Our client are seeking a Senior M&E Quantity Surveyor to join a dynamic and growing construction consultancy based in Farringdon. You will be working on high-profile commercial, mixed-use, fit-out, and mission-critical projects across London and the South East, taking full ownership of mechanical and electrical cost management through all RIBA stages.

This is an opportunity to join a collaborative, modern consultancy that values technical excellence, client relationships, and work-life balance.

Key Responsibilities:

Lead the cost planning and procurement process for M&E packages

Conduct cost estimates, BOQs, and tender documents for mechanical, electrical, and public health systems

Manage post-contract commercial responsibilities, including valuations, change control, variations, and final accounts

Provide value engineering advice and ensure robust commercial risk control

Collaborate with project managers, architects, engineers, and clients to deliver coordinated and commercially sound solutions

Lead or support client meetings and provide regular financial reporting

Assist in mentoring junior surveyors and providing technical guidance

Ensure compliance with contracts such as JCT, NEC3/4.

Requirements:

5-10+ years' experience in quantity surveying with a strong focus on M&E services

Previous experience in a consultancy/PQS environment

Degree qualified in Quantity Surveying, Building Services, Engineering or equivalent

Demonstrable experience managing M&E packages on commercial / fit-out / mixed-use projects

Strong working knowledge of procurement, estimating, and post-contract administration

Familiarity with MEP measurement techniques (e.g. SMM7, NRM2/3, CESMM)

Confident in client-facing situations and team leadership

UK right to work

Benefits:

Competitive base salary + annual performance bonus

Private healthcare and enhanced pension

Hybrid working (typically 3 days in office/client sites)

Generous holiday allowance (25 days + bank holidays)

Funded CPD, professional memberships (e.g., RICS)

Clear career progression in a flat-structured, meritocratic environment

O'Neill and Brennan values diversity and promotes equality, All individuals will be treated in a fair and equal manner and in accordance with the law regardless of gender, marital status, race, religion, colour, age, disability or sexual orientation