
Bill Tai
Data scientist
Salary / Daily rate
St Albans, UK
Mobility: London
Freelance, open to permanent contract
Can come onsite
Skills
Languages
About me
Intro
Technical Data Scientist with 10 years of experience in machine learning, predictive modelling, and advanced analytics. Strong expertise in designing and deploying models that directly impact marketing strategy. Adept at communicating complex analytical outcomes to stakeholders and ensuring that data-driven insights shape strategic decision-making.
Work experience
Data Scientist
RS Group plc
Feb 2015 - Nov 2025
10 years 10 months
Hoyland, Barnsley S74, UK
– Lead end-to-end data science projects applying predictive modelling, clustering, and machine learning to optimize marketing and sales strategies. – Collaborate with senior stakeholders to translate business challenges into actionable analytical solutions. – Automate data workflows and partner with vendors to scale machine learning deployment across the business. – Communicate analytical findings to non-technical audiences, driving adoption of data-driven initiatives. – Built predictive models (Logistic Regression, CHAID) identifying high-value new customers with 70% accuracy (vs. 20% baseline). – Designed segmentation models uncovering customer clusters contributing ~90% of next quarter's revenue. – Delivered a personalized product recommendation engine using the FP-Growth algorithm, deployed on the company website. – Developed lookalike and churn prediction models, enabling proactive customer acquisition and retention. – Created a lead scoring framework that increased sales conversion rates. – Enhanced customer profiling accuracy through data enrichment models for missing industry attributes.
Analyst, Strategic planning
Hong Kong Tourism Board
Aug 2014 - Feb 2015
7 months
Hong Kong
– Analyzed tourism trends, market outlook, and visitor behavior to support strategic marketing decisions. – Delivered actionable insights that informed regional marketing campaigns and strategic planning.
Presales Consultant
ICO Limited
Oct 2013 - Aug 2014
11 months
Hong Kong SAR
– Technical Presales and software demonstrations
Data analyst
Collinson
Mar 2012 - Aug 2013
1 year 6 months
– Generated CRM and campaign performance reports for global loyalty programs. – Supported a major system migration project and provided analytical insights for a Japanese hotel alliance loyalty program.
Database Marketing Analyst
Reader's Digest
Aug 2008 - Dec 2011
3 years 5 months
Sydney NSW, Australia
– Conducted campaign segmentation and regression analyses to optimize targeting and ROI. – Automated campaign workflows, improving efficiency and reducing manual processing time.
Education
The Hong Kong University of Science and Technology
Science, Mathematics, Statistics
2005 - 2008
3 years 1 month
Licenses & certifications
Data Analyst in Python
Issued: –
Data Scientist in Python
Issued: –
SAS Certified Base Programmer for SAS 9
Issued: –
SAS Certified Advanced Programmer for SAS 9
Issued: –