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Markondo · 8 hours ago

System Security Engineer

Chantilly, VA, US

Full-time

Onsite

Senior Level, Lead/Staff

11+ years exp

Markon is seeking an experienced System Security Engineer to join a large, collaborative team of developers, software engineers, and data engineers supporting mission-critical systems. This role focuses on secure system design, cloud integration, accreditation support, and lifecycle security engineering in a fast-paced Agile environment.

Real EstateProperty Development

No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

Support system build-outs, testing, maintenance, monitoring, and ongoing enhancements

Decompose requirements and ensure system designs align with enterprise architecture and allocated requirements

Translate customer requirements into hardware and software specifications through functional analysis, cost estimation, and interface definition studies

Identify system integrity risks and implement solutions across the full system lifecycle (concept through disposal)

Integrate systems and services and clearly communicate technical findings and recommendations

Address user requirements and automate/improve existing systems to enhance workflow efficiency

Support the development, documentation, and execution of system security policies

Support Authorization to Operate (ATO) / accreditation efforts for customer systems and applications

Conduct security analysis and maintain system and workflow documentation following updates or iteration changes

Perform application demonstrations and end-user training as required

Support release management activities, including deployment readiness, coordination, and release notes documentation

Provide Tier 3 and Tier 4 support to internal teams and customers

Qualification

AWS cloud environmentsLinux system administrationSecurity certificationsInfrastructure as CodeDevSecOps environmentsSQLAgile environmentsTier 3 supportTier 4 supportCommunication skills

Required

Active TS/SCI with Polygraph

Bachelor's degree and 11–15 years of relevant experience

Experience working in AWS cloud environments

Experience with SQL

Experience in Agile environments using Jira and Confluence (ServiceNow ESP experience preferred)

Experience with Infrastructure as Code tools such as Terraform and/or AWS CloudFormation

Experience working in DevSecOps environments

Experience providing Linux system administration

Familiarity with security accreditation processes and tools, including: RMF and NIST frameworks, Accreditation tools (e.g., Xacta, GreenLight), System and vulnerability scanning, POA&M tracking