Site Reliability Engineer (SRE) - Arlington, VA

Serco; Falls Church (VA); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Paid vacation and sick leave

401(k) with employer matching

Tuition reimbursement

Life and disability insurance

Parental leave benefits

Employee Assistance Plan

Job summary

Serco Inc. is seeking a Site Reliability Engineer to improve reliability, security, and performance of AWS-hosted apps and infrastructure.

You will work with development, cloud, security, and operations teams to automate deployments, manage containerized workloads, and strengthen CI/CD pipelines. Successful candidates will have active security clearance, AWS experience, and RHEL expertise, with ability to work on-site at the Pentagon, Arlington, VA up to 80% in a hybrid schedule.

Qualifications

• Active interim or Secret security clearance.
• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related technical field.
• 5 years of experience in systems administration, cloud engineering, DevOps, SRE, or a related technical role.
• Active CompTIA Security+ certification.
• Hands-on experience working with AWS services and cloud infrastructure.
• Experience administering Linux, preferably Red Hat Enterprise Linux (RHEL).
• Experience with Docker container technologies.
• Previous experience supporting or working with a container orchestration platform, such as Kubernetes, Amazon EKS, or Amazon ECS.
• Experience building and managing container images and container registries.
• Experience developing, maintaining, or troubleshooting CI/CD pipelines.
• Working knowledge of Git and source-code management practices.
• Experience with scripting or automation using Python, Bash, and/or similar technologies.
• Understanding of networking fundamentals, including TCP/IP, DNS, HTTP/HTTPS, load balancing, routing, and firewalls/security groups.
• Experience troubleshooting complex technical issues across applications, operating systems, networks, and infrastructure.
• Ability to work collaboratively with development, infrastructure, cybersecurity, and operations teams.
• Ability to travel up to 10%.

Responsibilities

• Maintain and improve the reliability, availability, performance, and security of AWS-hosted applications and infrastructure.
• Support containerized applications using Docker, Kubernetes, ECS, and EKS.
• Administer and troubleshoot RHEL servers and services.
• Develop, maintain, and troubleshoot CI/CD pipelines for build, test, scan, and deploy.
• Support container orchestration platforms and automated deployments.
• Automate infrastructure provisioning, configuration, deployment, and tasks.
• Implement and maintain monitoring, logging, alerting, and observability.
• Troubleshoot issues across applications, OS, networks, and AWS infra.
• Participate in incident response, root-cause analysis, and corrective actions.
• Identify repetitive tasks and develop automation to reduce manual effort and risk.
• Work with security teams to integrate security controls into CI/CD pipelines.
• Develop and maintain operational runbooks and SOPs.
• Support system patching, vulnerability remediation, and security hardening.

Job description

We are seeking a Site Reliability Engineer (SRE) to support and improve the reliability, availability, security, and performance of applications and infrastructure hosted within an Amazon Web Services (AWS) cloud environment. The SRE will work closely with application development, cloud infrastructure, cybersecurity, and operations teams to automate deployments, maintain containerized workloads, support Red Hat Enterprise Linux (RHEL) systems, and improve CI/CD pipelines and orchestration capabilities. This position offers the ability to work a hybrid remote schedule with the requirement to perform on-site support at the Pentagon, Arlington, VA up to 80%.

In This Role, You Will

• Maintain and improve the reliability, availability, performance, and security of AWS-hosted applications and infrastructure.
• Support containerized applications using technologies such as Docker, Kubernetes, Amazon ECS, and Amazon EKS.
• Administer and troubleshoot Red Hat Enterprise Linux (RHEL) servers and associated services.
• Develop, maintain, and troubleshoot CI/CD pipelines used to build, test, scan, and deploy applications and infrastructure.
• Support container orchestration platforms and automated application deployments.
• Automate infrastructure provisioning, configuration, deployment, and operational tasks.
• Implement and maintain monitoring, logging, alerting, and observability solutions.
• Troubleshoot application, container, operating system, networking, and AWS infrastructure issues.
• Participate in incident response, root-cause analysis, and corrective-action activities.
• Identify repetitive operational tasks and develop automation to reduce manual effort and operational risk.
• Work with development and security teams to integrate security controls and automated security testing into CI/CD pipelines.
• Develop and maintain operational documentation, runbooks, and standard operating procedures.
• Support system patching, vulnerability remediation, configuration management, and security-hardening activities.

