Environmental Sciences Ltd La Brea, Trinidad & Tobago

Josh Charles

Analytical ChemistEnvironmental Laboratory Testing

I bring precision to the bench and clarity to the results: testing environmental samples, keeping instruments honest, and upholding the quality systems that make every data point count.

Current role
Analytical Chemist
Laboratory
Environmental Sciences Ltd
Education
BSc Chemistry, UWI
Sample report ENV-042
pH
7.42pH
Grain size distribution % passing
  • Conductivity 512 µS/cm
  • TDS 268 mg/L
  • Salinity 0.24 ppt
ISO/IEC 17025 Illustrative sample data

Science with a paper trail.

Good chemistry is only half the job. The other half is proving the result: clearly, consistently and in a way that holds up to scrutiny.

Josh Charles, Analytical Chemist

I'm an analytical chemist with hands-on experience in environmental laboratory testing. My work brings together quality assurance, analytical instrumentation and Quality Management Systems, with a focus on accuracy, compliance and results people can trust.

At Environmental Sciences Limited, I run environmental tests, keep equipment calibrated and verified, and help maintain a QMS aligned with ISO/IEC 17025. I've supported an accreditation audit, taken part in proficiency testing, and built the charts, reports and records that turn raw measurements into decisions.

I like the part where precision meets communication: interpreting data, documenting the method, and making the finding understandable to someone who wasn't in the lab.

Off the clock
  • Research
  • Swimming
  • Art
  • Data analysis
  • Technology

Where I've put it to work.

From a part-time internship to a full-time analytical role, a steady build of testing, quality and reporting experience in a laboratory working to ISO/IEC 17025.

  1. June 2024 to Present

    Environmental Sciences Limited
    San Fernando, Trinidad & Tobago

    Analytical Chemist

    Full-time

    Chemistry Department

    • Perform environmental testing including pH, salinity, conductivity, TDS, TSS, oil & grease/TPH and grain size analysis.
    • Handle, prepare and process environmental samples according to laboratory procedures.
    • Operate, calibrate and maintain laboratory equipment and analytical instrumentation.
    • Analyse and organise test data into reports, charts and visualisations that are clear and decision-ready.
    • Help maintain and improve the laboratory QMS in accordance with ISO/IEC 17025.
    • Review and update laboratory procedures, forms and quality documents, keeping records accurate and traceable.
    • Took part in the ISO/IEC 17025 accreditation audit, supplying technical and quality documentation.
    • Take part in proficiency testing and QC checks, and assist with method verification, equipment acceptance and functional verification.
    • Support risk and opportunity assessments, nonconformance management and corrective actions.
    • Environmental Testing
    • QA / QC
    • ISO/IEC 17025
    • Method Verification
    • Technical Reporting
  2. March to April 2024

    Environmental Sciences Limited
    San Fernando, Trinidad & Tobago

    Part-Time Intern

    Internship

    Chemistry Department

    • Conducted routine laboratory testing including pH, conductivity and TDS.
    • Calibrated and verified equipment including the OHAUS Starter 300 pH meter and Oakton PCTSTestr 50 pocket tester.
    • Participated in proficiency testing alongside senior laboratory personnel.
    • Routine Testing
    • Calibration
    • Proficiency Testing

What I do well.

The technical and the systematic, from the first sample to the final signed record.

01 / Testing

Environmental testing, end to end.

Routine and investigative analysis across the parameters that define environmental quality, from sample preparation to a result I'd sign my name to.

  • pH
  • Salinity
  • Conductivity
  • TDS
  • TSS
  • Oil & grease / TPH
  • Grain size
02 / Quality
ISO / IEC 17025

Quality that stands up to audit.

I work inside a QMS built for ISO/IEC 17025, and supported the laboratory through its accreditation audit.

  • Accreditation audit support
  • Nonconformance & corrective action
  • Risk & opportunity assessment
03 / Instruments

Instrumentation & calibration

Operating, calibrating and maintaining lab instruments, including the OHAUS Starter 300 pH meter and Oakton PCTSTestr 50 pocket tester.

04 / QMS

Quality systems

Procedures, forms and records kept current, controlled and audit-ready under ISO/IEC 17025.

05 / QC

Proficiency testing

PT participation and quality control checks that test the method, the analyst and the result.

06 / Data

Data & reporting

Test data organised into charts, visualisations and technical reports that are easy to read and act on.

07 / Verification

Method verification

Equipment acceptance, functional verification and method verification support, from the bench up.

08 / Records

Documentation & control

Accurate laboratory records, document control and traceability: the quiet backbone of good science.

Foundations & training.

A chemistry degree grounded in analytical science and laboratory quality, plus applied wastewater treatment training.

Degree

BSc Chemistry

University of the West Indies
St. Augustine, Trinidad & Tobago

Minor
Analytical Chemistry
Key modules
Analytical Chemistry · Quality Assurance for Laboratories
A-Levels

CAPE

Caribbean Advanced Proficiency Examination

  • Chemistry
  • Physics
  • Biology
Training

Wastewater Treatment

Caribbean Industrial Research Institute (CARIRI)

Wastewater Treatment Plant (WWTP) training

Have a role, project or question?

Let's make the data make sense.

Location

Chin Fong Alley, La Brea
Trinidad & Tobago

Background

BSc Chemistry · Analytical Chemistry
ISO/IEC 17025 laboratory experience