Senior Systems Engineer

Leidos is seeking a Systems Engineer for a 200+ FTE technical development program supporting the Sponsor’s Entitlement Programs as well as IdAM /ICAM, Authentication, Authorization, Attributes and Digital Policy Management. The Systems Engineer will work with a large team of developers, software engineers and data engineers. The successful candidate will support continuity of our customer’s mission by helping to modernize and implement industry standards while ensuring secure, reliable, and uninterrupted availability of IT systems.This position is for a Systems Engineer for the enterprise PKI program, and their associated cloud infrastructures located on a secure network. The Systems Engineer will work with a team of engineers, developers, cybersecurity engineers, system architects, and testers.Core business hours are typically from 9 AM – 3 PM, five days a week. Hours can be flexible for either early arrivals, and/or late departures. Some after hours or weekend work may be required to accommodate system deployments and upgrades.While not required, it is highly desirable for the Candidate to have knowledge of Public Key Infrastructure (PKI) and understand key concepts like digital certificates, Certificate Authorities (CAs), Registration Authorities (RAs), key management practices, cryptographic algorithms, certificate revocation procedures, and trust models. Additionally, the ability to design a robust system to issue, manage, and revoke digital certificates while ensuring the integrity and authenticity of users and entities within a network is desirable. Candidates who do not have all these abilities, but have the ability to learn them, will be considered.*** Applicants for this position are expected to have significant, hands-on systems engineering experience. ***Primary ResponsibilitiesPerforming regular maintenance of cloud infrastructure resources, to include patching, configuration, upgrading as neededEnsure designs are compatible with the architecture and security requirementsIntegrate systems and services for firewall and network componentsWorking with the team’s security engineer to address, mitigate security findings stemming from system security scansLinux OS configuration, patching, and maintenanceExperience with relational databases such as PostgreSQL and MySQLIdentify and suggest risk mitigation techniquesIntegrate systems and servicesStrong, hands-on experience with Linux (CLI)Experience with scripting and programming languages like BASH and PythonExperience in working on teams utilizing Agile workflows and processesHands on experience with scriptingMaintenance and deployment of containerized solutionsRequired QualificationsActive TS/SCI with PolygraphRequires a Bachelor of Science (BS) degree and 8 + years of relevant experience as follows:Strong, hands-on experience with Linux (CLI)Experience with scripting and programming languages like BASH and PythonExperience in working on teams utilizing Agile workflows and processesHands-on experience with scriptingKnowledge and experience in development and deployment of containerized solutions using Kubernetes and EKSDesired QualificationsExperience with Public Key Infrastructure (PKI) and understand key concepts like digital certificates, Certificate Authorities (CAs), Registration Authorities (RAs), key management practices, cryptographic algorithms, certificate revocation procedures, and trust modelsExperience working with CloudFormation / Puppet / Groovy, or other configuration and automation toolsExperience with maintaining JenkinsNetwork engineering troubleshooting between Cloud environments and non-Cloud environmentsExperience working with Infrastructure as Code (IaC) solutions such as Ansible / Terraform, or other configuration and automation toolsSolid understanding of Web Application Firewall (WAF) configuration and managementExperience with networking (e.g., ports, routing tables, subnets, VPNs, firewalls, routers, etc.) to include design, integration and troubleshooting issuesExperience in working in a cloud-based environment (AWS)Experience with the installation, configuration and other configuration management alerting capabilitiesIf you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.Original Posting:October 21, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.Pay Range:Pay Range $107,900.00 - $195,050.00The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.SummaryLocation: Chantilly, VAType: Full time