take care of their overall wellbeing, which is why we offer best-in-class benefits such as medical, dental, vision, paid time off, 401(k), life insurance, flexible work schedules, and holidays to fit your busy lifestyle!

About Appcast

Appcast is a global leader in programmatic recruitment advertising technology. More than just a job board, Appcast?s programmatic recruitment advertising exchange connects employers and job seekers through real-time bidding and automatic job ad optimization. Appcast?s proprietary technology and advanced data analysis tools enable employers to source and hire top talent quickly, efficiently, and cost-effectively. Appcast is headquartered in Lebanon, New Hampshire, with offices in Boston, New York City, San Francisco, London, Manchester, and Budapest.
Learn more about Appcast
Size
200 employees
Industry
Founded
2014

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