Data Analyst - Data Cleanse

Data Analyst - Telecoms - Data Cleansing Specialist

Hybrid: 2 days per week in Reading, London, Leeds or Birmingham

Travel: 1 visit to Birmingham per month

Rate: £350+ per day (Inside IR35)

Contract: Rolling 3-6 month extensions

Role Overview

A fantastic opportunity has arisen to join a major telecoms organisation at the heart of a UK-wide fibre transformation programme. This is a large-scale, high-impact initiative involving new technologies, mergers & acquisitions, and the modernisation of critical network infrastructure.This role offers the chance to work on complex, business-critical data challenges, helping shape a single source of truth across the organisation. With multiple new projects underway and long-term investment secured, this is an excellent opportunity to join a growing team where your work will have real, lasting impact - with strong potential for long-term contract extensions.

The Role

Working within the Fixed Access Engineering Team, you'll use your existing deep understanding of data to identify underlying data challenges and uncover anomalies across complex systems.This role is focused on improving data quality and consistency across the programme. You'll be responsible for cleaning and improving complex datasets, carrying out deep-dive analysis, and integrating and tracking data across multiple systems.You will investigate anomalies, interrogate data and tools in detail, and work closely with engineering and network teams to ensure issues are understood and resolved. A key part of the role will involve feeding corrected data back into core systems and productionalising data processes to drive long-term improvements.This is a highly collaborative position where you'll:

Work closely with design teams

Engage with network knowledge experts

Partner with data and engineering teams to ensure accuracy and alignment

Key Responsibilities

Drive a data-led culture built on a single source of truth

Work with stakeholders to understand data challenges and anomalies

Use SQL and telecoms knowledge to identify data issues

Investigate anomalies across multiple tools and data sources

Clean, improve, and validate complex datasets

Integrate and track data across systems

Develop and implement automated data cleansing approaches

Build and support data flows into central inventory systems

Communicate insights and influence data-driven decisions

Ensure data is reintegrated in a robust, traceable way

Essential Skills

Strong SQL (interrogating, merging, transforming data)

Experience investigating anomalies and data issues

Proven data cleansing experience

Ability to interrogate tools and complex datasets

Strong Excel (no VBA/macros required)

Good communication and stakeholder engagement

Strong understanding of data quality and data management best practices

Desirable

Experience with BigQuery / GCP

Knowledge of Fixed Telecoms / Fibre network data