Senior Site Reliability Engineer (SRE)

Serco; Annapolis (MD); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Serco Inc. is seeking a Senior Site Reliability Engineer to enhance reliability, availability, security, and performance of AWS-hosted applications and infrastructure.

The role partners with development, cloud infrastructure, cybersecurity, and operations teams to automate deployments and manage containerized workloads. The successful candidate will have a strong systems admin and cloud engineering foundation, focusing on automation-first approaches, monitoring, IaC, automated testing, and

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related technical field.
• 10 years of experience in systems administration, cloud engineering, DevOps, SRE, or a related technical role.
• Active interim or Secret security clearance.
• Active CompTIA Security+ certification.
• Hands-on experience with AWS services and cloud infrastructure.
• Experience with Linux (RHEL preferred).
• Experience with Docker container technologies.
• Experience with container orchestration (Kubernetes/EKS/ECS).
• Experience building/managing container images and registries.
• Experience developing or troubleshooting CI/CD pipelines.
• Git and source-code management knowledge.
• Scripting/automation with Python, Bash, etc.
• Networking fundamentals (TCP/IP, DNS, HTTP/HTTPS, load balancers, firewalls).
• Ability to travel 10%.

Responsibilities

• Serve as a senior technical authority for AWS cloud infrastructure, Linux platforms, containers, CI/CD, automation, and best practices.
• Architect, implement, and improve reliability, availability, performance, and security of AWS-hosted apps and infra.
• Design and support containerized applications using Docker, Kubernetes, ECS, and EKS.
• Administer and troubleshoot RHEL servers and services.
• Establish and implement Infrastructure as Code (IaC) and configuration-management standards.
• Develop and troubleshoot CI/CD pipelines for building, testing, scanning, and deploying apps and infra.
• Design and implement container orchestration platforms and automated deployments.
• Automate provisioning, configuration, deployment, and operational tasks.
• Implement and maintain monitoring, logging, alerting, and observability solutions.
• Lead troubleshooting of complex production issues across apps, containers, OS, networks, CI/CD, and AWS infrastructure.
• Participate in incident response, root-cause analysis, and corrective actions.
• Identify repetitive tasks and automate to reduce manual effort and risk.
• Work with development and security teams to integrate security controls and automated testing into CI/CD.
• Develop and maintain runbooks and standard operating procedures.
• Support patching, vulnerability remediation, configuration management, and security-hardening activities.

Skills

AWS cloud

Linux

Docker

Kubernetes

CI/CD

IaC

Automation

Python/Bash

Git

Networking

Security

Incident response

Collaboration

Travel

Education

Bachelor’s degree in CS/IT/Engineering

Tools

Docker

Kubernetes

Amazon ECS

Amazon EKS

Git

CI/CD tooling

Job description

Position Description & Qualifications

We are seeking a Senior 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.

The successful candidate thrives in a fast-paced, results-driven environment, has a strong systems administration and cloud engineering foundation with an automation-first mindset and an interest in improving system reliability through monitoring, infrastructure as code, automated testing, and repeatable deployment processes.

This position offers the ability to work a hybrid schedule with the requirement to perform on-site support at the Pentagon up to 80%.

In this role, you will:

• Serve as a senior technical authority for AWS cloud infrastructure, Linux platforms, containers, CI/CD, automation, and Operational and Engineering best practices.




• Architect, implement, maintain, and improve the reliability, availability, performance, and security of AWS-hosted applications and infrastructure.




• Design and 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.




• Establish and implement Infrastructure as Code (IaC) and configuration-management standards.




• Develop, maintain, and troubleshoot CI/CD pipelines used to build, test, scan, and deploy applications and infrastructure.




• Design and Implement container orchestration platforms and automated application deployments.




• -Automate infrastructure provisioning, configuration, deployment, and operational tasks.




• Implement and maintain monitoring, logging, alerting, and observability solutions.




• Lead troubleshooting of complex production issues spanning applications, containers, operating systems, networks, CI/CD pipelines, and AWS infrastructure.




• 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:

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related technical field




• 10 years of experience in systems administration, cloud engineering, DevOps, SRE, or a related technical role.




• An active interim or Secret security clearance.




• 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 10%.

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.

To review Serco benefits please visit: https://careers.serco-na.com/us/en/what-we-offer .

Candidates may be asked to present proof of identity during the selection process. If requested, this will require presentation of a government-issued I.D. (with photo) with name and address that match the information entered on the application. Serco will not take possession of or retain/store the information provided as proof of identity. For more information on how Serco uses your information, please see our Applicant Privacy Policy and Notice.

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.

Pay Transparency

Our Total Rewards package includes competitive pay, performance-based incentives, and benefits that promote well-being and work-life balance—so you can thrive both professionally and personally. Eligible employees also gain access to a wide range of benefits from comprehensive health coverage and health savings accounts to retirement plans, life and disability insurance, and time-off programs that support work-life balance. Program availability may vary based on factors such as contract type, location, hire date, and applicable collective bargaining agreements.

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.Benefits – Comprehensible benefits for full-time employees (part-time employees receive a limited package tailored to their role):

• 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. The application window for this position is for no more than 60 days. We encourage candidates to apply promptly after the posting date, as the position may close earlier if filled or if the application volume exceeds expectations.