Sr Cyber Security Engineer

Position Overview

The Senior Cyber Security Engineer will bridge the gap between "Compliance" and "Engineering." You will not just audit the system, you will help build it securely and own the cybersecurity workstream end-to-end. This role is responsible for achieving Authority to Operate (ATO) under DoD Risk Management Framework (RMF) standards among other federal certifications while embedding security automation directly into our CI/CD pipelines, and reporting program status and risk directly to LEXSO leadership. You will work side-by-side with backend and frontend engineers to harden the microservices architecture against evolving threats, and you will independently identify security gaps, drive architectural design decisions and shepherd remediation to completion..

Responsibilities

• Own the LEXSO cybersecurity program end-to-end – from gap identification through architectural design to implementation tracking
• Report cyber risk posture and remediation progress; translate technical findings into terms leadership can act on
• Define and maintain the cybersecurity requirements backlog and progress-tracking cadence
• Lead the technical execution of the RMF process to achieve and maintain Authority to Operate (ATO) for the LEXSO platform
• Implement security controls in accordance with NIST SP 800-53 and DoD SRG/STIGs
• Generate and maintain artifacts required for eMASS, including SSPs, POAMs, and SARs
• Conduct self-assessments using ACAS (Nessus) and SCAP Compliance Checker (SCC) to identify vulnerabilities
• Integrate automated security testing (SAST/DAST) tools (e.g., SonarQube, OWASP ZAP) into the GitLab/GitHub CI/CD pipeline
• Develop scripts (Python, Bash, Ansible) to automate patching and configuration management for Linux (RHEL/Ubuntu) servers
• Implement Container Security scanning for Docker/Kubernetes environments to detect vulnerabilities before deployment
• Enforce "Security as Code" principles using Terraform or Helm c