Securing the Digital Frontier.
Hello! I'm Caleb Grossnickle, a dedicated Cybersecurity Analyst based in Iowa. Currently operating as a Cybersecurity Analyst II at StoneX, I specialize in threat hunting, incident response, and securing complex network environments using modern XDR and SIEM solutions.
Beyond the screen, I’m passionate about serving my community and exploring new ways to work with technology. I volunteer at my local church as a production coordinator for Cornerstone Recovery, a role that has sparked a fun side-journey into learning audio engineering. When I'm unplugged from the homelab, you can usually find me hitting the local disc golf courses, cheering loud for the Iowa State Cyclones, or kicking back with a great piña colada.
I invite you to explore my career timeline, check out my community involvement, or reach out securely.
Core Competencies
The work I do day to day and where I've proven it.
Strategic Concepts
Technical Domains
Field Notes
Thoughts, homelab experiments, and updates straight from my terminal.
Career & Certifications
Cybersecurity Analyst 2
StoneX | Sep 2024 – Present
- Investigate and respond to enterprise security incidents by correlating telemetry across EDR, SIEM, SOAR, email security, and threat intelligence platforms.
- Help develop and tune an in-house AI security analyst that automates Tier 1 and Tier 2 alert triage.
- Tuned detections and alert logic during an enterprise SIEM migration.
- Write KQL queries for threat hunting and investigations.
- Coordinate tabletop exercises and maintain incident response playbooks and analyst standard operating procedures.
Cybersecurity Analyst
Combined Systems Tech | Oct 2023 – Sep 2024
- Deployed 1,300+ XDR agents and led the cutover from legacy antivirus across client environments.
- Recovered a client from a ransomware incident within 3 days.
- Rolled out phishing-resistant MFA, passkeys, and conditional access for every managed client.
- Performed PCI, cyber insurance, and security audits; wrote policies aligned to NIST and the CIS Controls.
- Managed 3rd party SIEM solutions and handled incident response operations for customers.
- Implemented NIST risk management framework to better secure customer environments.
- Wrote standard operating procedures for all alerts.
EDR Support Analyst
State of Iowa OCIO | May 2023 – Oct 2023
- Supported the EDR rollout across Iowa county systems and maintained relationships with all 99 counties.
- Presented the EDR rollout strategy to the Iowa State Association of Counties.
- Established a communication plan for EDR deployment, ensuring clear and effective communication with counties and agencies throughout the implementation process.
- Collaborated with technical teams to troubleshoot and resolve any issues during the configuration and operation of EDR solutions.
Cybersecurity Intern
State of Iowa OCIO | Dec 2020 – May 2023
- Helped stand up an Information Sharing and Analysis Center (ISAC) for state and county partners.
- Supported the EDR modernization project and ran vulnerability scans on state systems.
- Deployed and debugged state security devices while assisting in revising the incident response program.
StoneX
- Investigate and respond to enterprise security incidents by correlating telemetry across EDR, SIEM, SOAR, email security, and threat intelligence platforms.
- Help develop and tune an in-house AI security analyst that automates Tier 1 and Tier 2 alert triage.
- Tuned detections and alert logic during an enterprise SIEM migration.
- Write KQL queries for threat hunting and investigations.
- Coordinate tabletop exercises and maintain incident response playbooks and analyst standard operating procedures.
Combined Systems Technology
- Deployed 1,300+ XDR agents and led the cutover from legacy antivirus across client environments.
- Recovered a client from a ransomware incident within 3 days.
- Rolled out phishing-resistant MFA, passkeys, and conditional access for every managed client.
- Performed PCI, cyber insurance, and security audits; wrote policies aligned to NIST and the CIS Controls.
- Managed 3rd party SIEM solutions and handled incident response operations for customers.
- Implemented NIST risk management framework to better secure customer environments.
- Wrote standard operating procedures for all alerts.
Office of the Chief Information Officer
- Supported the EDR rollout across Iowa county systems and maintained relationships with all 99 counties.
- Presented the EDR rollout strategy to the Iowa State Association of Counties.
- Established a communication plan for EDR deployment, ensuring clear and effective communication with counties and agencies throughout the implementation process.
- Collaborated with technical teams to troubleshoot and resolve any issues during the configuration and operation of EDR solutions.
Office of the Chief Information Officer (Intern)
- Helped stand up an Information Sharing and Analysis Center (ISAC) for state and county partners.
- Supported the EDR modernization project and ran vulnerability scans on state systems.
- Deployed and debugged state security devices while assisting in revising the incident response program.
Community & Serving
Dedicated to giving back through technical production and ministry coordination.
Cornerstone Recovery
Production Team Coordinator | Oct 2023 – Present
- Serve as the production team coordinator.
- Mix live music for services.
- Coordinate and schedule the worship team for services.
Cornerstone Church of Ames
Production Team Technician | Aug 2022 – Present
- Serve as production team technician for city and campus ministries.
- Help the church respond to and recover from IT security issues.
Get In Touch
Whether you have a security inquiry, a networking opportunity, or just want to connect, feel free to reach out.