Sergio R. Trejo
Saint Clair Shores,MI
Summary
Manufacturing Process Engineer with experience in optimizing production lines, chemical process control, and quality assurance in metal finishing and coating operations. Skilled in SQL and Microsoft Access for data analysis, reporting, and process tracking, as well as process automation, preventive maintenance, and material analysis. Passionate about continuous improvement, cost reduction, and enhancing production workflows to maximize uptime and product quality.
Overview
9
9
years of professional experience
Work History
Process Engineer - Manufacturing
AJAX METAL PROCESSING, INC
Detroit, MI
01.2025 - Current
- Led chemical coating processes (nickel, zinc, chrome) to improve product durability and consistency.
- Monitored and adjusted pH, concentration, and temperature in real time to ensure process stability.
- Optimized dosing systems and performed quality control using atomic absorption spectroscopy (AA) and X-ray testing to evaluate coating integrity.
- Performed daily data acquisition and developed control adjustments based on process parameters to maintain optimal operating conditions.
CNC Engineer - Automation Specialist in Wood Cutting
MTD Kitchen
03.2024 - 12.2024
- Operated and maintained CNC machinery for high-precision wood cutting, reducing downtime by 30%.
- Developed and implemented preventive maintenance plans to extend equipment lifespan.
- Ensured production line efficiency by optimizing machine parameters and workflow organization.
Senior Automation Engineer
CIMA Automation
03.2023 - 12.2023
- Directed and implemented mechatronics and automation projects, ensuring seamless system integration.
- Conducted on-site assessments, troubleshooting, and installations of automation systems.
- Integrated 3D printed components in industrial control panel assemblies, improving layout, durability, and visual presentation.
- Developed internal tools using Microsoft Access and SQL to track equipment diagnostics and streamline maintenance reporting.
Specialist in Additive Manufacturing and 3D Prototyping
Self Employed
08.2017 - 12.2023
- Developed and prototyped components for various industries.
- Designed and manufactured precision engineering parts.
- Created impactful solutions, utilizing additive manufacturing techniques.
Temporary Engineering Teacher
Universidad Politécnica de Aguascalientes
01.2023 - 03.2023
- Taught courses on manufacturing, hydraulics, and pneumatics.
- Developed curricula and teaching materials.
- Evaluated and mentored students, ensuring their academic growth.
Consultant in the Development of Mechatronic Projects
Grupo Nauko SA de CV
09.2022 - 01.2023
- Assisted in the creation of mechanical models and tools for MiR robots.
- Designed and implemented effective automation solutions.
- Collaborated with multidisciplinary teams to ensure seamless integration.
Internal Plant Installation Supervisor
Totalplay
11.2021 - 05.2022
- Managed and supervised teams of technicians for efficient operations.
- Conducted audits and training of installation technicians.
- Utilized SAP for inventory management and tracking installation progress.
- Created reporting tools using Microsoft Access and SQL to consolidate field data and improve installation workflow visibility.
Project Management Engineer
La Providencia Electrica de las Huastecas, s.a. de c.v.
01.2021 - 11.2021
- Led the installation of a 10 MW turbogenerator and a 1.5 MW backup generator.
- Directed the installation of high and medium voltage substations in wind farms and sugar mills.
- Oversaw the installation of high-pressure lubrication and steam pipelines.
- Secured new projects by winning bids and negotiating with plant managers.
Installation Engineer
Promotora Kabat
09.2020 - 01.2021
- Managed the installation of satellite monitoring systems and intelligent cameras in urban buses.
- Provided technical support and troubleshooting during installations.
- Ensured compliance with quality and safety regulations.
Backend Developer
Registro Público de la Propiedad y de Comercio
01.2019 - 05.2019
- Supported the 'Notaria Net' website.
- Maintained servers and installed computer equipment.
- Digitized physical books.
Maintenance Engineer
La Providencia Electrica de las Huastecas, s.a. de c.v.
09.2016 - 12.2016
- Resolved mechanical problems and conducted preventive maintenance for industrial machinery.
- Ensured all equipment met operational standards.
Education
Mechatronic Engineer - electronic engineering, robotics, and mechatronics
Universidad Politécnica de Aguascalientes
01.2020
Skills
- Industrial process optimization
- Automation and quality control
- Additive manufacturing and 3D design
- SQL database management
- Microsoft Access applications
- Data integration and ETL
- Industrial project management
- Mechanical design for manufacturing
- Material analysis techniques
- Prototype development
- Engineering documentation
- Cost estimation strategies
Timeline
Process Engineer - Manufacturing
AJAX METAL PROCESSING, INC
01.2025 - Current
CNC Engineer - Automation Specialist in Wood Cutting
MTD Kitchen
03.2024 - 12.2024
Senior Automation Engineer
CIMA Automation
03.2023 - 12.2023
Temporary Engineering Teacher
Universidad Politécnica de Aguascalientes
01.2023 - 03.2023
Consultant in the Development of Mechatronic Projects
Grupo Nauko SA de CV
09.2022 - 01.2023
Internal Plant Installation Supervisor
Totalplay
11.2021 - 05.2022
Project Management Engineer
La Providencia Electrica de las Huastecas, s.a. de c.v.
01.2021 - 11.2021
Installation Engineer
Promotora Kabat
09.2020 - 01.2021
Backend Developer
Registro Público de la Propiedad y de Comercio
01.2019 - 05.2019
Specialist in Additive Manufacturing and 3D Prototyping
Self Employed
08.2017 - 12.2023
Maintenance Engineer
La Providencia Electrica de las Huastecas, s.a. de c.v.
09.2016 - 12.2016
Mechatronic Engineer - electronic engineering, robotics, and mechatronics
Universidad Politécnica de Aguascalientes
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