09 - Senior Specialist, Information Security Req ID: 137491 Remote Position: Hybrid Hiring Manager: Paul Stanners Band: 09 Region: Asia Country: India State/Province: Chennai City: Guindy, Chennai

Summary :

- In this role, you will be responsible for designing, implementing, auditing, and maintaining ThreatLocker policies across our organization (and/or client environments). You will play a critical role in preventing ransomware, malware, and unauthorized software execution by managing Application Whitelisting (Allowlisting), Ringfencing, Storage Control, and Elevation Control.

Key Responsibilities : ThreatLocker Administration & Management

- Policy Creation & Tuning: Design, implement, and maintain ThreatLocker Application Allowlisting policies to ensure only authorized software can execute.
- Storage Control: Define and enforce policies for securing USB drives, network shares, and local files against unauthorized access or data exfiltration.
- Manage allowlisting, Learning Mode, and temporary exceptions.
- Monitoring, Auditing & Incident Response
- Approval Queue Management: Monitor and process daily ThreatLocker approval requests from users efficiently, balancing security with operational productivity.
- Learning Mode Audits: Review, analyze, and baseline current endpoints during the "Learning Mode" phase to ensure seamless transitions to "Secured Mode."
- Log Analysis & Reporting: Investigate blocked files, denied executions, and policy violations. Use ThreatLocker audit logs to identify potential security incidents or shadow IT.
- Integration: Collaborate with the SOC/SIEM team to forward ThreatLocker logs and integrate them into the broader security monitoring ecosystem.
- Track service metrics to ensure business productivity.

Maintenance & Strategy

- Environment Maintenance: Keep ThreatLocker agents updated across all endpoints and servers.
- Testing & Validation:



Test software updates and patch deployments in a sandbox environment to ensure they comply with existing ThreatLocker rules before company-wide rollout.
- Documentation: Maintain clear, up-to-date documentation of standard operating procedures (SOPs), policy exceptions, and approval workflows.
- Maintain Ringfencing and policy standards.

Required Experience :

- ThreatLocker Expertise: Minimum of 3 years of hands-on experience specifically managing, configuring, and troubleshooting ThreatLocker in a production environment.
- IT/Cybersecurity Background: 3+ years of experience in System Administration, Helpdesk Tier 3, Network Engineering, or a Cybersecurity operations role.
- OS Proficiency: Deep, foundational knowledge of Windows OS (Registry, File Systems, Services, Active Directory, and Group Policy). Experience with macOS or Linux is a strong plus.
- Scripting: Basic familiarity with PowerShell or Command Prompt for troubleshooting and automation.

Knowledge/Skills/Competencies : Soft Skills

- Customer-Centric Communication: Ability to explain security restrictions to non-technical staff diplomatically and find ways to enable business operations safely.
- Attention to Detail: Zero Trust requires precision; a misplaced rule can either cause a security gap or halt business operations.

Preferred Certifications (A Plus, Not Required)

- ThreatLocker Professional or ThreatLocker Expert certifications.
- CompTIA Security+, CySA+, or Network+.
- Microsoft Certified: Windows Server or Azure Administrator.

Physical Demands :

- Duties are primarily performed in an office environment but may require occasional on-call availability and emergency response.
- Extended periods of sitting, as well as visual concentration on security dashboards, logs, and reports.

Notes : Celestica is an equal opportunity employer. All qualified applicants will receive consideration for employment and will not be discriminated against on any protected status (including race, religion, national origin, gender, sexual orientation, age, marital status, veteran or disability status or other characteristics protected by law).

📌 Threatlocker Specialist (Guindy)
🏢 Celestica
📍 Guindy