Senior Endpoint Security Engineer

Barracuda Networks Inc.•Chelmsford, MA

11d•$110,000 - $135,000•Remote

About The Position

We are seeking a Senior Endpoint Security & IR Engineer to join our incident response team. You will lead management of our SentinelOne XDR platform, complex investigations across multiple client environments, drive rapid containment of active threats, and serve as a trusted advisor to clients during their most critical security events. This role combines deep technical expertise with client-facing communication skills in a fast-paced, multi-tenant MSSP environment. You will work closely with our Cyber Concierge, Threat Analysts and Automation teams to continuously improve our response capabilities and protect our clients from sophisticated adversaries.

Requirements

Expert knowledge and experience in SentinelOne
Proven experience in windows, mac and Linux environments
Minimum of bachelor’s degree in computer science and 5+ years of hands-on experience in incident response, digital forensics, or security operations
MSSP, MDR, or consulting experience is strongly preferred
Demonstrated ability to manage multiple client engagements simultaneously
Proven track record investigating real-world incidents including ransomware, BEC Attacks, lateral movement, data exfiltration etc.
Experience working in multi-tenant environments with diverse security maturity levels
GIAC certification required; one or more of the following: GCIH (GIAC Certified Incident Handler), GCFA (GIAC Certified Forensic Analyst), GCFE (GIAC Certified Forensic Examiner), GNFA (GIAC Network Forensic Analyst)
Equivalent certifications considered: OSCP, eCIR, eCDFP, EnCE, SC-200, AZ-500
DFIR - Binalyze AIR - remote acquisition, triage, timeline analysis and artifact collection
EDR - SentinelOne threat investigations, Deep Visibility, detection engineering, policy configuration
Microsoft 365 / Defender - BEC investigation, UAL analysis, Safe Links/Attachments, Entra ID etc.
Analytics - Databricks - large-scale log analysis, SQL/Python notebooks, threat hunting at scale
Automation - workflow automation, playbook development, API integrations and continuous monitoring

Nice To Haves

Experience with additional EDR platforms (CrowdStrike, Microsoft Defender for Endpoint)
Advanced knowledge of macOS and Linux forensics
Familiarity with threat intelligence platforms (MISP, Recorded Future, Virus Total Enterprise)
Experience with Velociraptor, KAPE, or Volatility for advanced forensic collection and investigations
Prior experience in IR teams or serving as an IR practice SME

Responsibilities

Lead end-to-end incident response engagements across diverse client environments, from initial triage through remediation and lessons learned
Perform host-based forensics using Binalyze AIR for remote evidence acquisition, triage, and analysis at scale
Design custom detection rules within SentinelOne and fine tune protection policies
Investigate alerts and threats detected by SentinelOne, including Deep Visibility hunting, threat timeline reconstruction, and MITRE ATT&CK mapping
Analyze Microsoft 365 security incidents including business email compromise, OAuth abuse, mailbox rule manipulation, and Azure AD/Entra ID attacks
Conduct log analysis and threat hunting in Elastic to identify indicators of compromise, lateral movement, and data exfiltration
Leverage Databricks for large-scale log analytics, anomaly detection, and threat hunting across aggregated client telemetry
Document findings in clear, executive-ready incident reports tailored to both technical and non-technical stakeholders
Participate in a 24/7 on-call rotation
Develop and maintain Python scripts for evidence collection, log parsing, IOC enrichment, and automated response actions
Build and optimize automated response workflows in Tines to accelerate containment and MTTR
Create and tune detection rules in Elastic and SentinelOne based on investigative findings and emerging threat intelligence
Integrate tooling across the security stack to streamline IR workflows and reduce manual effort
Serve as the primary IR point of contact for client stakeholders during active incidents
Conduct client-facing incident briefings, root cause analysis presentations, and post-incident reviews
Deliver actionable remediation guidance tailored to each client's environment and risk tolerance
Maintain SLA commitments for incident acknowledgment, updates, and resolution
Contribute to client security posture assessments and IR readiness recommendations