About Me

I’m Carlos Espinosa, a bilingual Field Automation & Cybersecurity Technician with over 9 years of hands-on experience in West Coast port operations — including UTRs, bomb carts, pneumatic brake systems, and container-handling equipment. Based in Los Angeles, I’ve built my career at the intersection of field diagnostics, industrial safety, and modern automation, working to make next-generation port equipment safer, smarter, and more reliable.

Safety is the foundation of everything I do. I’m certified in OSHA Lockout/Tagout, trained in hydraulic and air-brake systems, and hold an Associate of Sciences in Fire Science/EMT, which sharpened my discipline, awareness, and response under pressure.

To stay ahead in today’s evolving industrial landscape, I’ve expanded my technical foundation into:

• PLC Ladder Logic & Automation Control
• SCADA Systems (Ignition 8.3)
• Python Scripting & Network Tools
• CompTIA Security+ and CySA+ (DoD 8570 Compliant)

These credentials align with Department of Defense cybersecurity standards, proving I can operate confidently and securely in both industrial and OT/IT environments.

Whether I’m diagnosing a real-time air-brake fault or programming a digital interlock in Siemens TIA Portal, I bring precision, accountability, and continuous improvement — in English and Spanish — to every system and site I touch.

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Credentials & Certifications

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California Driver’s License · TWIC Card – Active

CompTIA Security+ (2024) · CompTIA CySA+ (In Progress, 2025)

DoD 8570-Aligned Cybersecurity Training (Security+, CySA+)

Maintenance & Control of Electric Motors — Certification (2025)
Alison Training Institute · Verified Credential
Covers motor theory, preventive/corrective maintenance, insulation testing (Megger), starting methods (DOL, Star–Delta, VFD), IP/ATEX safety ratings, bearing & winding diagnostics.

Ignition 8 Core Certification (Completed)

OSHA Lockout/Tagout (LOTO) Certified

Port Operations – YTI / Port of Los Angeles
▪ UTR (Yard Tractor) Operation
▪ Forklift Certified
▪ Safety Signaling & Spotting
▪ Key Clerk / Yard Management

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Associate of Science (A.S.) – Fire Science / EMT Track
Microsoft Office Suite & Technical Presentations (PowerPoint)

Leadership Experience – Technical team coordination & rollout support

Bilingual – Fluent in English and Spanish (technical & conversational)

PLC & SCADA

Experienced with Siemens TIA Portal, Ignition 8.3, OPC UA, ladder logic, and Modbus. I design, test, and document control logic for sequencing, interlocks, and safety—with clean tags, clear comments, and predictable states.

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Cybersecurity

Security+ certified; CySA+ in progress. Comfortable with network fundamentals, Wireshark, Python sockets, and secure field practices (sanitized laptops, change control, least privilege). I align shop-floor actions with OT/IT cyber hygiene and DoD 8570 expectations.

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Field Systems & Diagnostics

Hands-on with UTRs, pneumatic/hydraulic systems, air-brake circuits, and LOTO. My approach: isolate the fault domain, verify power/pressure/signal, and return assets to safe operation quickly—with a documented test-and-verify closeout.

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Programming & Scripting

Python for automation and networking (sockets, parsing, quick tools). Comfortable with PowerShell, CLI utilities, and batch scripts to accelerate diagnostics, data capture, and reporting.

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Industrial Networking

Practical experience in Ethernet/IP, VLANs, IP addressing, and PLC↔SCADA comms. I prioritize segmentation, least-access tooling, and clean handoffs between devices and HMIs.

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Software & Tools

Microsoft Office • PowerPoint • VS Code • Ignition Designer • online PLC simulators • DC/AC Labs • Wireshark • basic CAD/schematic tools for annotating circuits and safety layouts.

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Soft Skills

Bilingual technical communication • tailboard & toolbox talks • safety culture and stop-work authority • on-the-spot training • clear documentation • steady under pressure.

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Traffic Light Control System (PLC Ladder Logic with Pedestrian Interface)

Project Overview
A 10-rung PLC state machine (Red/Green/Yellow) with pedestrian request, TON-timed phases, and a Master Reset that returns the system to a known safe state. The same sequencing/interlock patterns apply to port automation (hoist/boom sequencing, operator-safe transitions).

Highlights

• One-hot state bits with S/R latching
• TON timers with tunable presets per phase
• Pedestrian button latches PED_REQ; WalkLamp during RED; clears on GREEN
• Master Reset clears states, timers, and indicators

Ladder Logic Rungs

• Rung 1 — Master Reset
  Reset → (S) STATE_RED; (R) STATE_GRN, STATE_YEL; (R) PED_REQ, WalkLamp; reset all timers (T_RED.R, T_GREEN.R, T_YELLOW.R). Starts in a known safe state.
• Rung 2 — Pedestrian Button
  PedBtn → (S) PED_REQ.
• Rungs 3–5 — Phase Timers
  STATE_RED → TON T_RED (PT=10s); STATE_GRN → TON T_GREEN (PT=10s); STATE_YEL → TON T_YELLOW (PT=3s).
• Rung 6 — Red→Green
  STATE_RED & T_RED.Q → (S) STATE_GRN; (R) STATE_RED.
• Rung 7 — Green→Yellow
  STATE_GRN & T_GREEN.Q → (S) STATE_YEL; (R) STATE_GRN.
• Rung 8 — Yellow→Red
  STATE_YEL & T_YELLOW.Q → (S) STATE_RED; (R) STATE_YEL.
• Rung 9 — WalkLamp ON
  STATE_RED & PED_REQ → energize WalkLamp.
• Rung 10 — Clear on Green
  STATE_GRN → (R) WalkLamp; (R) PED_REQ.

