Systems Engineer (TS/SCI with Poly Required)

GCI; Warrenton, Tysons (VA, VA); On-site; USD 142,792 - 238,451; Full time

Job summary

GCI is seeking a hands-on Systems Engineer (TS/SCI with Poly Required) to operate on-site in Warrenton, Virginia. The role requires a senior technical leader who can own end-to-end system reliability, performance, and security across cloud and on-prem environments.

Responsibilities include documenting current architectures, designing future-state solutions, and driving modernization initiatives while collaborating with infrastructure, platform, DevSecOps, and data teams.

Qualifications

• Bachelor’s Degree in Computer Science or related technical discipline or equivalent experience.
• Minimum ten (10) years of related systems engineering experience.

Responsibilities

• Perform hands-on systems engineering across network, compute, storage, OS, middleware, databases, and applications.
• Analyze and document as-is infrastructure, platform, and application architectures.
• Lead and execute cloud and on-prem system implementations, migrations, and upgrades.
• Ensure systems meet availability, scalability, performance, security, and compliance requirements.
• Collaborate with software engineers, data scientists, and data analysts; produce runbooks and diagrams.

Skills

Enterprise networking

Linux administration

PKI authentication

Cloud platforms

CI/CD

Security hardening

Observability

Education

Bachelor’s Degree in Computer Science

Tools

Terraform

Ansible

Jenkins

GitHub Actions

CloudFormation

Job description

Systems Engineer (TS/SCI with Poly Required)

Job Category: IT Infrastructure and Operations

Requisition Number: SYSTE002232

• Posted : July 28, 2026
• Full-Time
• On-site
• Salary Range : $142,792 USD to $238,451.20 USD

GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.

At GCI, we solve the hard problems. As a Systems Engineer , a typical day will include the following duties:

JOB DESCRIPTION

We are seeking a hands-on Systems Engineer (SME) with deep expertise across infrastructure, platforms, and application ecosystems spanning cloud and on-premises environments. This role requires a proven practitioner who can analyze existing ("as is") systems and applications, document current state architectures, design future-state solutions, and implement systems enhancements or technology transformations end-to-end.

The ideal candidate is a technical leader and doer, not just an advisor - someone who can seamlessly collaborate across infrastructure, platform, application, DevSecOps, information systems security, and data teams while maintaining ownership of system reliability, performance, scalability, and security.

QUALIFICATIONS

• Bachelor’s Degree in Computer Science or related technical discipline, or other related technical discipline, or equivalent combination of education, technical certifications, training, and work/military experience
• Minimum ten (10) years of related systems engineering experience

REQUIRED KNOWLEDGE/SKILLS

Candidates must demonstrate hands-on experience in all the following areas:

Infrastructure & Platforms

• Enterprise networking (e.g., routing, switching, firewalls, load balancers, DNS)
• Storage technologies (e.g., SAN, NAS, object storage)
• Linux (Redhat, CentOS) operating systems (administration, hardening, automation)
• IdAM - Public Key Infrastructure (PKI) hands-on for AuthN and AuthZ

Cloud & On-Prem Technologies

• Cloud platforms (AWS, Azure, and/or GCP)
• Hybrid and on-prem infrastructure design and integration
• Cloud networking, identity, security, and cost optimization

Data & Application Platforms

• Relational and NoSQL databases - relational (e.g., Oracle, PostgreSQL, MySQL, SQL Server) and NoSQL (e.g., MongoDB, Cassandra, DynamoDB, Redis) databases
• Web services, APIs, and middleware
• Event-based messaging systems (e.g., SQS, SNS, RabbitMQ)
• Infrastructure as Code - Scripting & Automation: Python, Bash, PowerShell, Terraform, Ansible, or CloudFormation
• Configuration management and scripting (e.g., PowerShell, Bash, Python, etc.)
• CI/CD integration with infrastructure and platforms (e.g., Jenkins, GitLab CI/CD, GitHub Actions, GitOps, ArgoCD)
• Security best practices and systems hardening
• Monitoring & Incident Response: Proficiency with tools like Prometheus, Grafana, Splunk, ELK Stack, CloudWatch
• Ability to create:
• To-be architecture and detailed engineering designs
• Implementation and migration plans

DESIRED SKILLS

• Observability and monitoring tools (e.g., logging, metrics, tracing)
• Zero Trust and modern security architectures
• Data analytics, AI/ML platform exposure
• Experience supporting production or mission-critical environments
• Relevant certifications (e.g., cloud, systems, security, or architecture)
• Knowledge of machine learning platforms (e.g., TensorFlow, PyTorch, SageMaker)
• Familiarity with big data ecosystems (e.g., Hadoop, Databricks, Snowflake, Google BigQuery)
• Strong background in ITIL processes and agile methodologies

KEY RESPONSIBILITIES

• Perform hands-on systems engineering across network, compute, storage, operating systems, middleware, databases, and applications
• Analyze and document as-is infrastructure, platform, and application architectures
• Work with the System Architect and Cloud Architect to create the detail engineering designs for modernization, optimization, and transformation initiatives
• Lead and execute cloud and on-prem system implementations, migrations, and upgrades
• Ensure systems meet availability, scalability, performance, security, and compliance requirements
• Integrate infrastructure and platforms with DevOps and DevSecOps pipelinesTroubleshoot complex, cross-stack issues spanning infrastructure, platforms, and applications
• Collaborate effectively with:
• Software Engineers
• Data Modelers, Data Scientists, and Data Analysts
• Produce clear technical documentation, diagrams, standards, and runbooks
• Serve as a technical authority and escalation point for complex system issues
• Communication Skills:
• Ability to brief executives clearly and translate technical issues into business impact
• Ability to work across organizations (internal and IC) to implement complex solutions

IDEAL CANDIDATE PROFILE

• Recognized SME with deep, hands-on technical expertise
• Strong systems thinker with the ability to see and engineer across the full stack
• Comfortable operating at both strategic architecture and tactical implementation levels
• Excellent communication and collaboration skills across technical and non-technical teams
• Proven ability to own complex systems from design through production

*A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Preferred

Bachelor of Science or better in Computer Science or related field.

10 years:

Demonstrated related systems engineering experience.

Licenses & Certifications

Equal Opportunity Employer
This employer is required to notify all applicants of their rights pursuant to federal employment laws.For further information, please review the Know Your Rights notice from the Department of Labor.