Jarian Cottingham

Senior Security Engineer · Microsoft 365 Security

jarianc@proton.me git.jarianc.com/jarianc Florence, MS — open to remote, hybrid & relocation

Experience

Senior Software Tech Lead, M365 Security

Microsoft · Redmond, WA

  • Served as lead for several projects; two direct reports, with close collaboration with Principal Developers and Project Managers. Worked across Windows, OneDrive, and M365 Security.
  • Deployed and operated security detection & mitigation tooling across 2.5M+ machines for all Office partners.
  • Implemented major government and compliance initiatives (MDAV, MISE telemetry) across all Federated/Large partners (2.5M+ machines).
  • ITAR cleared for direct work in US Gov clouds.
  • Head of audits for FedRAMP, SOC 2, TRUST, and BCDR.
  • Owned Task Manager, Performance Monitor, and Windows Troubleshooters while on the Windows team.
  • Owned the RDP experience for ~3M partner machines.
  • Supported RBAC and tenant management for Office machines across multiple clouds (Public, USGov, China, Germany, France).

Project Lead — MasterMind

Remote

  • Applied the IDIOT method to make the product development cycle more compatible with PM workflows — build products from design specs and project proposals leveraging local LLMs, similar to Claude Code/Aider without the technical requirements.

Founder — API Builder

Remote

  • Built a tool for rapidly creating and iterating over REST backends for websites (Python / Flask).
  • Employed seven remote interns over the summer to build out the entire product stack.
  • Presented to WashU-sponsored Startup Emporium; received high praise from local startups and founders for speed of execution and remote team collaboration.

Skills

LLMsClaude, GPT, Gemini, Llama, Qwen, Gemma, DeepSeek
C#Office 365 Security, OneDrive, Newtonsoft
AzureClassic VMs, Storage Accounts, Key Vault, Entra ID, Kubernetes, Docker
PythonPyTorch, Matplotlib, Kivy, Raspberry Pi, Django, Flask, BeautifulSoup
C/C++Windows, Task Manager, Performance Monitor, Troubleshooting
LinuxDocker, Ubuntu Server, Fedora
AdobePhotoshop, Illustrator, Bridge, Lightroom, InDesign

Education

B.S. in Engineering — Major in Computer Science

Washington University in St. Louis · School of Engineering and Applied Sciences