Portfolio Notes
Demonstrates sequencing, TON timing, S/R latches, HMI interlocks, and a fail-safe Master Reset to return the system to initial safe conditions.

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WHOIS Domain Lookup Tool – Python Socket Project

By Carlos Espinosa | CESPsecure.com

What it is: A ~15-line Python script that opens a raw TCP:43 socket to WHOIS, retrieves registrar/registry data, and prints structured results.

Skills shown: Python sockets • protocol awareness • minimal-dependency tooling • OSINT mindset • reproducible terminal output.

Why it matters: Demonstrates comfort with network layers and packet-first thinking that transfers to OT protocol analysis.

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Real-World Network Troubleshooting in a Live Port Environment

Field Troubleshooting – UTR Display Connectivity

(Image: White terminal tractor (UTR) used for illustrative purposes only.)

Scenario
A UTR display stopped syncing work orders; UI frozen with no error.

Action
Performed a controlled hardware reset via rear switch; verified network reconnection and restored workflow sync.

Impact
HMI back online in minutes; zero work orders lost.
Method: Detect → Act → Verify, with shift-handoff notes.

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Hydraulic Safety PLC Simulation – Four-Rung Logic

Hydraulic Safety PLC Simulation

Goal: Demonstrate pressure-verified lift enable with alarm behavior.

Rungs (4)

1. Start/Stop seal-in → Lift_Enable
2. Pressure_OK & limits → Safe_To_Lift
3. Safe_To_Lift & Up_LS → Lift_Up_Solenoid
4. NOT Pressure_OK → Alarm_Light

Why it matters: Mirrors safety gates used in reach stackers and container handlers; shows clean interlocks and fail-aware logic.

🔹 PLC Logic Summary

Rung	Description	Key Tags
1	Start/Stop latch with branch seal	Start_PB, Stop_PB, Lift_Enable
2	Pressure and enable check	Lift_Enable, Pressure_OK, Down_LS → Safe_To_Lift
3	Lift solenoid control	Safe_To_Lift, Up_LS → Lift_Up_Solenoid
4	Alarm circuit	NOT Pressure_OK → Alarm_Light

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🔹 Tools Used

• PLC Simulator Online
• Ladder Logic Programming
• Basic Hydraulic Circuit Analysis (Pressure Sensor Feedback)

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🔹 Result

This simulation demonstrates real-world maintenance safety logic used in automated port systems like Kalmar reach stackers.
It integrates electrical control, hydraulic principles, and safety interlocks — proving reliability and technician awareness.

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Virtual Reality Rollout: Oculus Rift Technical Support Across 52 Stores

Oculus Rift System Integration & Diagnostics

Role: VR Support Engineer & Demonstrator (Oculus/Best Buy, 2016–2017)
Scope: Supported 52 SoCal stores—system setup, sensor alignment, firmware/content updates, safe demo flow, and staff training.
Transferable value: Hardware bring-up, calibration, firmware hygiene, and user-safety protocols—the same mindset used for HMI/PLC deployments in the field.

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Kalmar Engine Control Demo – Ignition 8.3 SCADA Learning Project

Status: In Progress
Platform: Inductive Automation Ignition 8.3 (Vision Module)

Platform: Ignition 8.3 Vision
Features: 2-state Engine Start/Stop toggle, Stop button, LED numeric display (temp/RPM/pressure), memory tags, and OPC UA setup.
Learning: Tag structure & quality, history, Vision bindings, component scripting, and OPC UA device browsing.
Next: Connect Modbus TCP or emulator, add alarms, trends, and a small OT-security hardening checklist.

Skills Demonstrated:
Ignition 8.3 · OPC UA · Tag Binding · SCADA Design · PLC Simulation · Python Scripting · Industrial Automation

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Bomb Cart Hook-Up and O-Ring Replacement on Air Brake System

Site: Port of LA – live yard
Fault: Audible leak at blue (service) gladhand → cracked O-ring
Fix: LOTO → bleed lines → remove/inspect → replace O-ring → recharge & soapy-water test → return to service.
Outcome: Stopped air loss, prevented downtime, documented a safe return-to-service.

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Battery Voltage & Continuity Test – Multimeter Simulation

Battery Voltage & Continuity Test – Multimeter Simulation

Voltage: Verified 1.5 VDC with correct polarity; translates to verifying supplies before PLC diagnostics.
Continuity: ~0.99 Ω across a resistor; “OL” indicates open circuits—useful for harness/limit/estop checks.
Lesson: Always prove power and path before deeper logic work.

