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.

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:

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• 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.
  

We're looking for someone who brings:

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• 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.
  

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• 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