Senior Cyber Defense and Incident Response Specialist

Janus Henderson Group; Denver (CO); Hybrid; USD 110,000 - 120,000; Full time

Benefits offered by this job

Hybrid work model

Wellbeing benefits

Volunteer time

Job summary

Janus Henderson Investors is seeking an experienced Cyber Incident Response and Vulnerability Management professional to join our security team in a hybrid Denver-area role. You will triage alerts, assess threats, and coordinate remediation across applications, cloud, and infrastructure.

You will monitor SIEM/EDR tools, conduct IAM reviews, and help mature vulnerability programs while collaborating with development and operations.

Qualifications

• 2+ years in an Information Security role with proven experience in Security Operations or Threat Analysis roles.
• Proven hands-on experience with SIEM and EDR platforms.
• Analytical mindset and knowledge of TTPs, malware behaviour, and incident handling methodologies.
• Familiarity with IAM concepts and monitoring – able to review user permissions, detect abuse, and flag suspicious behaviour or policy violations.
• Experience performing alert triage and incident escalation within defined SLAs, using ITSM tooling such as ServiceNow and Confluence.
• Strong collaboration with application and infrastructure teams in a security context.
• Knowledge of MITRE ATT&CK, OWASP Top 10, and NIST frameworks.
• Excellent written and verbal communication skills for notes and updates.
• Ability to manage multiple projects and prioritize work.
• Exposure to public cloud infrastructure (SaaS, IaaS, PaaS).

Responsibilities

• Perform alert triage of security alerts to validate and prioritise incidents.
• Determine severity, impact, and root cause of incidents using MSSP and internal tools.
• Monitor and respond to security alerts and events from SIEM/IDS/IPS/EDR tools, meeting SLAs.
• Review IAM to identify abuse of permissions and monitor policy violations.
• Assist in isolating affected systems to contain threats under supervision.
• Work notes and artefact logging in ITSM and Confluence tickets.
• Facilitate handovers to other SOC team members at shift end and provide updates to colleagues.
• Seek guidance from Mid-level Tier 2 analysts when needed.

Skills

Security Operations

SIEM

EDR

Threat Analysis

IAM monitoring

Incident escalation

Collaboration

Communication

Cloud familiarity

Tools

ServiceNow

Confluence

Job description

Janus Henderson Investors is seeking an experienced Cyber Incident Response and Vulnerability Management professional to join our security team in a hybrid Denver-area role. You will triage alerts, assess threats, and coordinate remediation across applications, cloud, and infrastructure.

You will monitor SIEM/EDR tools, conduct IAM reviews, and help mature vulnerability programs while collaborating with development and operations.