Our Team

The professional backgrounds and the wealth of experience of our team to provide a unique and specialist advisory service.


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Sean O'Brien

  • Chartered Quantity Surveyor and a highly experienced Senior Quantity Surveyor/Commercial Manager.

  • Sean is Managing Director of the Middleton Barton Consultancy with a proven track record in a wide variety of construction projects.

  • Sean's previous senior positions included being the Commercial Director for an International Project Manager in the Middle East. Prior to that, a Partner in a successful Quantity Surveying practice in the UK.

  • His specialist experience runs from all pre- contract Quantity Surveying functions to post contract commercial management of both medium and large scale construction projects.

  • Experienced in property development from inception/feasibility to completion with a wide knowledge and understanding of all Project Management disciplines.


Mark Sayer

  • Chartered Quantity Surveyor and a director of the business

  • Mark is also Managing Director of Middleton LLC , a specialist Dubai based consultancy providing high level claims and contracts advisory services to Contractor’s and Clients in the UAE and Middle East.

  • Mark has worked in numerous senior positions for companies such as Damac Properties as Vice President of Claims and Disputes for their Middle East operations as well as working for Dar al Handasah as Head of Contracts for the Dubai International Airport. Prior to this, he established and successfully run corresponding businesses in the UK.

  • Brings a strong background of Contracts management and dispute resolution to the business where such skills allows projects to be set up correctly in the initial stages and for problems that arise to be managed quickly and effectively.

  • Acts in the capacity of expert witness on matters of dispute in the construction industry.