Senior Security Incident Response Engineer

At Block, security is a collective responsibility. The mission of our Information Security team is to protect Block, our employees, and our customers while enabling rapid, secure innovation. The Detection and Response Team (DART) is critical in achieving this mission, encompassing five specialized teams: Threat Intelligence and Operations (TIO), Monitoring & Triage (M&T), Signals and Intelligence (SIGINT), Privacy Incident Response Team (PIRT), and Computer Security Incident Response Team (CSIRT).

The CSIRT is dedicated to providing immediate, effective responses to incidents involving information security or privacy within our ecosystem. Specializing in minimizing damage, preserving evidence, facilitating swift recovery, and advising on preventive measures, CSIRT/PIRT is crucial in maintaining the security and privacy of our information systems.

We are seeking a Senior Security Incident Response Engineer who is passionate about making a broad impact, solving complex problems, and collaborating to enhance our security posture.

As a Senior Security Incident Response Engineer you will:

• Lead the response to critical security and privacy incidents, threats, and vulnerabilities, coordinating cross-functional teams to resolution.
• Demonstrate strong composure (Incident Command) while managing incidents with a balance of urgency, intensity, and focus.
• Actively monitor, analyze, and correlate activities, evaluate security events, conduct research, and provide in-depth incident analysis.
• Improve and automate internal capabilities for identifying, investigating, and responding to security events.
• Contribute to the creation and refinement of incident response runbooks.
• Lead and participate in incident response tabletop exercises to validate processes, document lessons learned, and enhance procedures.
• Develop and adjust automations, scripts, and security tool configurations to drive efficiencies and enhance investigations.
• Hunt for malicious activity and provide feedback to the threat intelligence and signal development teams.
• Communicate incident details clearly and concisely to key stakeholders, both technical and non-technical, in written and verbal forms.
• Create After Action Review (AAR) reports and lead AAR discussions.
• Participate in an on-call rotation.

Requirements

You have:

• 6+ years of experience with incident response and forensics tools.
• Strong security knowledge in at least one of the following domains: AWS, Google Cloud Platform, Linux, macOS, or Windows.
• 3-5 years of experience with malware analysis, host/network-based forensics, memory forensics, and/or network traffic analysis.
• Proficiency in using the MITRE ATT&CK framework to enhance security incident detection and response.
• Proficient with leading security investigations with privacy implications (e.g. GDPR, SEC, FDIC, EU or AU reporting) or other strict data protection laws.
• Scripting experience (e.g., Ruby, Python, shell scripting) preferred.
• Experience with open-source forensics tools like OSQuery or YARA.
• Empathy, patience, a desire to learn, and a commitment to helping your teammates grow.
• Excellent written and verbal communication skills, with the ability to clearly and effectively convey technical concepts.
• Ability to operate both independently and as part of a geographically dispersed team.