Senior Information Security Associate - Incident Response & Threat Hunting

Nomura Holdings, inc. • Jacksonville, FL

40d • $95,000 - $110,000

About The Position

We are seeking a seasoned Information Security Analyst to join our cybersecurity team. The ideal candidate will spearhead incident response efforts, lead proactive threat hunting initiatives, and drive security improvements across the organization.

Requirements

• Minimum 4 years of hands-on experience in information security
• Demonstrated expertise in incident response, digital forensics, and threat hunting
• Proven track record of leading complex security investigations
• Advanced proficiency in SIEM platforms and query languages
• Expertise in digital forensics tools and methodologies
• Experience with threat intelligence platforms and IOC implementation
• Strong understanding of EDR/XDR technologies
• Proficiency in at least one scripting language (Python, PowerShell)
• Knowledge of log analysis and network security monitoring
• Strong analytical and problem-solving abilities
• Excellence in technical writing and documentation
• Advanced presentation and stakeholder communication skills
• Ability to translate technical findings into business impact
• Experience in conducting technical training sessions
• Deep understanding of cyber attack methodologies and TTPs
• Expertise in incident handling frameworks (NIST, SANS)
• Knowledge of security control frameworks (MITRE ATT&CK, CIS)
• Understanding of threat intelligence concepts and application
• Familiarity with regulatory compliance requirements
• Must be able to work rotating shifts as part of 24/7 coverage
• May require on-call availability
• Must be able to respond to critical incidents outside normal business hours

Nice To Haves

• Relevant certifications (GCFA, GCIH, EnCE, SANS FOR508)
• Bachelor's degree in Computer Science, Cybersecurity, or related field
• Experience with enterprise security architecture
• Knowledge of cloud security concepts and tools

Responsibilities

• Lead Tier-3 security incident investigations from detection through resolution
• Perform digital forensics analysis and evidence collection using enterprise toolsets
• Conduct root cause analysis and identify attack vectors
• Implement incident containment and eradication strategies
• Develop comprehensive post-incident remediation plans
• Execute proactive threat hunting campaigns using threat intelligence
• Develop and optimize custom queries for security tools and SIEM platforms
• Conduct hypothesis-driven investigations
• Perform IOC-based threat hunting across enterprise environments
• Analyze and report on emerging threat landscapes
• Create and maintain threat hunting playbooks
• Design and implement security control improvements
• Enhance detection rules and use cases
• Deliver executive-level reports for management and stakeholders
• Facilitate lessons learned workshops
• Conduct trend and metrics analysis
• Lead knowledge transfer sessions

Benefits

• full range of medical, financial, and/or other benefits (including 401(k) eligibility and various paid time off benefits, such as vacation, sick time, and parental leave)

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees