Endpoint Security Engineer

Catapult Federal Services is seeking an Endpoint Security Engineer to provide senior engineering support for enterprise endpoint security. The role involves designing, implementing, and maintaining endpoint protection strategies while leading vulnerability remediation and ensuring compliance with federal cybersecurity requirements.

Responsibilities:

• Architect, implement, and maintain enterprise endpoint protection strategies across Windows, macOS, iOS, workstation, and server platforms
• Define, enforce, and continuously improve endpoint security baselines using Microsoft Defender for Endpoint and Microsoft Intune
• Lead deployment and configuration of antivirus and endpoint protection tooling, including policy tuning, signature/DAT update management, and scheduled scans
• Validate new endpoint security configurations in controlled environments before production rollout
• Own endpoint patching strategy and execution across managed endpoint environments, including supersedence management
• Monitor vulnerability findings, assess risk and severity, and coordinate remediation with technical teams and system owners
• Lead development, tracking, and closure of endpoint POA&Ms with clear milestones and risk-based prioritization
• Ensure remediation and patch activities support ongoing compliance objectives and audit readiness
• Monitor endpoint security telemetry and respond to endpoint-specific threats, suspicious activity, and policy non-compliance
• Serve as an escalation point for complex endpoint incidents and coordinate with SOC and incident response stakeholders for broader investigations
• Create and maintain automation scripts and reporting workflows for endpoint compliance, vulnerability status, and remediation tracking
• Maintain accurate SOPs, runbooks, and status reporting to support governance, audit response, and service transparency
• Collaborate with federal stakeholders, ISS teams, and partner vendors to validate endpoint security posture and operational readiness
• Provide senior technical guidance to engineering and operations teams on endpoint security architecture and best practices
• Support audit remediation activities (e.g., FISMA, IG, GAO) by preparing evidence and tracking corrective actions
• Drive continuous improvement initiatives that increase automation, resilience, and efficiency of endpoint security operations

Requirements:

• Citizenship/Work Authorization: Must meet contract requirements
• Clearance: Ability to obtain and maintain SEC Public Trust (or higher if required)
• Education: Bachelors in a relevant field (e.g., Information Technology, Computer Science, Engineering)
• 8+ years of experience in enterprise endpoint security engineering in large, regulated environments
• Advanced experience designing, implementing, and managing Microsoft Defender for Endpoint and Intune security baselines
• Hands-on experience in vulnerability management, endpoint patching strategies, supersedence processes, and POA&M resolution
• Experience documenting SOPs/runbooks and providing compliance-focused reporting to federal stakeholders
• Microsoft Defender for Endpoint
• Microsoft Intune endpoint and mobile device security baseline management
• Endpoint vulnerability assessment, remediation coordination, and POA&M tracking
• Enterprise endpoint patching and supersedence management
• Antivirus/endpoint protection deployment, signature/DAT update operations, and scheduled scan management
• Endpoint threat triage, escalation, and response coordination
• Automation scripting for reporting and remediation
• Process documentation, status reporting, and compliance evidence support
• Experience supporting federal IT operations under FISMA and NIST-aligned controls
• Experience implementing endpoint compliance enforcement at enterprise scale across distributed/remote workforces
• Experience integrating endpoint tooling and metrics into enterprise dashboards and executive reporting
• Demonstrated success leading cross-team remediation efforts for audit findings and complex security incidents
• Prior experience supporting SEC or similarly regulated federal civilian agency environments
• Microsoft SC-200 (Security Operations Analyst)
• Microsoft MD-102 (Endpoint Administrator)
• CISSP