About ENSEK ENSEK builds the cloud‑native SaaS software that’s transforming how energy retailers operate, innovate and manage at scale. We help retailers lower operating costs, improve billing accuracy for consumers, and enhance customer experience through automation and AI‑driven insight, all underpinned by modern, cloud‑native architecture. ENSEK is at an exciting inflection point as we scale at pace towards new international horizons. If you’re driven by solving complex, real‑world problems and want to build modern technology that accelerates the global energy transition, you’ll feel right at home with us. About the role The customer Financial Assurance Manager leads the financial assurance relationship for our B2B clients, ensuring the delivery of accurate energy accounting outputs, high-quality revenue assurance and regulatory reporting. This role acts as the primary financial point of contact, providing strategic insight, commercial guidance, and assurance over financial performance across complex energy portfolios. Key responsibilities: Own the financial relationship with assigned B2B clients, acting as their trusted advisor on energy accounting and revenue assurance matters. Oversee the delivery of monthly financial outputs, including revenue recognition, gross margin, reconciliations, variance analysis, and controls reporting. Review and challenge analytical work produced by the Customer Financial Assurance team, ensuring accuracy, completeness, and clarity before client submission. Provide commercial insight into consumption trends, billing performance, and financial risks, translating technical data into clear, actionable recommendations. Lead client meetings, presenting financial results, performance commentary, and improvement opportunities. Collaborate with operations, billing, data, and product teams to resolve issues, improve data quality, and strengthen financial controls. Line management responsibility for Customer Financial Assurance Analysts. Drive continuous improvement initiatives across financial assurance processes, reporting, and client engagement. Competency Requirements: Behaviours: Leads a team to deliver objectives with accountability for outputs and outcomes Provides regular feedback, coaching and career development support Balances day-to-day operational delivery with incremental improvements Escalates challenges thoughtfully, with proposed solution Helps team stay focused and productive in periods of uncertainty Knowledge: Deep subject matter knowledge within their domain, Data, Industry & Accounting Designs workflows, processes and team structures that drive efficiency Competent in using reporting/analytics tools to track and communicate performance Understands compliance, governance and operational standards Adapts systems and processes as ENSEK needs to evolve Experience required: Strong background in finance, accounting, or commercial analysis, ideally within the energy or utilities sector. Proven experience managing client relationships and presenting financial insights to senior stakeholders. Ability to interpret complex datasets and communicate findings clearly to nontechnical audiences. Strong leadership, influencing, and problem solving skills. Proficiency in Excel and financial reporting tools; experience with BI platforms is an advantage. Outstanding levels of diplomacy and ability to balance multiple considerations in contentious situations Experience in the complex workings of the energy market, ideally with large supply portfolios Appreciation of the idiosyncrasies of billing platforms and their deployments and how the interact and compare with industry positions. In depth knowledge of industry protocols, e.g. settlement mechanics, data flows, invoicing of Gross Margin costs Experience of Management Accounting, ideally with both B2C & B2B Energy Supply. Preferably CIMA qualified or studying towards it. Exhibits and encourage continuous learning, maintain sand enhance amassed knowledge and experience. Company Benefits 25 days’ holiday bank holidays Option to buy or sell 5 extra annual leave days per year Vitality Health Insurance, including private healthcare, virtual GP access, mental‑health support and wellbeing perks (50% off gym memberships -Virgin Active, Nuffield, PureGym) Pension with 5% matched contribution Regular team‑wide and company‑wide events 2 volunteering days per year to give back Remote‑first working environment with offices in London and Nottingham