Data Analyst - Performance
About Assystem
At Assystem, our mission is to accelerate the energy transition worldwide. Our 8,000 Switchers blend historical engineering expertise with cutting-edge digital technologies to drive this change. Join us in revolutionizing the energy sector and making a significant global impact.
Why Join the Community of Switchers?
Be part of one of the top three largest nuclear engineering companies globally. At Assystem, you'll contribute to groundbreaking projects that push the boundaries of innovation and engineering excellence. Join a community committed to driving forward the future of energy.
Job Purpose / Overview
The Performance Analyst plays a critical role in analysing business performance, identifying data and capability gaps, and enabling data-driven decision making across the organisation. Acting as the conduit between business stakeholders, data architects, and technical delivery teams, the role ensures that business requirements are translated into high-quality data products that deliver strategic value.
The Performance Analyst supports the end-to-end lifecycle of data and analytics solutions, from problem definition and requirements capture through to delivery, insight generation, and communication.
Key Responsibilities
Analyse and understand business data, identifying gaps across people, processes, systems, and information to guide decision-making and data product development
Analyse business problems and opportunities, capturing clear and structured requirements within the requirements database
Identify data gaps and define data requirements required for ingestion into the analytics platform
Communicate insights, findings, and conclusions using appropriate formats, including data visualisations and reports
Support architecture and technical delivery teams to ensure data products meet business requirements
Use agile delivery methodologies, leveraging Azure DevOps to manage user stories, tasks, dependencies, risks, and issues
Perform end-to-end analytical activities including data discovery, profiling, validation, transformation, analysis, and interpretation
Raise open issues relating to operating models or data products to the Information Design Authority (IDA) open issues register for review and resolution
Contextual Information
The Performance Analyst is one of four roles within an Information Management Pod and acts as the primary interface between business stakeholders and the technical delivery teams. The role supports communication at both strategic and technical levels, ensuring alignment between business objectives, architecture, and data delivery.
All activities are governed by the Information Design Authority (IDA) process, which ensures consistency between requirements, architecture, and technical outputs. Any deviations identified during delivery are formally captured and managed through the IDA governance framework.
This role is suited to an analytical thinker who can translate technical complexity into clear business insight, ensuring the Information Management team delivers robust, compliant, and value-driven data solutions.
Qualifications, Knowledge & Skills
Essential
Degree-level qualification or equivalent experience in a relevant discipline (e.g. Business, Data & Analytics, Engineering, Computer Science, Economics, or similar analytical field)
Demonstrable experience leading requirements definition, process mapping, and problem-framing within data-centric programmes or transformations
Experience working within multidisciplinary teams
Proven ability to analyse complex business processes and identify data gaps using structured techniques (e.g. As-Is / To-Be, swimlanes, use cases, decision modelling)
Strong experience performing end-to-end analytical work, including data discovery, validation, analysis, and communication
Working knowledge of SQL, sufficient to write queries, explore datasets, validate transformations, and troubleshoot basic issues
Ability to read and interpret Python code used for data processing or analytics, with the capability to modify simple scripts if required
Experience working on projects or programmes in structured, controlled environments with formal governance and change control
Desirable
Professional qualification in Business Analysis
Professional qualification in Data or Analytics
Experience working in nuclear, asset-intensive, or safety-critical industries
Why Apply?
Join Assystem and become a key player in delivering critical nuclear projects that shape the future of energy. Embrace this opportunity to excel in a dynamic environment where your expertise and leadership will drive global innovation.
Your Benefits Package
Hybrid Working - Flexibility to work from home and the office
25 Days Annual Leave + Bank Holidays
Buy & Sell Holiday - Make your time off work for you
8% Company Pension Contributions
Income Protection & 3x Salary Death-in-Service Cover
Competitive Sick Pay - Support when you need it
Healthcare Cash Plan - Claim back on dental, optical & more
Free Digital Gym Access - Expert-led fitness classes
Exclusive Discounts - Restaurants, days out & top brands
24/7 Employee Support Line - Mental health, financial & legal help
Cycle to Work Scheme - Save money & go green
Free Flu Jabs & Eye Test Vouchers
Paid Professional Membership Fees
Volunteer Days - Make a difference on company time
We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter!
Bring your unique contributions and help us shape the future.
We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.