Senior Cybersecurity Specialist – Threat Detection & Vulnerability Management

Job Description

Company: HCLTech

We are seeking a hands-on Senior Cybersecurity Specialist with strong experience in threat detection, incident response, email security, and vulnerability management. The role will focus on investigating complex security incidents, threat hunting, email/BEC investigations, vulnerability risk prioritization, and driving remediation across enterprise environments.

Key Responsibilities

• Investigate and respond to security incidents using SentinelOne EDR or equivalent platforms.
• Perform threat hunting, malware analysis, IOC/TTP analysis, root-cause analysis, and incident containment.
• Investigate phishing, spear-phishing and BEC incidents using Abnormal Security, Microsoft Defender for Office 365, Exchange Online, and Microsoft 365.
• Analyze email headers, URLs, attachments, SPF, DKIM and DMARC configurations.
• Assess and prioritize vulnerabilities using Tanium or equivalent vulnerability-management platforms.
• Evaluate CVSS, exploitability, exposure and business impact to determine remediation priority.
• Partner with infrastructure and application teams to drive vulnerabilities through remediation and closure.
• Produce clear technical investigation reports, risk assessments, and executive-level security reporting.

Required Skills

• 5–8+ years in Cybersecurity Operations, Incident Response, Threat Hunting or Vulnerability Management.
• Strong hands-on experience with SentinelOne/EDR, Abnormal Security or email-security platforms, and Tanium or equivalent.
• Strong knowledge of MITRE ATT&CK, IOC/TTP analysis, malware analysis, BEC/phishing investigations and CVSS.
• Experience with Microsoft 365, Defender for Office 365, Exchange Online and Azure AD/Entra ID security.
• Strong investigative, RCA, stakeholder-management and remediation-governance skills.

Source: LinkedIn