root@lazaro:~$ UPTIME: 99.9% — AVAILABLE FOR PROJECTS
AVAILABLE FOR CONSULTING

Lázaro M. Fuentes

Your automation system is probably losing money right now.
You just can't see where. I find the gap between your field hardware and your decisions — and close it.

/*
 * Field-to-cloud engineer. 4+ years in high-stakes infrastructure.
 * Airport logistics · Runway control · Fuel custody · BMS
 *
 * I don't just commission panels.
 * I architect the data layer that turns field signals
 * into operational intelligence (L0 → L3).
 */
Lázaro M. Fuentes — Systems Architect
SIEMENS TIA PORTAL C# / .NET MQTT / UNS INFLUXDB GRAFANA IEC 61508 DOCKER

Project Evolution

[GET] /api/deployments?sort=chronological
L0: FIELD HARDWARE → L1: PLC LOGIC
2021 – 2024
Baggage Handling System SCADA interface — conveyor and sortation control Corporate Logistics Campus · CDMX

Baggage Handling Systems

Co-led the full hardware/software overhaul of a high-throughput logistics operation serving a major corporate campus in Mexico City. Identified three interlock sequences responsible for the majority of fault events — refactored in TIA Portal with zero hardware replacement and zero production stoppage.

+25% THROUGHPUT SIEMENS TIA PORTAL
L1: PLC → L2: SCADA
2022 – 2024
Airfield Lighting Control Management System SCADA interface Airport Management Company · Cuba

Airfield Lighting (ALCMS)

Full SCADA implementation for runway lighting control across multiple airports. Achieved 100% ICAO/FAA compliance and zero-downtime commissioning — operations never interrupted during go-live.

ZERO DOWNTIME
L0: FIELD → L1: SAFETY LOGIC
2022 – 2024
Airport Management Company · Cuba

PBB & Fuel Custody

PBB: Refactored gate bridge positioning and safety interlock logic — eliminated repeat faults without replacing hardware.
Jet A-1: Upgraded fuel transfer systems to IEC 61508 safety standards.

−30% PBB DOWNTIME
L0: SENSORS → L1: CONTROL
2025 – 2026
Corporate Real Estate · CDMX

Corporate Sanitation Pumping

Fail-safe redundancy logic for black water pumping stations across a large corporate campus. Dual-path failover with alarm escalation — maintenance team notified before failure, not after.

FAIL-SAFE LOGIC
L1: AUTOMATION → L3: CLOUD
2026 →
Corporate Facilities · CDMX

Corporate BMS Architecture

Designing a scalable Building Management System connecting HVAC, lighting, access, and energy metering into a single operational view — reducing energy spend and eliminating manual reporting.

CURRENT FOCUS
L2: SCADA → L3: ENTERPRISE

Event-Driven Unified Namespace

Prototype UNS architecture based on MQTT and event-driven principles. Decouples field hardware from application layer — any consumer subscribes to any data source without point-to-point integration contracts.

UNS · BMS-LITE
L0: ESP32 → L3: GRAFANA IoT pipeline dashboard — ESP32 to Grafana via Node-RED and InfluxDB

IT/OT FOSS Pipeline

ESP32 → Node-RED → InfluxDB → Grafana. Full open-source stack with MQTT broker, time-series storage, and live dashboards.

OPEN SOURCE
L2: DRIVER → L3: APPLICATION
.NET 10

Industrial .NET Libraries

Refactoring industrial comms libraries (Modbus TCP) into .NET 10 using async/await and event-driven patterns for high-performance, non-blocking PLC communication drivers.

ASYNC ARCHITECTURE

Professional Log

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APR 2025 — PRESENT
Independent Consultant
GRUPO SIA
Architecting intelligent IoT solutions and BMS/HVAC integrations. Focused on energy efficiency, firmware optimization, and field-to-cloud data pipelines for corporate facilities.
2023 — 2024
Co-Founder & Lead Engineer
AUTÓMATA SRL
End-to-end delivery of automation solutions — from technical proposals and CAPEX scoping through panel manufacturing and final commissioning.
2021 — 2024
Airports Automation Specialist
ECASA
Managed CAPEX/OPEX lifecycles for critical airport infrastructure. BHS throughput +25%. PBB downtime −30%. ALCMS zero-downtime commissioning across multiple airports.
// WHAT I ACTUALLY DO

I help you understand
what your systems are doing —
and what they could.

I'm an automation consultant, not a vendor. I don't sell equipment or lock you into a platform. I come in, look at what you have, tell you honestly what's working and what isn't, and help you decide what's worth fixing.

// COMMON SITUATIONS I WORK WITH
  • HVAC running on fixed schedules regardless of occupancy — energy spend with no visibility into whether it's justified
  • Equipment from different brands (Siemens, Schneider, Honeywell) that don't share data — staff compensating with manual checks
  • No real-time view of the building — energy, temperature, equipment status only visible after something goes wrong
  • PLC logic that hasn't been touched in years — faults repeat, nobody knows why
  • Alarms that fire constantly — operators ignore them because they can't tell urgent from noise
// RESULTS FROM REAL ENGAGEMENTS
+25%
Throughput recovered
Corporate logistics campus, CDMX — zero hardware spend
−30%
Unplanned downtime reduced
Airport management company — logic refactoring only
0
Production stoppages at go-live
Multi-site SCADA rollout across critical infrastructure
Free Audit Call
A 30-minute conversation. You walk me through your operation, I ask questions, and I give you an honest read on whether there's something worth investigating further. No preparation needed. No commitment after.
  • I'll tell you if there's nothing to fix
  • If there is, you'll understand roughly what it's costing
  • No pitch, no follow-up pressure
Book the Call →
Consultancy
A structured review of your systems — on-site or remote. I map what you have, identify where the gaps are, and give you a written report with prioritized recommendations. You decide what to act on.
  • On-site walkthrough or remote session
  • Written gap analysis with clear findings
  • Prioritized action list with rough cost/benefit per item
  • No implementation pressure — the report stands on its own
Request Consultancy →
Technical Proposal
If the consultancy identifies something worth building, I write a scoped proposal — clear deliverables, fixed fee, defined timeline. You know exactly what you're getting before any work starts.
  • Detailed scope of work
  • Fixed-fee pricing — no open-ended engagement
  • Full documentation and handover at the end
  • Your team runs it after delivery — no ongoing dependency
Request a Proposal →

How It Works

// straightforward. no lock-in.
01
Free Call
30 minutes. You describe what you have and what's bothering you. I tell you whether I think there's a real problem — and whether I'm the right person to help with it.
02
Consultancy
If it makes sense to go deeper, I do a proper review — on-site or remote — and deliver written findings. You get a clear picture of what's happening and what your options are.
03
Proposal
If you want to act on something, I scope it. Fixed fee, defined deliverables, no surprises. You approve it before anything gets built.
04
Handover
Everything documented. Your team takes ownership. There's no dependency on me after delivery — that's the point.

Start with the free call.

If there's a problem, you'll know after 30 minutes. If there isn't, I'll say so — and that's still useful.

Based in Mexico City · Available remotely worldwide.

Book Free Audit Connect on LinkedIn