Lead - Incident Responder Cybersecurity

Frontier Careers • Denver, CO

12h • Hybrid

About The Position

The Lead Incident Responder of Cybersecurity Operations is responsible for investigating, containing, eradicating, and recovering from cybersecurity incidents across the Frontier enterprise environment. This role provides leadership, hands-on incident response, digital forensics, threat analysis, and coordination support during active incidents. The Lead Incident Responder delivers timely and accurate analysis of internal and external threats using detection and response platforms and collaborates with SOC analysts, threat hunters, IT teams, and management to reduce organizational risk. The scope of the environment includes SIEM, EDR, network security controls, cloud platforms, vulnerability management, and threat intelligence services.

Requirements

• Bachelor’s degree in computer science, information technology, cybersecurity, or equivalent combination of education and relevant experience (required)
• 5-10 years of relevant cybersecurity or IT operations experience (required)
• 4+ years of hands-on incident response or security operations experience (required)
• Experience working with enterprise cybersecurity tools such as SIEM, EDR, IDS/IPS, vulnerability management, and threat intelligence platforms
• Experience analyzing adversary tactics and techniques using the MITRE ATT&CK framework
• Familiarity with cybersecurity standards and frameworks such as NIST CSF, NIST 800-61, and PCI DSS (desired)
• Strong understanding of incident response processes and investigative methodologies
• Proficiency in SIEM platforms (e.g., Splunk, Microsoft Sentinel, QRadar, or similar)
• Hands-on experience with endpoint detection and response (EDR) tools such as SentinelOne, CrowdStrike, or Microsoft Defender
• Ability to analyze and correlate logs from firewalls, endpoints, servers, SaaS platforms, and cloud environments
• Proficiency in network traffic and packet analysis using tools such as Wireshark
• Working knowledge of malware triage and basic static/dynamic analysis techniques
• Understanding of Active Directory, identity-based attacks, and authentication workflows
• Knowledge of Windows and Linux operating systems and common attack vectors
• Ability to apply threat intelligence and OSINT to incident investigations
• Strong analytical and problem-solving skills with attention to detail
• Ability to communicate clearly and effectively, both verbally and in writing
• Ability to work independently and collaboratively in a fast-paced, high-pressure environment
• Willingness to support after-hours and weekend on-call rotation

Nice To Haves

• CompTIA Security+
• CompTIA CySA+
• GIAC Certified Incident Handler (GCIH)
• GIAC Intrusion Analyst (GCIA)
• GIAC Certified Enterprise Defender (GCED)
• CEH
• Microsoft SC-200 or cloud security certifications (Azure/AWS)

Responsibilities

• Monitor, investigate, analyze, respond to, and document cybersecurity incidents identified through detection and response platforms.
• Serve as Incident Commander, when assigned, to run the bridge, track actions/owners, and drive cadence.
• Define severity, business impact, and required engagement level (e.g., Sev1–Sev4), and lead initial triage to determine scope and next actions.
• Execute the full incident response lifecycle: identification, containment, eradication, recovery, and post-incident review
• Perform in-depth alert and event analysis across SIEM, EDR, network, endpoint, and cloud sources
• Collect, preserve, and analyze forensic evidence including logs, disk artifacts, memory artifacts, and network traffic
• Apply threat intelligence, indicators of compromise (IOCs), and adversary tactics and techniques using the MITRE ATT&CK framework
• Escalate incidents to Cybersecurity Operations Management and Incident Response Team members as required
• Support active incident response efforts, tabletop exercises, and threat simulation activities
• Conduct investigative analysis to determine impact, scope, and root cause of security incidents
• Lead the detection engineering feedback loop by converting incident learnings into new detections/use cases (SIEM rules, EDR analytics), tune to reduce false positives, and validate via testing.
• Assist with threat hunting activities to proactively identify malicious activity within the environment
• Validate suspected exploitation of vulnerabilities and support remediation efforts
• Coordinate with IT, application, and infrastructure teams to support containment and recovery actions
• Maintain accurate incident documentation, timelines, and reports
• Develop, coordinate, and maintain playbooks for common cyber-related enterprise events including ransomware, business email compromise, identity compromise, etc.
• Use (and help improve) SOAR playbooks for containment (account disable, host isolation, IOC blocking), enrichment, and reporting.
• Contribute to the development and maintenance of incident response procedures and standard operating procedures (SOPs)
• Participate in after-hours and on-call rotation requirements for cybersecurity incidents
• Provide regular status updates to Cybersecurity Operations Management during investigations
• Coordinate internal/external communications (Legal, Privacy, Comms/PR, HR) following established playbooks.
• Coordinate with MSSP/IR retainer and key vendors as needed during active incidents
• Track and report MTTA/MTTR, dwell time, containment time, recurrence, and lessons learned; contribute to operational reporting.

Benefits

• Flight benefits for you and your family to fly on Frontier Airlines.
• Buddy passes for your friends so they can experience what makes us so great.
• Discounts throughout the travel industry on hotels, car rentals, cruises and vacation packages.
• Discounts on cell phone plans, movie tickets, restaurants, luggage and over 2,000 other vendors.
• Flexible work schedules that support work/life balance.
• Total Rewards program including a competitive base salary, short term incentives, long-term incentives, paid holidays, 401(k) plan, vacation/sick time and medical/dental/vision insurance that begins the 1st of the month following your hire date.
• The HOPE League, Frontier Airlines’ non-profit organization, is dedicated to providing employees financial assistance during catastrophic hardship.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Associate degree