Software Engineer / IT Specialist
Systems Integration · Cloud & APIs · Infrastructure & Security · OT/ICS · AI & Agentic Systems
I work across software development, systems integration, cloud services, network and server infrastructure, industrial technology, cybersecurity, technical documentation, and AI.
My professional work includes application development, API and cloud integration, Linux and Windows systems, networking, industrial HMI/PLC environments, infrastructure modernization, and security-focused engineering projects.
This GitHub profile serves as a portfolio of selected academic and professional projects, with current work presented first.
September 2026 – Present
An ongoing enterprise AI portfolio project focused on building practical experience with AI applications, AI project management, and agentic systems.
The project accompanies a structured certification and professional-development path covering AI fundamentals, Microsoft Azure AI, Microsoft Foundry, AI agents, agentic application development, and AI project management.
Focus:
Azure AI · Microsoft Foundry · AI Agents · Agentic AI · AI Project Management
August 2026
A sanitized OT/ICS cybersecurity case study documenting a protocol-aware firewall designed to inspect Modbus/TCP communications, enforce industrial-network policy, and preserve legitimate control-system traffic.
The project demonstrates inline industrial traffic inspection, protocol-aware enforcement, management-plane separation, system hardening, validation, and repeatable deployment concepts.
Focus:
OT/ICS Security · Modbus/TCP · Suricata · Debian Linux · Network Security · Industrial Cybersecurity
July 2026
A reusable Modbus/TCP simulation appliance designed to provide a controlled PLC endpoint for HMI validation, firewall testing, protocol analysis, and industrial-network experimentation.
The simulator provides a repeatable test environment for industrial communications without requiring continuous access to production PLC hardware.
Focus:
Python · Modbus/TCP · PLC · HMI · Debian Linux · Industrial Automation
August 2025 – December 2025
A cross-functional technical documentation project supporting the development and completion of the Hyspenser-1 IOM and Compressor Manual.
I worked with multiple company employees, coordinated with an India-based documentation team responsible for assembling the manual, participated in revision and review cycles, and served as the final editor on the completed document.
Focus:
Technical Documentation · Technical Editing · Cross-Functional Collaboration · International Team Coordination · Revision Management · Quality Review
December 2024 – June 2025
A software and industrial-systems integration project that replaced a legacy hydrogen fueling-station interface with a new C# WPF HMI and carried it from early requirements through testbench validation, PLC/Modbus integration, commissioning, project recovery, and the first production deployment.
During the final delivery phase, I assumed project responsibility, recruited additional PLC programming support through my professional network, and coordinated the remaining software, controls, and commissioning work required to achieve a functional customer handoff.
Focus:
C# · WPF · .NET Framework · HMI Development · Modbus/TCP · PLC Integration · Industrial Automation · Commissioning · Project Management
November 2024 – February 2025
A workplace infrastructure project that transformed an unused office closet into a dedicated production server room.
The buildout included room planning, dedicated environmental cooling, static-safe flooring, ESD and electrical preparation, full-height rack deployment, structured power and cabling, and installation of the first production server.
The project moved from concept in November 2024 to the first server entering production use in February 2025.
Focus:
Server Infrastructure · Rack Infrastructure · Environmental Controls · ESD Mitigation · Structured Cabling · Systems Administration
November 2024
A workplace network-infrastructure modernization project that transformed an organically grown installation into a centralized, rack-based environment.
The project included equipment consolidation, rack deployment, Ethernet cable management, improved equipment accessibility, increased serviceability, and creation of a more maintainable physical foundation for the organization's network infrastructure.
Focus:
Network Infrastructure · Structured Cabling · Network Security · Ethernet · SonicWall · Systems Administration
2024 — Graduation Capstone
A C#/.NET order management system developed as my Computer Science graduation capstone project.
The project demonstrates a complete software-development lifecycle including requirements analysis, application architecture, database integration, implementation, testing, packaging, and deployment.
Focus:
C# · .NET · SQL · Software Engineering · SDLC · Testing · Application Deployment
Spring 2024
A C# word-search application developed during my final undergraduate semester to demonstrate algorithm design, data structures, search logic, and application development.
The project reflects my academic foundation in computer science before moving into larger software engineering, infrastructure, systems integration, and security projects.
Focus:
C# · Algorithms · Data Structures · Search Algorithms · Computer Science
My portfolio reflects an expanding technical scope:
Spring 2024
│
├── Computer Science Foundations
│ └── ACM Warrior Word Search
│
2024 Graduation
│
├── Software Engineering
│ └── The Willow Tree Order Management System
│
November 2024
│
├── Network Infrastructure
│ └── Network Infrastructure Modernization
│
├── Server Infrastructure
│ └── Dedicated Server Room Buildout
│ └── First production server online — February 2025
│
December 2024 – June 2025
│
├── HMI Software & Industrial Systems Integration
│ └── Hyspenser-1 HMI
│ └── First production deployment — June 2025
│
August–December 2025
│
├── Technical Documentation & Project Coordination
│ └── Hyspenser-1 IOM & Compressor Manual
│ └── Final editor
│
July 2026
│
├── Industrial Systems
│ └── Modbus PLC Simulator
│
August 2026
│
├── OT/ICS Cybersecurity
│ └── Modbus-Aware Firewall
│
September 2026 – Present
│
└── AI & Agentic Systems
└── Enterprise AI Agent Portfolio
The progression reflects a move from foundational computer science and software development into network and server infrastructure, HMI software and industrial systems integration, technical documentation and project coordination, OT/ICS cybersecurity, and AI.
The technologies below represent tools, platforms, protocols, and languages I have worked with or am actively developing experience with.
C# · .NET · .NET Framework · WPF · Python · SQL · PowerShell · Bash
AWS · Azure · REST APIs · MQTT · JSON · mTLS
Linux · Windows · Git · GitHub · Networking · Server Infrastructure · Rack Infrastructure · SonicWall · Structured Cabling
Modbus/TCP · PLC · HMI · PLC Integration · Commissioning · Suricata · OT/ICS Security · Industrial Automation
Project Management · Technical Leadership · Cross-Functional Coordination · International Team Coordination · Technical Documentation · Technical Editing · Revision Management
Azure AI · Microsoft Foundry · AI Agents · Agentic AI · AI Project Management
Bachelor of Science in Computer Science
Northeastern State University
Cum Laude — 2024
I am continuing to expand my experience across:
- AI and agentic application development
- OT/ICS and industrial cybersecurity
- Cloud and API integration
- Network and server infrastructure
- Software engineering and automation
- Technical leadership, project coordination, and documentation
Some projects in this portfolio are based on professional work or real-world engineering problems.
Public versions are intentionally sanitized to exclude proprietary source code, credentials, production addressing, customer data, internal security details, and other confidential information.
LinkedIn: https://www.linkedin.com/in/mark-sarasua
Contact: mark.sarasua@code-logik.com