Available for freelance

Amine Takdjout

OT/IT Engineer · Oil & Gas · Industrial Systems

I bridge operational technology (OT) and information technology (IT) for oil & gas refineries and industrial sites. From PLC/SCADA systems and industrial protocols to secure IT integration and data pipelines, I design, deploy and harden the systems that keep plants running safely and efficiently.

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01

About

With hands-on experience across refinery operations, I understand both the field instrumentation level and the enterprise data layer. My work focuses on reliability, cybersecurity (IEC 62443), and making industrial data useful — without ever compromising plant safety. I work as an independent freelancer and partner with operators, EPCs and system integrators.

Location

Algeria · Remote worldwide

Status

Available for freelance

Focus

OT/IT & Industrial Automation Engineer

02

Skills & Expertise

OT / Automation

  • PLC (Siemens S7, Allen-Bradley, Schneider)
  • SCADA / HMI (WinCC, Wonderware, Ignition)
  • DCS (Honeywell, Yokogawa, Emerson)
  • Safety Instrumented Systems (SIS / ESD)
  • Historian (PI System, Aveva)
  • Field instrumentation & calibration

Industrial Protocols

  • Modbus RTU / TCP
  • OPC UA / OPC DA
  • PROFIBUS / PROFINET
  • HART / Foundation Fieldbus
  • Ethernet/IP, DNP3
  • MQTT / Sparkplug B

IT / Infrastructure

  • Linux & Windows Server administration
  • Networking (VLAN, routing, firewalls)
  • Virtualization (VMware, Proxmox)
  • Databases (SQL, time-series)
  • Docker / containers
  • Python automation & scripting

OT Cybersecurity

  • IEC 62443 / ISA-99
  • Network segmentation (Purdue model)
  • Industrial DMZ design
  • Asset inventory & monitoring
  • Patch & backup strategies
  • Risk assessment & hardening

Oil & Gas / Refinery

  • Refinery process units
  • Tank farm & custody transfer
  • Flow / level / pressure metering
  • P&ID reading & loop checks
  • Commissioning & start-up
  • Plant data integration

Data & Integration

  • OT/IT data pipelines
  • Edge computing / IIoT gateways
  • Dashboards & reporting (Grafana, Power BI)
  • REST APIs & data brokers
  • Cloud connectivity (Azure / AWS IoT)
  • Predictive maintenance basics

03

Selected Projects

01

Refinery SCADA Modernization

Migrated a legacy SCADA system to a redundant, secure architecture with OPC UA connectivity, historian integration and real-time dashboards for operations.

Role

Lead OT engineer

SCADA OPC UA PI System IEC 62443
02

OT/IT Data Bridge & IIoT Gateway

Designed a secure data bridge pushing plant data from Modbus/PLC sources to a time-series database and cloud, via an edge gateway with MQTT Sparkplug B.

Role

Solution architect

Modbus MQTT Docker Grafana Python
03

OT Network Segmentation & DMZ

Implemented a Purdue-model network segmentation with an industrial DMZ, firewalls and monitoring to harden a plant against cyber threats per IEC 62443.

Role

OT cybersecurity lead

Purdue model Firewalls IEC 62443 Monitoring

04

Open-Source Work

Public, runnable code samples on GitHub.

opcua-dotnet-server

OPC UA Sample Server (.NET)

Minimal OPC UA server on the OPC Foundation .NET stack. Exposes Double/Int/Boolean variables updated live — a clean reference for StandardServer + CustomNodeManager2.

C# .NET OPC UA OPC Foundation
View on GitHub →
opcua-nodejs-client

OPC UA Sample Client (Node.js)

OPC UA client with node-opcua: connects, browses the address space to JSON, then subscribes and streams live value changes. Subscription targets are discovered from the browse.

Node.js node-opcua OPC UA Subscriptions
View on GitHub →

05

Let's work together

Have an OT/IT, automation or refinery project? Let's talk.

Email me → takdjout.amine@atec-2000.org