Materials Testing
Guillermo Torregrosa
City of Kansas City, MO – Public Works Department
Holiday,FL
1
Certification
12
years of professional experience
Engineering Technician with 12+ years of public service experience conducting concrete and compaction testing, equipment calibration, and field inspections to ensure contractor compliance with KCMO standards. Regularly prepares clear, dated inspection reports and maintains calibration records to support project audits and manager decisions. Seeks to apply practical testing expertise and regulatory knowledge to improve construction quality and pavement performance.
Work History
Senior Engineering Technician
11 Months- Performed materials testing to assure contractor compliance with City of Kansas City standards and specifications.
- Performed proctor testing and sampling to determine optimum moisture content and maximum dry density.
- Inspected fresh and hardened concrete samples using slump, air content, and compression tests to verify mix compliance with KCMO specifications.
- Reviewed contractor QC plans and flagged missing mix design data, prompting resubmittal before acceptance.
- Calibrated field testing equipment and documented calibration records to maintain traceable measurement accuracy for inspections.
- Maintained calibration logs and executed scheduled equipment calibrations to preserve test validity for project audits.
- Collected core samples from completed pavement sections and prepared lab submission logs for city review.
- Compiled daily field inspection reports in Microsoft Office and distributed them to project managers for decision-making.
Engineering Technician Lead
3 Years- Performed concrete materials testing to assure contractor compliance with KCMO standards and specifications on construction projects.
- Performed snow removal during winter months as well as other duties as assigned.
- Calibrated and maintained field test equipment daily to preserve measurement accuracy on site projects.
- Prepared clear, dated daily field reports in Microsoft Office for project managers and project files.
- Conducted field compaction tests with calibrated equipment and recorded results in dated project logs.
- Measured concrete slump and air content on-site, flagged out-of-spec samples for retesting.
- Coordinated daily equipment inspections and performed preventive repairs to maintain testing readiness.
Engineering Technician
5 Years 6 Months- Processed excavation permits using EnerGov/Kiva for City departments, utility companies, and contractors.
- Provided customer service to internal and external customers while attending meetings related to permit processes.
- Assisted coworkers as needed such as helping with walk-in customers and answering phone calls regarding the permit process.
- Performed snow removal during winter months as well as other duties as assigned.
- Used programs such as Excel and Microsoft word to organize and keep track of permits and contact information.
- Worked along side other departments whenever a permit needed review from outside Public Works jurisdiction.
- Reviewed permit submissions with utility maps and site plans to make sure they were with accordance to ATSSA guidelines.
Fleet Maintenance Technician
1 Year 4 Months- Diagnosed hydraulic leaks using pressure testing and replaced damaged hoses.
- Performed electrical diagnostics on lighting and wiring harnesses and repaired faults.
- Completed preventative maintenance for municipal fleet vehicles and equipment.
- Conducted pre-shift safety checks and flagged critical issues to reduce in-service breakdowns during routes.
- Inspected braking systems on heavy-duty trucks and documented faults for scheduled repairs.
- Performed tired repairs, replacements and balance on trash trucks.
Maintenance Worker
9 Months- Repaired pothole surfaces using hot-mix asphalt and hand tampers to restore roadway integrity.
- cleared debris from storm drains and catch basins
- Applied hot rubberized crack sealant on pavement
- Operated CDL truck with air brake and trailer hooked
Automotive Service Technician
8 Months- Performed oil changes in upper and lower bay
- Tested AC systems for leaks
- Installed new tires and performed tired rotations and balance
- Assisted in customer checkout and provide tire service request information to customers
- Drove and parked customers with upmost care
Education
High School Diploma
Skills
Field service support
Customer Service
Microsoft/Excel software proficiency
Quality Control
Data Analysis
Team Collaboration
Testing Equipment Calibration
Certification
- Concrete Field Technician - Grade 1 - ACI (Oct 2020-Oct 2025)
- EHSM 700 - Hazwoper 24 Hour Training - Metropolitan Community College (Feb 2020)
Languages
Spanish
Native or Bilingual
Timeline
Senior Engineering Technician
City of Kansas City, MO – Public Works Department
05.2025 - 04.2026Read More
Engineering Technician Lead
City of Kansas City, MO – Public Works Department
05.2022 - 05.2025Read More
Engineering Technician
City of Kansas City, MO – Public Works
11.2016 - 05.2022Read More
Fleet Maintenance Technician
City of Kansas City, MO – General Services Department
07.2015 - 11.2016Read More
Maintenance Worker
City of Kansas City, MO
10.2014 - 07.2015Read More
Automotive Service Technician
Walmart
02.2014 - 10.2014Read More
Hillsborough Community College
High School Diploma
Read More