Zero Trust & IEC 62443: The New Rules of Engagement for OT Security
The air gap is a myth. Here is how to secure your connected factory using the IEC 62443 framework and Zero Trust principles.
Industrial Automation & IIoT Engineering

Engagement Models
Each engagement is scoped around specific outcomes—not billable hours.
Connect existing PLCs and equipment to modern data infrastructure without replacing functional hardware.
Deliverable: Operational dashboard + technical documentation.
End-to-end infrastructure design from shop floor sensors to cloud analytics platforms.
Deliverable: Network topology, hardware specifications, MQTT broker configuration.
Code review, architecture assessment, or debugging support for PLC, SCADA, or integration projects.
Format: Hourly or fixed-scope engagement.
About
Most manufacturing facilities have valuable data locked in disconnected equipment. My focus is bridging that gap—connecting operational technology to information systems so teams can act on real-time insights.
I prioritize clear communication, thorough documentation, and solutions designed for your team to own and maintain independently.
Siemens S7-1200/1500, Allen-Bradley ControlLogix, Mitsubishi FX/Q, WAGO, ABB, IIoT Gateways.
MQTT/Sparkplug B, Modbus TCP/RTU, OPC UA.
Node-RED, Ignition, Python, SQL, Docker.
Partnership Approach
One partner handling PLC logic, SCADA development, and cloud integration means fewer handoffs and faster delivery.
Architectures designed to scale—add production lines, facilities, or analytics capabilities without rebuilding from scratch.
Every project includes documentation, training, and support so your team operates the system with confidence.
Fault-tolerant logic, OT cybersecurity best practices, and proactive monitoring keep your operations resilient.
Step 1: Discovery & Assessment
We map your processes, critical equipment, and existing infrastructure to understand objectives, constraints, and data requirements.
Step 2: Architecture & Design
I design the control logic, network topology, data models, and security layers that will deliver reliable, contextualized information.
Step 3: Implementation & Commissioning
PLC code, SCADA interfaces, and edge gateways are developed, tested, and deployed in coordination with your operations team.
Step 4: Handover & Support
I train your staff, deliver complete documentation, and provide ongoing support to ensure sustained value.

Technical Methodology
A structured approach to capturing, processing, and delivering industrial data where it creates value.
Connect to PLCs, sensors, and legacy controllers without disrupting production.
Normalize, aggregate, and validate data at the edge before transmission.
Publish data via MQTT/Sparkplug B with proper authentication and encryption.
Connect to AWS IoT, Azure IoT, or GCP for storage, analytics, and enterprise applications.
Build operator HMIs and management dashboards with actionable KPIs and configurable alarms.
Provide documentation, training, and continuous improvement as your needs evolve.
Practical guidance on PLC programming, IIoT architectures, industrial protocols, and manufacturing data strategies.
The air gap is a myth. Here is how to secure your connected factory using the IEC 62443 framework and Zero Trust principles.
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FAQs
Common questions about working together on automation and IIoT projects.
I work with Siemens (TIA Portal), Allen-Bradley (Studio 5000), Mitsubishi (GX Works), ABB, and CODESYS-based systems. Mixed environments are common—I adapt to your existing standards and documentation practices.
Typical scope includes edge gateway configuration, MQTT/Sparkplug B setup, OT network segmentation, data modeling, cloud ingestion, visualization dashboards, and team training.
Yes. Every engagement includes structured documentation, version-controlled code, and training sessions so your engineers can maintain and extend the system independently.
I apply defense-in-depth principles: secure credential management, encrypted communications, network segmentation, and fault-tolerant logic with redundant data paths where appropriate.
I'm based in Argentina (UTC-3) and work remotely with clients across the Americas. I communicate fluently in English and Spanish, aligning with your preferred tools and schedules.
Yes. I remain available for monitoring, system updates, feature additions, and strategic consulting as your automation and IIoT capabilities mature.
What manufacturing teams say about working together.
" Eduardo is an exceptional PLC programmer! He expertly handled our ABB AC500 V3 CODESYS project for a complex concrete curing system. His logic was robust, well-documented, and delivered on time. "
Client via Upwork
PLC Programming for Concrete Curing System
" Fantastic work from Eduardo on our PLC to Cloud MQTT gateway! He flawlessly developed the MQTT gateway connecting our PLC to the cloud. His deep understanding of MQTT and industrial protocols was evident. "
Client via Upwork
PLC to Cloud MQTT Gateway Project
" We are thrilled with the ThingsBoard HMI/SCADA system Eduardo developed. His technical proficiency with GCP, Kubernetes, and MQTT, combined with excellent communication throughout the project, made this complex upgrade seamless. "
Client via Upwork
HMI/SCADA Upgrade (ThingsBoard & Cloud)
Whether you need to integrate a single PLC, modernize your SCADA system, or build a plant-wide data infrastructure, I'm here to help you achieve operational visibility.