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4R9UN/README.md

⚡ Executive Summary

Arjun Trivedi Portrait
Arjun Trivedi
@4R9UN

Executive Security Research, Applied Science & Agentic AI Leader with 12+ years in cybersecurity and 7+ years at Microsoft. I lead global Security Research & Applied Science teams at Microsoft—combining executive people leadership, organizational strategy, and mentorship with deep hands-on technical architecture to invent and ship breakthrough Agentic AI, Production MCP Servers, Vibe Research Platforms, and autonomous defense solutions across product engineering, data science, SOC operations, and enterprise customers.

My work sits at the intersection of Autonomous Security Agents (MCP / Multi-Agent Reasoning), AI Red Teaming & Guardrails, Forward-Deployed Enterprise Execution (FDE), and Planet-Scale Detection Engineering & Applied ML—turning complex nation-state, multi-cloud, and AI security challenges into shipped Microsoft capabilities (Project Perception, Security Copilot) protecting 1,000+ enterprises and 100M+ users across 150 countries.

🧠 Architecture Blueprint: Autonomous Agentic Defense & MCP Pipeline

Agentic Security Architecture & MCP Grounding Pipeline

⚡ Run This Agentic Security & MCP Stack in 60 Seconds

Every stage in the architecture diagram above maps directly to shipped, open-source repositories in this GitHub profile, verified PyPI packages, and live sandboxes:

1️⃣ Stage 1 & 2 — Install Schema-Grounded NL2KQL & Threat-Intel MCP Servers

pip install mcp-kql-server fastmcp-threatintel

Add both verified MCP servers to your Claude Desktop, GitHub Copilot CLI, Cursor, or VS Code mcp-config.json:

{
  "mcpServers": {
    "kql-sentinel": {
      "command": "python",
      "args": ["-m", "mcp_kql_server"],
      "env": { "AZURE_CORE_ONLY_SHOW_ERRORS": "true" }
    },
    "threatintel-cti": {
      "command": "fastmcp-threatintel",
      "env": {
        "VIRUSTOTAL_API_KEY": "YOUR_VT_KEY",
        "OTX_API_KEY": "YOUR_OTX_KEY",
        "ABUSEIPDB_API_KEY": "YOUR_ABUSE_KEY"
      }
    }
  }
}

2️⃣ Stage 3 — Multi-SIEM Autonomous Investigation (ASRS) & Bounded Agent Harness (Assured-Arc)

git clone https://github.com/4R9UN/Assured-Arc.git
pwsh -File .\Assured-Arc\scripts\install.ps1 -Profile full -Target both

🏛️ Three Signature Leadership Pillars

01 // Agentic AI & AI Security Architecture

  • Microsoft Project Perception: Contributed research and threat-hunting agent capabilities applying organizational context, detection intelligence, and evidence-grade reasoning with human oversight.
  • Microsoft Security Copilot (+35% Accuracy): Engineered retrieval-augmented threat summarization and optimized context, token, and vector grounding to lift reported analyst accuracy by 35%.
  • AI Red Teaming & Guardrails: Lead hands-on assessments for prompt injection, jailbreaks, unsafe tool invocation, authorization boundary failures, indirect instruction attacks, and excessive agency.
  • Official MCP Ecosystem: Creator of Official MCP Registry & MseeP-verified servers (mcp-kql-server v2.1.5, fastmcp-threatintel v0.2.7), ASRS, and Assured-Arc.

02 // AI Forward Deployed Engineering (FDE)

  • 50+ Global Enterprise Escalations (+20% CSAT): Partner directly with enterprise CISO & SOC teams to resolve critical SIEM, EDR/XDR, and AI security bottlenecks, converting customer field evidence into product roadmap priorities.
  • 1,000+ Enterprise Adoptions: Co-created and shipped Multi Cloud Attack Coverage Essentials for Microsoft Sentinel, translating cross-cloud threat research into deployable analytics.
  • R&D-to-Production Transfer: Direct proof-of-concept architecture and production handoff across Microsoft Sentinel, Defender XDR, and Security Copilot.
  • Pioneer — Microsoft Threat Experts: Helped design and operationalize Microsoft's on-demand expert response service for human-operated attacks; led the Tier-1 hunting team.

03 // Detection Engineering & Applied ML at Scale

  • 200+ KQL Detections (-50% MTTR): Architected cross-domain detections and correlation rules across Sentinel & Defender XDR covering identity threats, AiTM phishing, UEBA, cloud abuse, and advanced persistence.
  • Production ML Models (-30% False Positives): Developed and validated Random Forest, Gradient Boosting, Isolation Forest, and One-Class SVM models on high-volume security telemetry.
  • Blue-Team Automation (-60% Effort): Built 20+ Python, Jupyter & MSTICPy automation assets for hunting, enrichment, and YARA generation.
  • Deep Reverse Engineering Roots: Former Malware Analyst (Wipro) & Threat Researcher (Sophos) protecting 100M+ users across 150 countries.

