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Roger ter Haar KC

Call 1974 • KC 1992

“He is very experienced, hugely well known and hugely well respected. He has a massive following globally.”
(Chambers & Partners)


Roger has extensive experience of arbitrating acting as counsel in construction and engineering disputes both within the UK and internationally. Cases in which he has been involved as arbitrator or counsel include disputes relating to projects in Afghanistan, Australia, Bahrain, Bangladesh, Eire, Dubai, Bulgaria, Gibraltar, Hong Kong, India, Indonesia, Jersey, Kuwait, Qatar, Pakistan, Saudi Arabia, Taiwan, Tanzania and the United States of America.

He has been appointed as sole arbitrator or chairman of arbitral tribunals by the LCIA, the ICC and DIAC.

As counsel, his clients have included Governments, Local Authorities, other Employers, Contractors, Sub- Contractors and professionals. He has acted as Counsel for Claimants and Defendants in numerous professional negligence cases arising out of allegations of negligence against architects, engineers and quantity surveyors.

Selected Cases


Roger has a wealth of experience sitting as arbitrator in major international arbitration disputes. Some selected cases are detailed below:

  • (As party appointed arbitrator) A claim for US $50M plus arising out of a project in Sudan. The issues involved the effect of sanctions upon payment of Bills of Exchange.(ICC)
  • (As Chair) A claim for US $215M in respect of an oil pipe line dispute in Africa.( Ad hoc under UNCITRAL rules)
  • (As party appointed Arbitrator) A claim for US $600M arising out of an LNG project in Australia.(ICC) (As party appointed arbitrator) A claim for the equivalent of £200M arising out of a construction project in Dubai. (DIAC)
  • (As sole arbitrator): A claim for a sum to be defined in respect of a power station project in the Dominican Republic (Ad hoc)
  • (As party appointed arbitrator): A claim for US $40 million in respect of a power station in Jordan (SIAC).
  • (As party appointed arbitrator): A claim and cross-claim totalling £540m arising out of a software system for the UK Government (sitting with two retired High Court Judges) (LCIA)
  • (As sole arbitrator): Claim concerning a dredging and reclamation project in Oman (ICC)
  • (As party appointed arbitrator) US $245M Share Agreement dispute concerning a port in Russia (LCIA)
  • (As party appointed arbitrator): An AED 800M dispute concerning an airport project (ADCCAC)
  • (As Chair): A dispute concerning as car park project in Doha (QICCA)
  • (As Chair): A SAR 250M dispute concerning a petrochemical project in Saudi Arabia (ICC)
  • (As Chair): Shipbuilding dispute (LCIA)
  • (As Chair) A dispute between a South Korean Corporation and an Algerian company concerning a refinery in Algeria (LCIA)
  • (As party appointed arbitrator) A US $ 500M dispute concerning a dredging and reclamation project in the Philippines (SIAC)
  • (As sole arbitrator) Dispute as to barrister’s negligence (UK Bar Council scheme)
  • (As sole arbitrator) HK $100M dispute as to solicitor’s indemnity coverage (HK Solicitors’ scheme) (As sole arbitrator) Dispute as to reliability of rolling stock (RIDR)
  • (As chair) OMR 7.7M dispute as to a hotel project in Oman (Ad Hoc) (As chair) US 53M share purchase agreement dispute (LCIA-DIFC)
  • (As party appointed arbitrator) US 10 million dispute in respect of oil tank farm (ICC) (As Party appointed arbitrator) dispute in respect of a transport project (ICC)
  • (As sole arbitrator) Insurance dispute concerning business interruption losses (ad hoc)

Dispute Adjudication Board

  • (DAB member) Acted as part of a three man panel in disputes arising out of a dredging contract at an East African port.
  • (DAB Member) Acted as part of a three man dispute panel in respect of a power station in South Africa (and two other pending similar DABs)
  • (Chair of DAB)  Chairman of permanent dispute boards in respect of a wind farm project offshore the United Kingdom
  • (Chair) DAB concerning a cement plant in Nigeris


  • Acted as Sole Adjudication Board member in a dispute between Contractor and Employer arising out of the design, construction and outfitting of 3 Police stations in the Caribbean. (FIDIC Yellow book)
  • Acted as Adjudicator in a dispute regarding delay in design and construction of a PFI waste to energy facility.
  • Acted as Adjudicator on multiple related disputes relating to a new motorway.
  • Appointed Adjudicator in substantial defects dispute in respect of a major PFI hospital project.
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  • Felsted
  • Magdalen College, Oxford
  • BA Jurisprudence 1973
  • Became Bencher of Inner Temple 1993
  • (1995-1999: Chairman, Inner Temple Estates Committee)


  • Hong Kong International Arbitration Centre Panel of Arbitrators (2013)
  • The Korean Commercial Arbitration Board Panel of International Arbitrators (2013)
  • Chairman, Inner Temple Estates Committee (1995 – 1999)
  • Former Chairman Lloyds Disciplinary Committee


“Roger is very self-sufficient. He’s very good at just getting a job and getting stuck in, which makes it very easy to work with him.”… “Roger is very focused on merit and very, very clever.”

Chambers & Partners, 2024

‘One of the most experienced and sharpest minds at the construction Bar. He is bright, insightful, tactically astute and gets up to speed on the most complex factual and technical issues quickly.’

Legal 500, 2024

“Roger ter Haar’s advocacy and ability to deal with the unforseen, thinking on his feet, are really an object lesson in the art.”

Chambers & Partners, 2023

‘Excellent advocate and superb presentation in a very subtle way including his cross examination skills.’

Legal 500, 2023

“He is very experienced, hugely well known and hugely well respected. He has a massive following globally.”

Chambers & Partners, 2022

“His key strength is his eagle-eye attention to detail, packaged with his extensive years of experience that elevates him to a status of a true specialist in his field. Arbitrators and judges listen attentively when he speaks.”

Legal 500, 2022

“Very intelligent and accessible, he is liked by his solicitors and lay clients – a great guy.”

Legal 500 EMEA, 2021

“He offers a good mix of commercial and construction expertise in addition to being very strong on his feet. He’s just a pro in a courtroom.”; “He is consistently excellent to deal with.”

Chambers & Partners, 2021

“He is one of the finest cross-examiners practising at the English Bar.”; “Remains at the top of his game – conducted himself at hearings with a poise and eloquence that few others possess in my experience.”; “Hardworking and always a pleasure to deal with, he is more inclined to be one of the team than many senior barristers.”; “Has an ability to cut through and focus on the important issues. Hard-working and always a pleasure to deal with.”

Legal 500, 2021

“His instincts in understanding how to present disputed issues to a tribunal are brilliant. “

Legal 500 EMEA, 2020

“Has a wealth of experience, and is an impressive advocate who can quickly get the measure of a witness or tribunal.”

Legal 500, 2020

“An impressive advocate who can quickly get the measure of a witness or tribunal and tailor his cross-examination accordingly.”

Legal 500, 2020

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