Summary
Overview
Work history
Education
Skills
PROFESSIONAL INTERESTS
Affiliations
Timeline
Generic

WINIFRED MOIRA JOHNSON-WILLIAMS

Swansea,UK

Summary

Environmental and Infrastructure Engineer with a background in mechanical and maintenance engineering and five (5) years of experience working in regulated industrial environments. Experienced in supporting site operations, environmental and safety compliance activities, inspections, reporting, and coordination across engineering, maintenance, and operational teams. Currently completing an MSc in Environmental Hazards and Disaster Risk Reduction at Cardiff University, building specialist knowledge in environmental risk assessment, water systems, and infrastructure resilience. Interested in environmental roles that combine site work, monitoring, compliance, and technical reporting, particularly where engineering operations and environmental management intersect.

Overview

6
6
years of professional experience

Work history

Heavy Mining Equipment Senior Supervisor

Marampa Mines Limited_Large-scale iron ore mining
Lunsar, Sierra Leone
2023.06 - 2025.09
  • Supported environmental and safety compliance activities through routine site inspections, monitoring observations, and documentation in line with site procedures.
  • Coordinated daily site activities across operations and maintenance teams and contractors, in a safety-regulated industrial environment.
  • Maintained environmental and safety records, including inspection logs, corrective action registers, and incident follow-up documentation.
  • Identified potential operational and environmental risks during site activities and escalated issues for corrective action.
  • Prepared operational and compliance reports for engineering and management teams to support site performance and decision-making.
  • Monitored employee performance to identify areas requiring additional training or development efforts for junior staff members, enhancing overall team performance.

Project Planner Supervisor / Mechanical Engineer

Marampa Mines Limited
Lunsar, Sierra Leone
2022.12 - 2023.05
  • Supported the delivery of engineering and maintenance projects in a regulated industrial environment, working closely with operations and HSE teams.
  • Coordinated work schedules, contractor activities, and site tasks to ensure safe and efficient execution.
  • Assisted with planning activities, including progress tracking, schedule updates, and follow-up on outstanding actions.
  • Maintained documentation control, including technical records, work plans, and operational reports.
  • Large-scale iron ore mining operation and subsidiary of the Gerald Group, supporting heavy industrial equipment operations and infrastructure development within a regulated mining environment.
  • Trained and mentored junior team members, leveraging previous experiences in boosting project progress.

Materials Controller / Project Planner

Marampa Mines Limited
Lunsar, Sierra Leone
2022.08 - 2022.12
  • Coordinated materials planning and procurement activities supporting maintenance and engineering operations.
  • Maintained materials tracking systems, ensuring the availability of critical components aligned with project schedules.
  • Supported documentation control processes contributing to audit readiness and operational efficiency.
  • Large-scale iron ore mining operation and subsidiary of the Gerald Group, supporting heavy industrial equipment operations and infrastructure development within a regulated mining environment.

Service Engineer (Caterpillar)

Mantrac Sierra Leone Limited
Freetown, Sierra Leone
2019.11 - 2022.07

Authorised Caterpillar dealer providing heavy equipment, power solutions, and technical support services to construction, mining, energy, and industrial sectors.

  • Delivered field service, troubleshooting, and commissioning support for Caterpillar equipment across multiple customer sites.
  • Managed Customer Support Agreements (CSA), coordinating scheduled maintenance, product support visits, and service follow-ups with clients.
  • Conducted site visits to assess equipment performance, provide technical guidance, and support reliable operations.
  • Performed extensive repair works to restore functionality in faulty machines.
  • Communicated technical findings and recommendations to customers and internal teams, strengthening client relationships and service delivery.

Education

MSc - Environmental Hazards & Disaster Risk Reduction

Cardiff University
Cardiff, United Kingdom
2025.09 -

BEng - Mechanical & Maintenance Engineering

Fourah Bay College | University of Sierra Leone

Skills

  • Microsoft 365: Excel, Word, Outlook, and Teams
  • Environmental data analysis using Python (coursework exposure)
  • GIS mapping and spatial data analysis using QGIS (coursework)
  • Inspection records, compliance logs, and operational reporting systems
  • Permit-to-work and site reporting documentation
  • CMMS and asset maintenance systems

PROFESSIONAL INTERESTS

Environmental monitoring and compliance within infrastructure and industrial environments, with particular interest in water systems, flood risk, and environmental protection.

Affiliations

  • TechWomen Fellow - U.S. Department of State STEM Leadership Exchange program (2024)
  • Corporate Member - Sierra Leone Institution of Engineers (SLIE)
  • Member - Sierra Leone Women Engineers (SLWE)
  • Knowledge-sharing facilitator and STEM mentor (industry and university programmes)
  • Postgraduate Student Representative to Board of Studies - Cardiff University | School of Earth and Environmental Sciences

Timeline

MSc - Environmental Hazards & Disaster Risk Reduction

Cardiff University
2025.09 -

Heavy Mining Equipment Senior Supervisor

Marampa Mines Limited_Large-scale iron ore mining
2023.06 - 2025.09

Project Planner Supervisor / Mechanical Engineer

Marampa Mines Limited
2022.12 - 2023.05

Materials Controller / Project Planner

Marampa Mines Limited
2022.08 - 2022.12

Service Engineer (Caterpillar)

Mantrac Sierra Leone Limited
2019.11 - 2022.07

BEng - Mechanical & Maintenance Engineering

Fourah Bay College | University of Sierra Leone
WINIFRED MOIRA JOHNSON-WILLIAMS