Marlián Deras Barbosa
Duncombe,IA
Summary
Quality-focused Analytical Chemist with experience in herbicide manufacturing, quality control testing, and mass spectrometry. Proven track record in cross-contamination control, assay preparation, method development, and regulatory compliance (EPA/OSHA). Strong leadership and lab management skills with a commitment to safety, SOP adherence, and audit readiness. Skilled in high-throughput analytical testing, troubleshooting, and supporting new product development initiatives. Willing to relocate for the right opportunity.
Overview
13
13
years of professional experience
Work History
Analytical Chemist / Mass Spectrometry Chemist
Van Diest Supply Company
Webster City, IA
03.2025 - Current
- Lead cross-contamination testing during product changeovers to ensure residual active ingredients are below established contamination limits prior to lot release.
- Develop, optimize, and execute analytical methods using GC/MS and LC/MS (Agilent triple quadrupole systems) for trace-level detection of herbicides and impurities.
- Perform quantitative analysis using calibration curves and certified reference standards on GC and LC systems.
- Conduct wastewater treatment analysis to ensure compliance with OSHA and EPA regulatory limits, including glyphosate monitoring.
- Support the main quality control laboratory as lead chemist, performing assay preparation and troubleshooting analytical issues.
- Assist in new product development, including analysis of trial batches and small-scale batch adjustments.
- Operate and support a high-throughput lab environment with 16 LC systems and 3 GC systems running multiple products concurrently.
- Review and document analytical results, ensuring data integrity and compliance with internal quality standards and SOPs.
Laboratory Technician (Quality Control)
Van Diest Supply Company
Webster City, IA
09.2024 - 02.2025
- Performed routine quality control testing on dry flowable and liquid herbicide formulations to verify conformance to product specifications.
- Conducted analytical tests including pH, viscosity, moisture content, wet sieve (wet screen) analysis, and assay preparation.
- Executed batch and lot testing to support product release decisions.
- Maintained accurate documentation using QC worksheets and batch records in compliance with internal quality systems.
- Supported continuous quality testing to ensure active ingredient concentrations met specification throughout production.
- Followed laboratory SOPs, safety procedures, and good laboratory practices in a manufacturing environment.
Self-employed
By Marlu
Puerto Rico
02.2019 - 02.2023
- Operated a small retail business selling purses, hair accessories, and dog bandanas.
- Managed inventory, customer service, and order fulfillment, strengthening organizational and leadership skills.
- Handled sales, budgeting, and social media marketing, demonstrating initiative and self-management.
Waitress
Chili’s Restaurant/ Carbon De Palo
Mayaguez, PR
05.2013 - 03.2021
- Provided high-level customer service in fast-paced restaurant environments.
- Strengthened communication, multitasking, and teamwork skills.
- Managed orders, cash handling, and customer interactions with professionalism and attention to detail.
Undergrad Research
M.Sc. Maritza De Jesus Echevarria
08.2017 - 05.2018
- Conducted experiments to investigate the repellent properties of different plants.
- Provided technical assistance during fieldwork activities such as sample collection and instrumentation setup.
- Developed reports and recommendations regarding research outcomes.
- Maintained clean and fully operational laboratory equipment.
Education
Bachelor Degree of Science - Chemistry
University of Puerto Rico
Mayaguez06.2019
Environmental Chemistry Certificate -
University of Puerto Rico - Mayaguez
Mayaguez, PR06-2019
High School Diploma -
Esc. Sup. Eugenio María De Hostos
05-2010
Skills
- Analytical Instrumentation: LC/MS (Triple Quadrupole), GC/MS operation and routine maintenance
- Physical & Chemical Testing: Moisture, pH, particle size, suspensibility, viscosity, and other product characterization
- Method Development & Validation: Supporting new analytical procedures and optimization
- Quality Control & Compliance: SOP adherence, batch/lot release testing, EPA/OSHA compliance, audit readiness
- Sample Preparation & Assay Analysis: Standard prep, calibration curves, quantitative analysis
- Lab Safety & Team Leadership: Chemical handling, mentoring lab staff, process improvement
- Technical & Administrative Skills: Lab recordkeeping, QC reporting, workflow coordination, Microsoft Office, MassHunter Software, bilingual English/Spanish
Timeline
Analytical Chemist / Mass Spectrometry Chemist
Van Diest Supply Company
03.2025 - Current
Laboratory Technician (Quality Control)
Van Diest Supply Company
09.2024 - 02.2025
Self-employed
By Marlu
02.2019 - 02.2023
Undergrad Research
M.Sc. Maritza De Jesus Echevarria
08.2017 - 05.2018
Waitress
Chili’s Restaurant/ Carbon De Palo
05.2013 - 03.2021
Bachelor Degree of Science - Chemistry
University of Puerto Rico
Environmental Chemistry Certificate -
University of Puerto Rico - Mayaguez
High School Diploma -
Esc. Sup. Eugenio María De Hostos