To Be Successful In This Role, You Must Have

• An active interim or Secret security clearance.
• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related technical field.
• 5 years of experience in systems administration, cloud engineering, DevOps, SRE, or a related technical role.
• An active CompTIA Security+ certification.
• Hands‑on experience working with AWS services and cloud infrastructure.
• Experience administering Linux, preferably Red Hat Enterprise Linux (RHEL).
• Experience with Docker container technologies.
• Previous experience supporting or working with a container orchestration platform, such as Kubernetes, Amazon EKS, or Amazon ECS.
• Experience building and managing container images and container registries.
• Experience developing, maintaining, or troubleshooting CI/CD pipelines.
• Working knowledge of Git and source‑code management practices.
• Experience with scripting or automation using Python, Bash, and/or similar technologies.
• Understanding of networking fundamentals, including TCP/IP, DNS, HTTP/HTTPS, load balancing, routing, and firewalls/security groups.
• Experience troubleshooting complex technical issues across applications, operating systems, networks, and infrastructure.
• Ability to work collaboratively with development, infrastructure, cybersecurity, and operations teams.
• Ability to travel up to 10%.

Additional Desired Qualifications

• Strong experience with AWS services such as EC2, VPC, IAM, S3, CloudWatch, CloudTrail, Route 53, Elastic Load Balancing, ECR, ECS, and EKS.
• Knowledge of PKI Certificate based authentication / Single Sign-On.
• Strong experience with Kubernetes administration and troubleshooting.
• Experience with GitLab CI/CD, Jenkins, AWS CodePipeline, or similar CI/CD platforms.
• Experience with Infrastructure as Code using Terraform, AWS CloudFormation, or AWS CDK.
• Experience implementing observability solutions using technologies such as CloudWatch.
• Experience performing root‑cause analysis and developing corrective actions following production incidents.
• Knowledge of AWS security best practices, IAM policies and roles, encryption, secrets management, vulnerability management, and least‑privilege principles.
• Experience with DevSecOps practices, including automated vulnerability scanning, container scanning, static code analysis, and security gates within CI/CD pipelines.
• Experience supporting systems subject to DISA STIGs, NIST controls, RMF, or other federal cybersecurity requirements.
• AWS certification such as AWS Certified Solutions Architect, SysOps Administrator, or DevOps Engineer.
• Red Hat, Kubernetes, or related industry certifications.

Company Overview

Serco Inc. (Serco) is the Americas division of Serco Group, plc. In North America, Serco’s 9,000+ employees strive to make an impact every day across 100+ sites in the areas of Defense, Citizen Services, and Transportation. We help our clients deliver vital services more efficiently while increasing the satisfaction of their end customers. Serco serves every branch of the U.S. military, numerous U.S. Federal civilian agencies, the Intelligence Community, the Canadian government, state, provincial and local governments, and commercial clients. While your place may look a little different depending on your role, we know you will find yours here. Wherever you work and whatever you do, we invite you to discover your place in our world. Serco is a place you can count on and where you can make an impact because every contribution matters.

Serco does not accept unsolicited resumes through or from search firms or staffing agencies without being a contracted approved vendor. All unsolicited resumes will be considered the property of Serco and will not be obligated to pay a placement or contract fee. If you are interested in becoming an approved vendor at Serco, please email [e-mail].

Serco is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics.

Salary range: The range for this position can be found at the top of this posting. This range is provided as a general guideline and represents a good faith estimate across all experience levels. Actual base salary will be determined by a variety of factors, including but not limited to, the scope of the role, relevant experience, job-related knowledge, education and training, key skills, and geographic market considerations. For roles available in multiple states, the range may vary to reflect differences in local labor markets. In addition to base salary, eligible positions may include other forms of compensation such as annual bonuses or long-term incentive opportunities.

• Medical, dental, and vision insurance
• Robust vacation and sick leave benefits, and flexible work arrangements where permitted by role or contract
• 401(k) plan that includes employer matching funds
• Tuition reimbursement program
• Life insurance and disability coverage
• Optional coverages that can be purchased, including pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Employee Assistance Plan

To review all Serco benefits please visit: https://careers.serco-na.com/us/en/about-us.

Serco complies with all applicable state and local leave laws, including providing time off under the Colorado Healthy Families and Workplaces Act for eligible Colorado residents, in alignment with our policies and benefit plans.