Data Scientist

NES Group Ltd; City Of London; On-site; GBP 110,000 - 170,000; Full time

Job summary

NES Fircroft (NES) is seeking a Lead Data Scientist to advance customer intelligence, value measurement, and incrementality across markets. You will drive segmentation, CLV modelling, and robust analytics frameworks to support strategic decisions and performance insights.

You will partner with Finance and stakeholders to ensure reproducible value estimates while building scalable pipelines in Databricks and Python. The role requires leadership and strong data governance practices.

Qualifications

• Proficiency in SQL for large-scale analytics across customer and loyalty data.
• Strong Python skills for statistical modelling, cohort analysis, weighting and matching.
• Experience building automated data workflows and data quality controls.

Responsibilities

• Lead customer analytics initiatives including CLV, RFM segmentation, incrementality measurement, and scenario planning.
• Reconcile customer, transaction and margin data to produce trusted value estimates.
• Develop and maintain analytical frameworks to explain performance drivers and data discrepancies.
• Partner with Finance and stakeholders to validate methodologies and ensure reproducibility of value estimates.
• Build scalable analytics pipelines using Databricks, Spark, and Python.
• Establish data validation, audit, and reconciliation practices to support decision-making.

Skills

Advanced SQL

Strong Python (statistical modelling)

Data quality & reconciliation

Reproducible analytics practices

Tools

Databricks

Spark/PySpark

Delta tables

Git

Azure DevOps

Job description

Lead Data Scientist - Customer Intelligence & Value Measurement

We are looking for a Lead Data Scientist to drive customer intelligence, incrementality measurement, and value analytics across multiple markets. This role will lead the development of customer segmentation, customer lifetime value (CLV) models, incrementality methodologies, and value measurement frameworks, providing leadership with robust, defensible insights into customer and commercial performance.

Key Responsibilities

• Lead customer analytics initiatives, including CLV, RFM segmentation, incrementality measurement, and scenario planning.
• Reconcile customer, transaction, and margin data to create accurate and trusted value estimates.
• Develop and maintain analytical frameworks that explain performance drivers and identify discrepancies between data sources.
• Partner with Finance and business stakeholders to validate methodologies and ensure value estimates are reproducible and operationalised.
• Build scalable analytical solutions and pipelines using Databricks, Spark, and Python.
• Establish strong data validation, audit, and reconciliation practices to support decision-making.

Required Skills

• Advanced SQL for large-scale customer, loyalty, payment, and transaction analysis.
• Strong Python skills for statistical modelling, cohort analysis, weighting, matching, and reproducible analytics.
• Hands-on experience with Databricks, Spark/PySpark, Delta tables, and automated data workflows.
• Proficiency with Git, Azure DevOps, and controlled production release processes.
• Strong data quality, reconciliation, and audit-trail practices.

Desirable Skills

• Experience in loyalty programmes, CRM analytics, or retail fuel and convenience sectors.
• Power BI or enterprise reporting platform expertise.
• Production-grade data pipeline design, including incremental processing and Delta MERGE patterns.
• Experimentation, uplift modelling, or incrementality validation experience.
• Exposure to customer decisioning platforms or business needs analysis (BNA).

With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining and Manufacturing sectors worldwide.

With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients