Our Consultants

Andy Marriss MCIOB. C.Build E MCABE. MICWCI

Consultant

Andy Marriss is a highly experienced construction professional with an extensive background in project and construction management, Clerk of Works services and quality control. Having worked across a wide range of sectors throughout the UK, Andy brings considerable practical knowledge of construction methods, workmanship, health and safety, design management and contract delivery.

Andy has extensive experience working as a Clerk of Works and NEC Supervisor, providing independent oversight of construction works and monitoring quality, progress and compliance with project requirements. His experience includes education, healthcare, student accommodation, hotels, commercial developments, residential projects, industrial facilities and rail infrastructure.

Before specialising in Clerk of Works and NEC Supervisor roles, Andy spent many years in project and construction management, taking responsibility for projects from pre-construction and design coordination through to delivery and completion. This has given him a thorough understanding of the challenges faced by clients, contractors and project teams, together with the practical experience needed to identify issues early and support effective solutions.

He has worked with a variety of contract forms, including JCT, NEC and bespoke contracts, including PFI projects. His experience encompasses site management, procurement, programme control, quality assurance, risk management, health and safety and the coordination of contractors and consultants.

Andy works alongside Brant Construction Quantum Experts when instructed to provide Contract Administration services. His extensive site experience and practical approach complement Brant’s commercial and contractual expertise, helping clients maintain control of their projects, uphold construction standards and address potential issues before they develop into more significant problems.

Andy Marriss - Consultant Construction Quantum Expert

Qualifications & Memberships:

  • MCIOB.
  • C.Build E MCABE.
  • MICWCI
  • SMSTS

  • DBS clearance
  • Previous BPSS security clearance for work at RAF Coningsby

Ian Brant says, “Andy’s combination of hands-on construction management experience and independent site oversight provides clients with a practical, informed approach to quality control, project delivery and Contract Administration.”

Brant construction quantum experts

Connect

Our involvement can range from guidance and advice, to full management and resourcing of a particular matter. If you would like a no obligation consultation about any issues you may have, or you would like more information about our services, call us on 01733 568687.

If your enquiry is not urgent or you would like to subscribe to our newsletter, please complete the enquiry form below.

BRANT CONSTRUCTION QUANTUM EXPERTS © 2026 | WEBSITE DEVELOPMENT BY WEBZEPPELIN