Senior Information Security Incident Response Lead

Dimension Data
Anywhere
Workplace: OnsiteFull timeFunction: CybersecurityExperience: 5+ yearsEducation: bachelorsSkills: ["Analytical problem-solving","Incident triage under pressure","Communication","Team collaboration","Leadership/mentoring"]

Lead and manage complex security incidents, serving as a primary stakeholder contact. Conduct deep alert analysis, threat hunting, and forensic investigations across endpoints, networks, and cloud environments. Develop detection rules, improve SIEM/EDR response workflows, and provide executive-ready incident reporting. Support adversary emulation, red teaming/penetration testing, and threat intelligence analysis while mentoring junior analysts and strengthening the organization’s security posture.

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Dimension Data
Dimension Data
2 months ago

Senior Information Security Incident Response Lead

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Last checked: 6 days agoStatus: Live

Job Summary

Lead and manage complex security incidents, serving as a primary stakeholder contact. Conduct deep alert analysis, threat hunting, and forensic investigations across endpoints, networks, and cloud environments. Develop detection rules, improve SIEM/EDR response workflows, and provide executive-ready incident reporting. Support adversary emulation, red teaming/penetration testing, and threat intelligence analysis while mentoring junior analysts and strengthening the organization’s security posture.
Location: Anywhere
Workplace: Onsite
Employment Type: Full time
Job Function: Cybersecurity
Seniority: Mid level

Key Responsibilities

  • •Lead and manage complex security incidents and coordinate with stakeholders.
  • •Perform deep analysis of security alerts to identify, mitigate, and remediate threats.
  • •Conduct forensic investigations on compromised hosts, networks, and cloud environments.
  • •Hunt for adversarial activity and anomalous behaviors across large datasets; analyze malware samples.
  • •Develop detection rules, produce incident reports/executive summaries, and mentor junior analysts to improve IR methods.

Key Requirements

  • •5+ years in cybersecurity with at least 2 years in incident response, threat hunting, or forensic analysis.
  • •Extensive experience responding to targeted attacks from APT groups, cybercriminals, or nation-state actors.
  • •Strong forensic and investigation skills across Windows, Linux, and macOS, including network forensics and traffic analysis.
  • •Proficiency with SIEM (Splunk, Sentinel, QRadar) and EDR (CrowdStrike, Microsoft Defender ATP) along with malware analysis techniques.
  • •Experience with cloud security investigations (AWS, Azure, GCP) and scripting automation (Python, PowerShell or similar).
Experience:5+ yearsCybersecurityIncident responseThreat huntingDigital forensicsThreat intelligenceCloud securityRed teaming
Education:Bachelor's in Computer Science, Cybersecurity, or a related field
Skills:Analytical problem-solvingIncident triage under pressureCommunicationTeam collaborationLeadership/mentoring
Certifications:GIAC (GCFA, GNFA, GCIH, GCIA, GREM)CISSPCEHOSCPAWS Security SpecialtyMicrosoft Azure Security
Tech Stack:WiresharkZeekSplunkMicrosoft SentinelQRadarCrowdStrikeMicrosoft Defender ATPPythonPowerShellAWSAzureGCPMITRE ATT&CKSIEMEDR

Company Brief

Dimension Data
Dimension Data, operating under NTT Ltd, provides managed IT services, cloud and data center solutions, networking, cybersecurity, and digital transformation services to enterprise customers worldwide.
Industry: Professional Services
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Established Company
Valuation: Public Company (Market Cap in USD)
Headquarters: London, United Kingdom
Founded: 1983
WebsiteLinkedIn