SENTINELRESEARCH GROUP

INDEPENDENT SECURITY RESEARCH & ENGINEERING

Offensive insight.
Defensive purpose.

Deep systems research.
Networks engineered for resilience.

Sentinel Research Group works at the intersection of vulnerability discovery, secure network architecture, and defensive engineering—investigating platform trust boundaries, building detection tools, and publishing the research behind the work.

Explore the research View GitHub
Sentinel Research Group emblem: a helmet and shield surrounded by circuitry
SENTINEL RESEARCH GROUPRICHLAND, WA
VULNERABILITY RESEARCHNETWORK SECURITYDETECTION ENGINEERING

01 / FEATURED RESEARCH

Trust is a system property.
Test the assumptions.

Published research · 2026

CVE-2026-84589 / macOS TCC

Application identity.
Privacy permissions.
The boundary between them.

An original macOS TCC investigation into the relationship between application identity, stored privacy permissions, and runtime access to protected capabilities. The work examines a critical trust boundary in desktop operating-system security.

Apple credited Isaiah Ryan Ehlert alongside other researchers for CVE-2026-84589. Explore the firsthand technical analysis, documented findings, and coordinated disclosure record.

Read the research Apple advisory

02 / SELECTED ENGINEERING

Built to observe.
Engineered to respond.

Code, instrumentation, and systems thinking
behind the security research.

DETECTION ENGINEERING / PUBLIC PROJECT

Sentinel Security Dashboard

A working detection platform that converts simulated attack telemetry into observable security signals. Python and FastAPI power detection of SSH brute-force patterns, takeover sequences, and HTTP traffic bursts, presented through a live dashboard.

  • Python
  • FastAPI
  • JavaScript
  • Detection logic
Explore Cyber-Ops Lab

SOFTWARE ENGINEERING / PUBLIC REPOSITORY

Data Annotation Management Service

A containerized REST API engineered around the complete annotation lifecycle: project and task management, relational data models, validated submissions, workflow transitions, and aggregated statistics backed by automated tests.

  • FastAPI
  • SQLAlchemy
  • Docker
  • PyTest / CI
Explore the service

03 / RESEARCH PUBLICATIONS

Inside the stack.
Across the attack surface.

Research archive
01

NETWORK SECURITY / REFERENCE ARCHITECTURE

Operation Impreavanti

A blueprint for a local-first security fusion center integrating Tailscale access controls, Pi-hole and dnscrypt-proxy, structured telemetry, evidence provenance, and dedicated GPU-assisted analysis. Security boundaries are designed into the architecture.

OCT 2026
REVISION 2.0
02

MOBILE SECURITY / TECHNICAL ASSESSMENT

GrapheneOS on Google Pixel 8a

An engineering-level assessment of GrapheneOS on Pixel 8a: exploit mitigations, hardened memory defenses, application sandboxing, verified boot, attestation, and the threat models behind mobile device security.

OCT 2026
REVISION 1.0
03

MOBILE SECURITY / TECHNICAL ASSESSMENT

iPhone 16, Lockdown Mode & device management

An architecture-level examination of iPhone Lockdown Mode, Apple Business-backed device management, certificate trust, administrative authority, and attack-surface reduction in hardened iOS configurations.

OCT 2026
REVISION 1.0

04 / CURRENT INVESTIGATIONS

The next research frontier.

Current work spans embedded systems, network appliances, application attack surfaces, and defensive infrastructure. Selected findings move into the public record after technical validation and responsible disclosure.

  • 01 Embedded system security
  • 02 Network appliance assessment
  • 03 Defensive infrastructure development

05 / ABOUT

Independent research.
Serious engineering.

Isaiah Ryan Ehlert

Owner · Sentinel Research Group
Richland, Washington

Sentinel Research Group brings offensive security thinking to defensive systems engineering. The work spans operating-system trust boundaries, network security architecture, telemetry-driven detection, security automation, and technical research.

The work is open to inspection: public code, technical publications, architecture studies, and vulnerability disclosure records provide a direct path from bold ideas to documented engineering.

Professional development

  • Google Cybersecurity Certificate
  • Google IT Support Professional Certificate
  • CompTIA A+
  • B.S. Cybersecurity & Information Assurance, WGU — in progress
View credentials & coursework

06 / CONTACT

Bring the hard
security problems.

For research collaboration, authorized security engineering,
or coordinated vulnerability disclosure.

GitHub / isaiahehlert