Linux Vulnerability Remediation Engineer (United States)

Linux Vulnerability Remediation Engineer (Server Infrastructure – RHEL 7/8/9/10) -100% Remote

Duration: Direct hire (FTE) -- Pay: Market - NO (Sponsorship, H1B, F1, OPT, EAD, Corp-to-Corp)

CBTS is searching for a Linux Vulnerability Remediation Engineer is responsible for accelerating vulnerability remediation and patching activities across server infrastructure . This role focuses on Red Hat Enterprise Linux (RHEL) 7/8/9/10 and leverages existing automation and scanning technologies (e.g., Qualys, Chef, shell scripting, Ruby ) to identify, prioritize, implement, validate, and close vulnerabilities in alignment with internal compliance requirements (e.g., Meridian requirements ). The engineer partners closely with operations, Engineering Teams , application owners, and support teams to deliver timely fixes while maintaining server stability and change discipline.

Responsibilities:

Vulnerability Remediation & Patch Management

• Own and execute end-to-end remediation for vulnerabilities identified on Linux servers (RHEL 7/8/9/10) , including OS/package patching and configuration hardening.
• Fast-track and manage all Meridian-related remediation requirements as they are received, ensuring adherence to defined SLAs and audit expectations.
• Triage vulnerability findings (primarily from Qualys ) and translate them into actionable remediation plans, considering exploitability, criticality, asset tiering, and operational risk.
• Coordinate remediation activities for:
• Kernel and package updates (YUM/DNF), security errata, and required reboots where applicable.
• CIS/STIG-aligned configuration changes (as applicable in the environment).
• Mitigations/compensating controls when immediate patching is not feasible (documented and approved per process).

Automation, Configuration Management & Engineering

• Develop, enhance, and maintain remediation automation using:
• Must have Chef (Primary) (cookbooks/recipes, attributes, templates, policy files as applicable)
• Ansible (playbooks, roles, inventories, modules)
• Shell scripting (Bash) and Ruby for server-side automation and custom remediation logic
• Convert recurring manual remediation steps into repeatable automated solutions and standardized runbooks.
• Ensure code follows internal engineering standards: version control, peer review, testing, documentation, and change management.

Validation, Closure & Reporting

• Validate remediation effectiveness by re-scanning and verifying closure in Qualys (and/or approved internal validation methods).
• Confirm fixes did not introduce regressions; coordinate with application and platform teams for post-change verification.
• Maintain accurate documentation of remediation actions, approvals, exceptions, and closure evidence to support audit and compliance needs.
• Provide progress updates, metrics, and risk status to stakeholders (e.g., open critical/high items, aging items, SLA adherence).

Cross-Team Coordination & Operational Execution

• Schedule and lead remediation calls with infrastructure support teams, application owners, and other stakeholders to drive timely execution.
• Work within change management processes: create/execute change plans, develop rollback steps, and coordinate maintenance windows.
• Partner with platform engineering to improve standard server baselines and prevent vulnerability recurrence.

Vendor & Release Coordination (as needed)

• Follow up with vendors (e.g., Red Hat or software providers) for patch availability, release schedules, and remediation guidance when vulnerabilities require vendor action.
• Track advisories (RHSA/RHBA) and coordinate planned rollout timelines where applicable.

Scope (In-Scope / Out-of-Scope)

In-Scope

• Server infrastructure running RHEL 7, RHEL 8, RHEL 9 , RHEL 10
• Vulnerability remediation, hardening, and patching activities related to server OS and server-installed packages/software
• Automation for server remediation workflows

Out-of-Scope

• End-user computing (desktops/laptops)
• Network/security appliances, storage appliances, or specialized non-server devices

Requirements:

• 6-10 years of Strong hands-on experience with RHEL 7/8/9/10 in enterprise environments.
• Proven experience driving vulnerability remediation and patch management for Linux servers.
• Expertise with Qualys (or equivalent vulnerability scanners) including interpreting findings, false-positive validation, and closure verification.
• Automation experience with Chef in production.
• Strong scripting skills: Bash , plus working proficiency in Ruby (or ability to maintain/extend existing Ruby codebases).
• Understanding of Linux security fundamentals (permissions, services, SSH hardening, package management, kernel considerations).
• Experience working with change management, incident/problem management, and coordinating across multiple support teams.

Preferred Qualifications

• Familiarity with compliance/security frameworks (e.g., CIS benchmarks, STIG concepts) as applied to Linux servers.
• Experience with CI/CD or automated testing for infrastructure code (linting, unit/integration testing where applicable).
• Experience operating in large-scale environments (hundreds/thousands of servers) with tiered production controls.
• Working knowledge of container host hardening and server-side runtime dependencies (if applicable to the server fleet).

Key Skills & Competencies

• Remediation prioritization and risk-based decision making
• Strong troubleshooting and root-cause analysis (package conflicts, dependency issues, service impacts)
• Clear communication and ability to drive closure across stakeholders
• Documentation discipline and audit readiness mindset
• Ability to deliver under tight timelines while maintaining system stability

Deliverables / Success Measures

• Reduction in open Patch NOW/Critical/High vulnerabilities and improved SLA compliance.
• Consistent, repeatable remediation through Chef/Ansible automation.
• Verified closures in Qualys with clear evidence and minimal re-open rates.
• Improved remediation cycle time for Meridian requirements and other prioritized findings.
• Fewer recurring vulnerability patterns through baseline improvements and preventive controls.

CBTS provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a protected veteran in accordance with applicable federal, state and local laws.