🔄 AI Forward Deployed Engineering (FDE) Execution Flywheel

AI Forward Deployed Engineering Execution Flywheel

🚀 Flagship Production Systems & Open-Source Arsenal

System / Repository Category & Verification Architecture & Measurable Capabilities Links
ASRS — Autonomous Security Reasoning System Multi-Agent SIEM · TypeScript · MCP Unified autonomous investigation platform spanning Microsoft Sentinel, Splunk, Elastic Security & CrowdStrike Falcon. Specialized Triage, Deep Analysis, and Verdict agents correlate alerts, entities, evidence timelines, confidence scores, and MITRE ATT&CK mappings. 🔴 Live Demo · Repo
mcp-kql-server PyPI v2.1.5 · Official MCP Registry · MseeP Verified Production MCP server for schema-grounded NL2KQL, strict query validation & auto-repair, semantic schema memory, secure Kusto execution, visual analysis, and Azure Container Apps deployment via Managed Identity & Bicep IaC. 📦 PyPI · Repo
fastmcp-threatintel PyPI v0.2.7 · MseeP Verified · 40★ / 14 Forks AI-ready threat intelligence MCP server integrating VirusTotal, AlienVault OTX, AbuseIPDB & IPinfo with confidence-scored attribution, MITRE ATT&CK mapping, IOC graph relationships, D3.js visualization, and STIX output. 📦 PyPI · Repo
Assured-Arc Multi-Agent Harness · GitHub Copilot · AI Safety Portable multi-agent engineering harness for bounded agent loops, deterministic skill routing, context-isolated disposable subagents, least-privilege MCP safety gates, and automated verification. 🛡️ Explore Harness
Multi-Cloud Attack Coverage & Notebooks 1,000+ Enterprises · Sentinel · Jupyter / KQL Cross-cloud detection engineering and hunting notebooks across Azure, AWS, GCP & Okta; foundation for Microsoft Sentinel's Multi Cloud Attack Coverage Essentials solution (1,000+ enterprise deployments). ☁️ Notebooks · Tech Community
Prompt-Book Privacy-First AI Workspace · TypeScript Structured prompt-engineering workbench for repeatable security investigation workflows, adversarial red-team test cases, and agent prompt evaluation. 📓 Repo

🏆 Recognition, Media & Thought Leadership

  • 🥇 Winner — Microsoft Global Hackathon 2023 (MSTICPy AI Assistant); also served as Hackathon Judge and Microsoft Security Hackathon 2025 innovator.
  • 🎙️ Featured Guest — AZ Security Podcast (Episode 27): Deep dive into mcp-kql-server, schema-grounded NL2KQL, advanced threat hunting, and AI-enabled SOC automation.
  • 📰 Author — MCP KQL Server Newsletter (1,900+ Subscribers) & 15+ Technical Publications: Published across Microsoft Tech Community and Arjun's Cyber Insights, covering practical risks in cybersecurity agents, multi-cloud detections, and agentic defense.
  • 👨‍🏫 Executive Mentorship & Community Builder: Mentored 50+ security engineers and researchers globally across detection engineering, AI security, and threat hunting.

💼 Career Trajectory & Education

  • Microsoft — Senior Security Researcher | Detection Engineering & AI Security (Aug 2020 – Present, Hyderabad, India): Leads global Security Research & Applied Science teams; Project Perception hunting agents; Security Copilot RAG grounding (+35% accuracy); AI Red Teaming; Applied ML (-30% FP); 200+ KQL rules (-50% MTTR); Multi Cloud Attack Coverage Essentials (1,000+ enterprises); 50+ enterprise FDE escalations (+20% CSAT).
  • Microsoft — Cyber Threat Hunter | Microsoft Threat Experts (Mar 2019 – Aug 2020, India): Pioneer member of Microsoft Threat Experts on-demand service; Tier-1 hunting SME lead; cross-platform ML IOC detection pipelines & RE quality governance.
  • Wipro — Malware Analyst (Jun 2017 – Feb 2019, India): Android APK & native library reverse engineering (IDA Pro, Ghidra); PE/non-PE behavioral sandboxes; threat intelligence white papers.
  • Sophos — Threat Researcher (Sep 2014 – May 2017, India): Static/dynamic reverse engineering of bots, worms, ransomware & packed executables; behavioral detections protecting 100M+ users across 150 countries.
  • Early Technical Foundations: Confidential Government Defense Malware-Detection R&D Project (Python automation & exploit PoCs) + Cybersecurity & Programming Instructor.
  • Education & Certifications: M.Sc. in Information Technology (Amity University, 2015–2017) · B.Sc. in Computer Science (IT) (K.R. Doshi Group of CS College, M.K. Bhavnagar University, 2013–2015) · SANS FOR578: Cyber Threat Intelligence · Microsoft SkillUp AI: Applied AI & Responsible AI Development · Cyber Security & Ethical Hacking (Appin Technologies).

🛠️ Executive & Technical Stack

Domain Capabilities & Technologies
Agentic AI & AI Security Multi-Agent Systems · Model Context Protocol (MCP / FastMCP) · RAG & Vector Grounding · NL2KQL · Agent Evaluation · AI Red Teaming (Prompt Injection, Jailbreaks, Tool Abuse, AuthZ Boundaries, Excessive Agency)
Detection & Threat Research Microsoft Sentinel · Microsoft Defender XDR · KQL (200+ production rules) · UEBA · Identity & AiTM Detection · MITRE ATT&CK · Nation-State Campaign Tracking · Malware Reverse Engineering (IDA Pro, Ghidra)
Applied ML & Automation Python · MSTICPy · Jupyter · Random Forest · Gradient Boosting · Isolation Forest · One-Class SVM · YARA · STIX 2.1
Cloud & Production Infra Azure · AWS · GCP · Okta · Splunk · Elastic Security · Azure Data Explorer (Kusto) · TypeScript · FastAPI · Docker · Azure Container Apps · Bicep IaC · Managed Identity
Executive Leadership Global Security Research & Applied Science Org Leadership · Technical Strategy & Roadmap Ownership · Vibe Research Platform Architecture · AI Forward Deployed Engineering (50+ Enterprises) · Research-to-Product Transfer

🌐 Connect & Research Portfolio

Focus Areas: Agentic AI Security & MCP Servers · Detection Engineering & Threat Research · Vibe Research Platforms · Enterprise AI Defense

Visit Executive Portfolio Connect on LinkedIn Email Arjun

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