RCT is seeking a Senior Systems Administrator to support a large, cloud-native, mission-critical program focused on Entitlement, IdAM/ICAM, and digital identity services. The role supports a 200+ FTE development environment and works closely with developers, engineers, and security teams to design, implement, and maintain secure AWS-based infrastructure. Key Responsibilities
Design, implement, and maintain cloud-native services in AWS
Provide technical leadership and hands-on engineering support to mission teams
Support 24/7 mission-critical systems with a rotating on-call schedule (1 week every ~2 months)
Perform Linux system administration, security patching, and AWS server support
Support a COTS LDAP-based service used by hundreds of sponsor systems
Ensure high availability, security, and compliance of enterprise systems
Work within Agile/Scrum teams and DevOps CI/CD pipelines
Produce strong technical documentation and design guidance
Required Qualifications
BS + 6–10 years of experience
Expert Linux system administration (Bash/CLI)
Strong AWS and cloud infrastructure-as-code experience
Agile experience and cross-functional team collaboration
Ability to support privileged access and on-call rotation
TS/SCI with Polygraph
Desired Qualifications
LDAP experience
AWS Associate-level certification
3+ years of C2S experience
CloudFormation, Tomcat, NGINX
IAM / IdAM / ICAM, authentication & authorization systems
Containerization, Ansible, JavaScript, SQL
RCT Systems offers:
Competitive benefits package (medical, dental, vision, life insurance)
Immediate 401k vesting
Generous PTO and flexible schedules
$500.00 annual technology allowance
RCT Systems is committed and proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, sex (to include pregnancy and related conditions, sexual orientation, and gender identity), national origin, disability, veteran status, or any other federally protected class.