Cyber Threat Hunter

Fiserv

Cyber Threat Hunter developing behavior-based detection capabilities within Cyber Security Operations at Fiserv. Partnering closely with cross-functional teams in a cloud environment to enhance detection engineering.

Posted 6/9/2026full-timeBerkeley Heights • Florida, New Jersey • 🇺🇸 United StatesSeniorLead💰 $128,000 - $216,000 per yearWebsite

Tech Stack

Tools & technologies

CloudCyber SecurityPython

About the role

Key responsibilities & impact

Build and maintain behavior-based detections that identify adversary activity through sequences, relationships, and deviations across identity, endpoint, cloud, network, and application telemetry.
Translate attacker techniques, malware behaviors, and adversary tradecraft into testable, explainable, and durable detection logic using a detection-as-code approach.
Define telemetry, enrichment, and normalization requirements needed to improve signal quality, close coverage gaps, and support scalable detection outcomes in a cloud environment.
Apply statistical methods, machine learning techniques, and Python-based analytical workflows to develop behavioral models, engineering features, and improve precision detection and operational actionability.
Validate suspicious behaviors using digital forensics and incident response methods to distinguish malicious activity from benign anomalies, misconfigurations, and expected operational patterns.
Partner with security operations, incident response, and detection engineering teams to operationalize detections with triage guidance, severity rationale, playbook alignment, and MITRE ATT&CK classification and coverage reporting.
Use external threat intelligence as prioritization context while ensuring detections are grounded in observable behavior and telemetry within the enterprise environment.

Requirements

What you’ll need

8+ years of experience in detection engineering, proactive threat hunting, digital forensics and incident response, malware analysis, reverse engineering, threat research, red teaming, purple teaming, advanced security operations, or a combination of these domains.
8+ years of experience building behavior-based detections across large-scale enterprise telemetry using correlation, sequence analysis, behavioral analytics, and operational detection logic.
8+ years of experience using digital forensics and incident response methods across host, identity, cloud, and network investigations to validate suspicious activity and improve detection fidelity.
8+ years of experience applying Python for data analysis, automation, feature engineering, and repeatable analytical workflows in cybersecurity use cases.
6+ years of experience applying statistical modeling, machine learning methods, or comparable analytical techniques to security telemetry, including baselining, outlier detection, clustering, time-series analysis, behavioral scoring, or graph-based analysis.
Experience using AI-assisted development tools with validation, testing, reproducibility, and secure coding practices in analytics, automation, or detection development workflows.
Bachelor's degree or higher in Computer Science, Cybersecurity, Information Security, Engineering, Data Science or related field or equivalent combination of education, related experience and/or military experience.
Relevant certifications such as GIAC Reverse Engineering Malware (GREM), GIAC Certified Forensic Analyst (GCFA), GIAC Certified Incident Handler (GCIH), GIAC Certified Intrusion Analyst (GCIA), GIAC Reverse Engineering Malware (GREM), CompTIA CySA+, Certified Information Systems Security Professional (CISSP), Certified Threat Hunting Professional (CTHP), Certified Threat Intelligence Analyst (CTIA), Certified Cloud Security Professional (CCSP), or equivalent cybersecurity certification.

Benefits

Comp & perks

Fuel Your Life program to support your physical, financial, social, and emotional well-being.
Paid holidays and generous time away policies.
No-cost mental health support through Employee Assistance Programs.
Living Proof program to recognize your peers’ extra effort with points redeemable for rewards.
Eight Employee Resource Groups to foster a collaborative culture and expand your network.
Unparalleled professional growth with training, development, and internal mobility opportunities.
Medical, dental, vision, life, and disability insurance options available from day one.
Retirement planning including 401k match and discounted shares with the Employee Stock Purchase Plan.
Tuition assistance and reimbursement program.
Paid parental and military leave.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Pythonstatistical modelingmachine learningbehavioral analyticsdigital forensicsincident responsecorrelationsequence analysisfeature engineeringAI-assisted development

Certifications

GIAC Reverse Engineering Malware (GREM)GIAC Certified Forensic Analyst (GCFA)GIAC Certified Incident Handler (GCIH)GIAC Certified Intrusion Analyst (GCIA)CompTIA CySA+Certified Information Systems Security Professional (CISSP)Certified Threat Hunting Professional (CTHP)Certified Threat Intelligence Analyst (CTIA)Certified Cloud Security Professional (CCSP)