🎯 Systems Engineer — Microsoft 365, Active Directory, networking, cybersecurity, systems integrations, automation, and AI tooling.
📍 San Antonio, TX
📧 me@markandrewmarquez.com

🌐 Portfolio Website | 💼 LinkedIn | 🐙 GitHub

Systems Engineer who works cross-functionally to find the real problem, then builds the systems integrations, automations, and data dashboards that boost team productivity — increasingly AI-enabled. Years in the weeds across Microsoft, networking, cloud, and security, partnering with teams and customers to capture the domain knowledge that turns a vague problem into a high-value solution.

🧰 What I do:

• Troubleshooting, Diagnostics & Documentation — Log analysis, packet captures with Wireshark, API debugging with curl, browser DevTools, and SQL debug to isolate root cause across messy real-world stacks — then document so the fix sticks and scales the team. I shipped api-medic — an HTTP API diagnostic tool, available as a web app, a Chrome extension, and a CLI.
• Systems Integrations & Automation — Python, PowerShell, Bash, and SQL with REST APIs, webhooks, and SSO wiring services together; Terraform for infrastructure as code. Measurable hour-reductions on real workflows.
• Data Dashboards & Data Engineering — Data dashboards and refactored SQL so teams get real visibility, plus data engineering and enhancement that turn raw, messy sources into clean, decision-ready datasets.
• Systems & Cloud — Windows and Linux, Microsoft 365 via Graph API, Azure and AWS; provision and automate Active Directory, identity in Entra ID / Auth0, and observability with CloudWatch.
• Networking & Cybersecurity — TCP/IP, DNS, DHCP, VLANs, VPNs (WireGuard / OpenVPN), Ubiquiti UniFi; hardening with SIEM/EDR, MFA, IAM, threat intelligence, virtualization, and backups.
• AI Agents & Workflows — Building LLM-driven tooling across the stack: a stateful LangGraph agent (TARS) that runs multi-turn conversations into Salesforce, M365 admin assistance over Microsoft Graph, a self-improving intake-form extraction pipeline with model cascade and eval harness, LLM-enriched threat-intel ETL, and a real-time fleet ops console that triages anomalies with Agentforce.

Troubleshooting & Diagnostics:

Programming & Scripting:

Microsoft Ecosystem:

Networking & Infrastructure:

Cloud Platforms & Tools:

Cybersecurity:

AI & Agents:

• aerial-fleet-monitor — Real-time aviation fleet operations console. Ingests public US flight telemetry, detects anomalies as Salesforce Cases, triages them with Agentforce, and surfaces operations through a Foundry-hosted dashboard.
• intake-form-ai-pipeline — Self-improving intake-form extraction pipeline with a three-tier model cascade, BAA-aware routing for PHI handling, and an eval harness that demonstrates F1 improvement over time.
• salesforce-langgraph-ai-lead-bot — End-to-end AI lead qualification system. A LangGraph stateful agent (TARS) runs multi-turn conversations over SSE, scores prospects deterministically, and writes enriched Leads to Salesforce — where an Agentforce agent drafts follow-up tasks, emails, and opportunities. Powers the chat assistant on my portfolio.
• m365-guardian — Diagnoses and remediates common M365 admin issues (password resets, MFA enforcement, license drift, dormant accounts) via Microsoft Graph. Includes a weekly automated security health report with 10 checks.
• api-medic — An HTTP API troubleshooting tool. Takes a URL, HAR file, or curl command and runs network, TLS, auth, and protocol checks, producing a structured report with plain-language findings and suggested fixes. Live as a web app, a Chrome extension, and a CLI.
• cloudwatch-monitor — Multi-endpoint AWS synthetic monitoring with per-endpoint alarms, SNS alerts, and a public status page. Fully managed via Terraform.
• Threat-Intel-ETL — Automated ETL pipeline for AlienVault OTX threat intelligence. Extracts IoCs, transforms with Pandas, loads into PostgreSQL, visualizes in Splunk dashboards, and generates deeper insights using Grok and Claude.

📂 Full project list: Repositories · 🌐 Case studies & writeups: markandrewmarquez.com/#portfolio

Happy to talk systems integration, automation, data dashboards, Microsoft 365 and Active Directory, or putting AI to work where it earns its place in the workflow.

📧 Email: me@markandrewmarquez.com
💼 LinkedIn: linkedin.com/in/markandrewmarquez
🌐 Website: markandrewmarquez.com

🚀 "Find the real problem. Build the AI-enabled solution."