Junior / Assistant Mechanical Estimator | Building Services | Southampton area | £35,000 £50,000 + Training + Career ProgressionThis is a fantastic opportunity for an ambitious Junior Mechanical Estimator to join a respected M&E Building Services contractor delivering projects from £100k to £5m, with structured training and a clear pathway into a fully-fledged Mechanical Estimator role.About the CompanyThe company is a well-established M&E Building Services contractor delivering mechanical and electrical installations across commercial, healthcare, education, industrial, leisure, and public sector environments. Known for their technical capability and consistent project delivery, the business has developed strong long-term relationships with clients across the South Coast and surrounding regions.Pre-construction is a key function within the organisation, and the business is committed to developing future talent within its estimating team. This role offers structured mentoring, hands-on training, and exposure to a wide variety of building services projects, providing an excellent foundation for a long-term career in estimating.The RoleAs Junior Mechanical Estimator, you will support the pre-construction team in preparing mechanical building services tenders while learning the full estimating process from experienced professionals within the business.You will assist in pricing HVAC systems, plantrooms, heating systems, ventilation, chilled water systems, pipework, and public health installations across a varied portfolio of building services projects.Projects typically range from £100k through to larger multi-million-pound installations across sectors such as commercial, healthcare, education, industrial, and fit-out.You will gain exposure to the full tendering lifecycle, working closely with experienced estimators, project managers, and company directors. This will include reviewing tender documentation, interpreting mechanical drawings and specifications, analysing supplier quotations, and contributing to commercially robust tender submissions.This role would suit candidates currently working as: Junior Mechanical Estimator, Assistant Mechanical Estimator, Mechanical Estimating Assistant, Mechanical Building Services Engineer, or Mechanical Engineer seeking a transition into estimating.Key ResponsibilitiesAssisting in the preparation of mechanical building services tenders from drawings and specificationsSupporting take-offs and measurements from mechanical drawingsPricing HVAC systems, heating, ventilation, pipework, plantrooms, and public health servicesObtaining and reviewing supplier and subcontractor quotationsSupporting cost planning and tender submissionsAssisting with internal tender reviews and commercial discussionsSupporting project handover documentation following successful tendersAs your experience develops, you will progressively take on greater responsibility for pricing and managing your own tenders.About YouMechanical Building Services backgroundBasic understanding of HVAC, pipework, and mechanical systemsStrong numeracy and attention to detailAmbitious and motivated to build a long-term career in estimatingComfortable working in an office-based environmentExperience using estimating software such as Ensign would be advantageous but not essentialIdeally you will have some exposure to Mechanical Building Services projects or installations within sectors such as commercial, healthcare, education, industrial, or fit-out environments.Engineers or mechanical tradespeople currently working on the tools who are looking to transition into an office-based estimating role are encouraged to apply. Full training and mentorship will be provided.Remuneration Package Junior Mechanical Estimator£35,000 £50,000 (dependent on experience) Company Pension 25 Days Holiday + Bank Holidays Structured Training and Career Development Long-Term Progression into Mechanical EstimatorNext StepsPlease apply online today, or contact Rob at David Leslie Ltd for an informal and confidential discussion.About David Leslie LtdDavid Leslie Ltd is a family-run construction recruitment consultancy with over 20 years experience connecting professionals and employers across the UK. Specialising in the Building, Fit-Out, and M&E Building Services sectors, our approach is built on trust, integrity, and long-term partnerships, ensuring both clients and candidates receive a service that is personal, transparent, and expertly delivered.JBRP1_UKTJ