Calvin Hilsinger

Professional Experience

• Cloud IAM & Resource Management: Troubleshoot and resolve critical onboarding and resource-harvesting failures within InsightCloudSec by auditing complex IAM roles, service policies, and cross-account permissions.
• Cloud Log Analysis: Analyze AWS CloudTrail and internal log management telemetry to identify the root cause of cloud provider errors and harvester failures.
• Vulnerability & Systems Diagnostics: Analyze InsightVM log packages to diagnose console performance bottlenecks, scan engine connectivity failures, and authentication errors involving WMI, CIFS, SSH, and the InsightVM Scan Assistant.
• API Troubleshooting: Debug REST API requests using cURL and Postman to verify endpoint functionality and authentication headers; provide architectural guidance on selecting appropriate API calls for automation and reporting workflows.
• Vulnerability Validation: Correlate InsightVM check logic with NIST/NVD databases and official vendor documentation to validate detection accuracy and investigate false positives.
• Production Environment Management: Modify customer production environments via Git and Terraform to implement feature flags and resolve deployment-specific issues.
• Engineering Liaison: Partner directly with Product Engineering to translate enterprise customer requirements and bug reports into actionable code fixes via Jira.

Technical Skills

Projects

• Designed a multi-node network using managed switches, implementing VLANs and firewall rules for subnet isolation.
• Deployed CrowdSec and GeoIP for proactive threat blocking and WireGuard for secure remote access; hosted containerized services on Ubuntu 24.04 LTS using Docker.

• Built and deployed a FastAPI application on AWS EC2 to parse HTTP responses into JSON, implementing a flat-file caching system.
• Authored unofficial documentation for the USF Staff Schedule Search to improve community tool accessibility.

• Developed a Python automation script with Discord Webhook integration for real-time seat availability notifications.

Education

Leadership & Organizations

• Founded and led a student organization focused on IBM Mainframe technologies; hosted Open Mainframe Summit at USF and managed USF's participation in IBM zDay.