Linux System Administrator (TS/SCI CI Poly)

Seamless Migration•Chantilly, VA

8h•Onsite

About The Position

Seamless Migration is seeking a career and customer-oriented Linux Systems Administrator to join our team in Chantilly, VA Support Government infrastructure by architecting and maintaining secure Linux-based systems in AWS Commercial Cloud Services (C2S) environments Work on business-essential enterprise applications while advancing cloud and automation skills Design, deploy, and maintain Linux servers (Amazon Linux 2, Amazon Linux 2023) in AWS C2S environments Build automation scripts (Bash, Python, PowerShell) to streamline provisioning, configuration management, and system maintenance Implement Infrastructure as Code practices for repeatable, scalable deployments Ensure high availability and performance of production applications through proactive monitoring (CloudWatch) and system health metrics Execute application and database migrations with minimal downtime Deploy security patches (IAVA), updates, and maintain compliance with security baselines Collaborate with Information System Security Engineers (ISSE) to maintain security accreditation under ICD 503 Document security controls, create system security plans, and support Authority to Operate (ATO) processes Maintain configuration management aligned with contract and customer requirements Create clear technical documentation including architecture diagrams, SOPs, runbooks, and system documentation Troubleshoot complex issues across hardware, software, networking, and cloud services Support development, testing, and production environments including web servers and databases (MySQL, SQL Server), as well as DevOps tools Work within a productive and collaborative team environment with well-defined objectives, clear communication, and mutual respect

Requirements

Security+ Certification (IAT Level 2 or higher)
3+ years of Linux system administration experience (Red Hat, CentOS, Ubuntu, or Amazon Linux)
Hands-on AWS experience, specifically in C2S environments
Experience with Microsoft ecosystem technologies including Active Directory, Windows Server, IIS, and SQL Server
MySQL database administration experience
Strong organizational skills with the ability to prioritize competing demands independently

Nice To Haves

AWS Certified Solutions Architect – Associate
AWS Certified SysOps Administrator
Red Hat Certified System Administrator (RHCSA)
Experience with AWS services, including Auto Scaling, ELB, CloudWatch, Lambda, ECS, EC2, VPC, S3, and IAM
Proficiency in scripting languages including Python, Bash, PowerShell, and JSON
Experience with configuration management tools such as Ansible, Terraform, and CloudFormation
Experience with containerization technologies including Docker, Kubernetes, and ECS
Experience with CI/CD pipelines including Jenkins, GitLab CI, and Team Foundation Server
Experience with version control using Git
Familiarity with the ICD 503 framework
Experience with STIG implementation and security scanning tools

Responsibilities

architecting and maintaining secure Linux-based systems in AWS Commercial Cloud Services (C2S) environments
Design, deploy, and maintain Linux servers (Amazon Linux 2, Amazon Linux 2023) in AWS C2S environments
Build automation scripts (Bash, Python, PowerShell) to streamline provisioning, configuration management, and system maintenance
Implement Infrastructure as Code practices for repeatable, scalable deployments
Ensure high availability and performance of production applications through proactive monitoring (CloudWatch) and system health metrics
Execute application and database migrations with minimal downtime
Deploy security patches (IAVA), updates, and maintain compliance with security baselines
Collaborate with Information System Security Engineers (ISSE) to maintain security accreditation under ICD 503
Document security controls, create system security plans, and support Authority to Operate (ATO) processes
Maintain configuration management aligned with contract and customer requirements
Create clear technical documentation including architecture diagrams, SOPs, runbooks, and system documentation
Troubleshoot complex issues across hardware, software, networking, and cloud services
Support development, testing, and production environments including web servers and databases (MySQL, SQL Server), as well as DevOps tools