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. * Presenting commercial and technical aspects of tenders for director-level approval. * Supporting handover processes to delivery teams with clarity and accurate documentation. * Contributing to the development of estimating systems, cost libraries and process improvements. * Mentoring and supporting junior team members where required. About You We’re looking for someone who brings: * Extensive experience in mechanical estimating within building services/M&E contracting. * Strong technical understanding of mechanical systems and installation methods. * Ability to interpret technical documents, drawings and specifications confidently. * Excellent commercial awareness and understanding of tendering processes. * Strong communication and negotiation skills with both internal and external stakeholders. * Proficiency in estimating software and Microsoft Excel. * A proactive, organised and detail-driven approach to managing multiple bids. What’s on Offer * Competitive salary £85–95k * Strong, stable company with a healthy project pipeline * Supportive senior leadership team and collaborative working environment * Opportunity to shape processes and contribute to business growth * Long-term progression within pre-construction and estimating