Wanjiru W.

Key Skills

Software

Other

Internal/Proprietary Tooling

Top Subject Matter

Water and sewer infrastructure mapping

geospatial project monitoring and GIS geodatabases

Socio-economic field surveys and spatial datasets for ASAL development research and transparency-related studies

Top Data Types

Text

Geospatial Tiled Imagery

Video

Top Task Types

Mapping

Data Collection

Freelancer Overview

Experienced data and technical professional with strong background in structured data collection, monitoring & evaluation, GIS-based systems, and technical reporting. Skilled in managing large-scale datasets, designing data collection tools, ensuring data quality, and producing analytical reports for decision-making. Adept at working with structured information systems, documentation, and performance tracking frameworks. Seeking opportunities in AI data evaluation, annotation, and model training support roles.

Labeling Experience

GEOGRAPHIC SYSTEMS OFFICER (GIS)

Geospatial Tiled ImageryPolygon

Managed technical operations and supported infrastructure planning and implementation of water supply systems. Designed and reviewed water distribution systems using Civil 3D and GIS tools. Led implementation of mobile-based data collection systems to improve field data accuracy and reporting efficiency. Participated in monitoring and evaluation processes, producing performance and compliance reports for management decision-making. Supported development of strategic documents including business plans, policy frameworks, and regulatory reports. Ensured accuracy and consistency of technical and operational datasets used for planning and reporting.

2021 - Present

GIS Officer and Acting Non-Revenue Water Officer — GATAMATHI Water and Sanitation Company (08/2018 - 08/2020)

DocumentData Collection

Directed GIS initiatives for Non-Revenue Water (NRW) detection that relied on geospatial audits and field-driven data capture. Designed and deployed mobile data collection platforms and supervised GIS field interviewers to improve data accuracy and operational efficiency. Created and maintained a company geodatabase used to manage pipeline profiles, customer records, and NRW asset information. • Audited DMA master meters and PRVs by collecting geospatial coordinates to flag dormant, faulty, or illegal connections. • Conducted NRW detection for illegal reconnections, meter irregularities, burst lines, and pressure-management issues. • Oversaw customer meter relocation while updating NRW geodatabase records. • Trained teams on GIS tools for NRW data visualization and reporting.

2018 - 2020

GIS Intern — Nyeri Water and Sewerage Company (NYEWASCO) & Department of Water, Environment & Natural Resources, Nyeri County Government (08/2017 - 08/2018)

Don't discloseGeospatial Tiled ImageryData Collection

Conducted geospatial data collection and spatial mapping to accurately document infrastructure projects and support real-time monitoring needs. Designed and deployed web-GIS platforms and centralized geodatabases to enable structured data management for project evaluation. Produced Civil 3D design drawings and planned network extensions that were integrated into enterprise GIS systems for ongoing use. • Digitized and maintained customer and infrastructure datasets. • Developed an Android-based application to improve sanitation service delivery and operational efficiency. • Performed engineering and land surveys to generate spatially referenced outputs. • Built/edited geometric network components and integrated them into the GIS data model.

2017 - 2018

Research Assistant and Data Analyst — Centre for Training and Research for ASAL Development (CETRAD) & Transparency International (06/2016 - 06/2017)

OtherAudioData Collection

Planned and executed structured field research data collection workflows using spatial sampling and digitization methods. Designed data collection tools and survey instruments to ensure reliable capture of household and socio-economic information. Managed field data collection processes with quality control to maintain completeness and adherence to research protocols. • Led sampling design and digitization of households within study areas to create spatial datasets. • Conducted large-scale surveys across multiple counties by administering questionnaires. • Implemented quality checks for field-collected datasets. • Coordinated logistics for structured data capture across wards to support analysis-ready outputs.

2016 - 2017

Education

Work History