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Tim Fletcher

@timfletcher

IT Support & Security Analyst at Upstate Medical University who automated Sentinel response, cutting triage to ~12 seconds.

United States
Message

At Upstate Medical University, I provide Tier 1 support for clinical and administrative staff, resolving hardware, software, and account-access issues. I administer Active Directory and Microsoft 365 access under least privilege and document incidents through resolution or escalation.

In my self-built Azure honeypot lab, I sent Windows RDP, Cowrie SSH, and Endlessh activity to Microsoft Sentinel and captured 1.24 million attack attempts from 75 IPs in 37 hours with zero compromises. I wrote KQL analytics rules and reconstructed an SSH intrusion chain, mapping techniques to MITRE ATT&CK.

I built a Sentinel Logic App playbook that enriches incidents with AbuseIPDB and uses the Azure REST API to block high-risk IPs in an NSG. It cut triage to about 12 seconds on average, compared with 10–15 minutes manually.

I also provisioned a portfolio site with Terraform, Azure, Cloudflare, and GitHub Actions, using OIDC federation rather than stored credentials. My projects draw on my B.A. in Information Science and ISC2 Certified in Cybersecurity credential.

Experience

Work history, roles, and key accomplishments

UU
Current

Help Desk Analyst

Upstate Medical University

Oct 2025 - Present (1 year)

Provide Tier 1 support by phone and ticketing system, triaging and resolving hardware, software and account-access issues for clinical and administrative staff. Administer Active Directory accounts and permissions and Microsoft 365/Outlook access under least privilege.

Education

Degrees, certifications, and relevant coursework

TryHackMe logoTR

TryHackMe

Labs, Cybersecurity

Ongoing labs in networking, Linux, and defensive security.

ISC2 logoIS

ISC2

Certified in Cybersecurity (CC), Cybersecurity

Certified in Cybersecurity (CC) in July 2025.

State University of New York at Oswego logoSO

State University of New York at Oswego

Bachelor of Arts, Information Science

Earned a Bachelor of Arts in Information Science with coursework in cybersecurity, networking, systems analysis, and databases.

TE

TestOut

Security Pro, Security

Earned the TestOut Security Pro certification.

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