Sr Information Security Analyst

Perrigo•Allegan Township, MI

1d•Hybrid

About The Position

The Senior Information Security Analyst is a senior individual contributor within the Cyber Defense team responsible for leading security investigations, incident response, threat detection and hunting, and the continuous improvement of enterprise security operations. The role works across endpoint, identity, email, cloud, and data security technologies to identify, contain, and remediate threats. The successful candidate will be an experienced, hands-on security professional who can independently lead complex investigations, improve detections and response processes, mentor other analysts, and take ownership of key Cyber Defense capabilities. Experience with data loss prevention (DLP) and data security is strongly preferred.

Requirements

Bachelor’s degree in Cybersecurity, Information Technology, or a related field, or equivalent professional experience
7+ years of relevant cybersecurity experience, including significant hands-on security operations, incident response, threat detection, or threat hunting experience
Demonstrated ability to independently investigate and lead complex cybersecurity incidents
Hands-on experience with enterprise SIEM and EDR/XDR technologies
Strong understanding of endpoint, identity, network, email, and cloud attack techniques
Working knowledge of Active Directory and Microsoft Entra ID security concepts
Strong analytical, troubleshooting, documentation, and communication skills

Nice To Haves

CrowdStrike Falcon, including EDR and/or Identity Protection
Splunk Enterprise Security, CrowdStrike Next-Gen SIEM, Microsoft Sentinel, or comparable enterprise SIEM platforms
Cortex XSOAR or comparable SOAR/security automation platforms
Microsoft 365 and Entra ID security investigations
Enterprise DLP/data security technologies such as Proofpoint, Microsoft Purview, or comparable platforms
Email security and account-takeover investigation
PowerShell, Python, SPL, KQL, or other scripting/query languages used for security investigation and automation
Threat intelligence, vulnerability/exposure management, and hybrid enterprise environments

Responsibilities

Lead investigation, containment, remediation, and post-incident review of cybersecurity incidents across endpoint, identity, email, cloud, and network environments
Investigate suspicious activity using SIEM, EDR/XDR, identity, email security, and other enterprise security telemetry
Develop incident timelines, determine scope and root cause, document findings, and communicate risk and recommended actions to technical and leadership stakeholders
Perform proactive threat hunting and identify opportunities to improve detection and response coverage
Serve as an escalation point and mentor for other security analysts during complex investigations
Develop, tune, and improve security detections and correlation logic based on threats, incidents, and observed control gaps
Use enterprise SIEM platforms to investigate threats, hunt across security telemetry, and improve monitoring coverage
Support security orchestration and automation use cases, including playbooks for investigation, enrichment, containment, and notification
Identify repetitive SOC processes that can be automated or streamlined
Investigate endpoint threats using CrowdStrike Falcon or comparable enterprise EDR/XDR platforms
Investigate identity-based attacks involving Active Directory, Microsoft Entra ID, authentication, privileged accounts, OAuth applications, and session/token abuse
Analyze Microsoft 365 and cloud security events and work with engineering and infrastructure teams on containment and remediation
Use threat intelligence and indicators of compromise to scope incidents and proactively hunt for related activity
Support and improve enterprise DLP and data security monitoring across endpoint, email, cloud, and collaboration platforms
Investigate potential data-loss, sensitive-data exposure, and policy-violation events and coordinate appropriate response
Assist with tuning DLP policies and workflows to improve detection quality while reducing unnecessary business impact
Partner with security, privacy, legal, and business stakeholders as appropriate during sensitive-data investigations
Identify gaps discovered through incidents, threat hunting, and operational analysis and recommend practical improvements
Develop and maintain investigation procedures, response playbooks, and operational documentation
Collaborate with Security Engineering, IAM, Network, Cloud, and other technology teams to strengthen preventive and detective controls
Take ownership of assigned Cyber Defense technologies or operational capabilities and drive their continued maturity