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Applying Network Diagnostics to CAN-Bus for Heavy Port Equipment

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Thesis: Wireshark discipline maps cleanly to CAN diagnostics.

Wireshark Skill	CAN-Bus Equivalent	Use
Filter by IP/protocol	Filter by CAN ID	Isolate joystick→valve messages
Follow TCP stream	Follow repeated ID	Validate sensor consistency
Latency graphs	Inter-frame timing	Catch missing/slow feedback
Protocol tree	ECU/subsystem map	Identify modules & sensors
Retransmissions/errors	CAN error frames/bus-off	Spot wiring/ground/connector faults

Next phase: Add USB-CAN, label IDs, introduce controlled faults, and publish timing/error comparisons.

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⚡ Maintenance & Control of Electric Motors

Industrial Maintenance · Diagnostics · Preventive/Corrective Workflows

Overview

This project covers my training and applied understanding of electric motor maintenance, inspection, diagnostics, and fault analysis. I completed a full certification focused on how motors operate, how to maintain them, how to test insulation, and how to troubleshoot failures found in industrial and heavy-equipment environments.
This knowledge supports field technical work across electric-drive systems, port machinery, and automated equipment.

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Skills Used

• Preventive & corrective maintenance
• Electric motor theory & components
• Insulation resistance (Megger) testing
• Bearing, winding & capacitor diagnostics
• Motor starter circuits (DOL, Star–Delta, VFD)
• IP/ATEX safety ratings
• Visual, mechanical & electrical inspections
• Fault detection & analysis
• Maintenance scheduling (3-month, 6-month, annual)

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Motor Components & Operation

Electric motors generate rotational motion from electromagnetic interaction between the stator and rotor.
Key components include:

• Stator
• Rotor
• Windings
• Bearings
• Shaft
• Brushes & commutator (DC/Universal motors)
• Capacitor (single-phase)
• Terminal box
• Housing & cooling system

Diagram — Motor Components

Understanding these components is essential for diagnosing heat issues, noise, vibration, and electrical imbalance.

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Preventive Maintenance

I documented preventive maintenance workflows broken into three schedules:

Three-Month Checklist

• Clean motor exterior & ventilation paths
• Verify oil ring rotation
• Inspect bearing oil levels
• Check for leaks
• Tighten electrical connections
• Inspect starter components

Six-Month Checklist

• Blow out dirt from windings
• Inspect commutator & clamping ring
• Replace worn brushes
• Service sleeve bearings
• Refresh grease in roller bearings
• Check operating speed
• Tighten motor foot bolts

Annual Checklist

• Full internal inspection (qualified personnel)
• Windings cleaned with dielectric solvent
• Infrared baking for moisture removal
• Comprehensive Megger test
• Load test & vibration analysis
• Complete drive-system alignment check

Diagram — Preventive Maintenance Flow

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Common Motor Faults & Fixes

Failure to Start

• Check wiring
• Verify voltage at terminals
• Inspect fuses & overloads
• Confirm shaft/load rotates freely

Runs & Stops Intermittently

• Overload trip
• Mechanical binding
• Loose connections
• Excess current draw

Bearing Failure

• Poor lubrication
• Contamination
• Misalignment

Winding Failure

• Insulation breakdown
• Overheating
• Moisture ingress

Capacitor Failure (Single-Phase Motors)

• Motor fails to start
• Motor hums without rotation

Diagram — Common Motor Faults

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Insulation Resistance Test (Megger Test)

Steps

1. Disconnect the motor from power
2. Identify T1, T2, T3
3. Measure:
   • Phase-to-phase
   • Phase-to-ground
   • Coil-to-frame
4. Record readings and compare to acceptable standards

This test detects insulation breakdown, moisture, contamination, and winding deterioration.

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Why This Matters

Electric motors drive the majority of industrial and port equipment — pumps, conveyors, cranes, fans, compressors, hydraulic systems, and emerging electric-drive machinery.
Understanding motor maintenance is essential for:

• Field service work
• Heavy-equipment support
• Port automation systems
• Electrified machinery
• High-voltage EV drive components
• Industrial control systems

This project strengthens my ability to diagnose failures, perform preventive maintenance schedules, test motor insulation, select proper replacements, and apply LOTO & electrical safety procedures.

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What I Learned

This certification improved my understanding of:

• Motor construction & operation
• Maintenance workflows (3-month, 6-month, annual)
• Fault diagnosis and troubleshooting
• Motor starting methods
• Megger test procedures
• IP/ATEX environmental ratings
• How industrial motors integrate with automated systems

This training directly supports my growth as a Field Automation & Cybersecurity Technician, preparing me for equipment support roles in modern port environments like Kalmar.

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Bilingual Communication

Fluent in English & Spanish with technical vocabulary for safety briefs, work orders, troubleshooting steps, and customer updates. I translate complex systems into clear, actionable language on the fly.

Portfolio Summary

I started in the yards of the Port of Los Angeles and grew into industrial automation and cybersecurity. My projects prove I can diagnose, design, and document—from seal-in circuits and pressure interlocks to OPC connections and network hygiene. I build systems that protect people, equipment, and uptime—and I’m just getting started.