Senior Mechanical Estimator Salary: £85,000 – £95,000 Location: West London / Hayes (Office-based) + site visits as required (all London based sites) Type: Full-time, permanent Benefits: Company pension, Cycle to Work Scheme, Life Insurance, Employee Assistance Programme (EAP) A leading Building Services Contractor is seeking an experienced Senior Mechanical Estimator to join their growing pre-construction team. This is a senior role within an established M&E business, offering long-term stability, strong career progression, and the chance to influence and improve estimating processes across multiple projects. The Role As a Senior Mechanical Estimator, you will play a key part in securing new business and ensuring tenders are prepared accurately, competitively, and in line with company standards. Responsibilities include: * Preparing, analysing and submitting mechanical tenders across a diverse range of building services projects. * Carrying out detailed take-offs, cost build-ups, and analytical estimating. * Reviewing tender documentation, drawings, specifications and contractual requirements. * Managing supplier and subcontractor enquiries to obtain competitive and compliant quotations. * Identifying risks, opportunities, and value-engineering options during pre-construction. * Liaising with internal teams, senior leadership, clients, consultants, and supply chain partners. * Pres...