Senior Security Analyst (Detection & Response)Location: RemoteCooperation: B2B / ContractAbout the RoleWe are looking for a Senior Security Analyst to lead threat detection, incident response, and phishing analysis. The role involves optimizing detection rules, managing CrowdStrike alerts, and collaborating with security and IT teams to strengthen overall security posture.Responsibilities Analyze and respond to CrowdStrike and SIEM incidents Investigate and remediate phishing tickets, identifying attack patterns Develop and tune custom detection rules (Sigma or similar) Maintain endpoint protection and troubleshoot CrowdStrike agents Document incidents and provide recommendations for improvement Stay updated on cyber threats and phishing trends Requirements CCFR and CCFH certifications Strong experience with Splunk or other SIEM platforms Experience in phishing analysis and incident response Ability to create and optimize detection rules Analytical, detail-oriented, and collaborative Experience with Defender for O365 is a plus We Offer Long-term B2B cooperation Remote work environment Modern security tools and international projects