Ian Osbaldeston

Partner, Quantum Expert

Ian Osbaldeston

Partner, Quantum Expert

Ian is a chartered quantity surveyor with over 23 years’ experience in main contracting, consultancy and acting as an independent quantum expert witness. As a Partner of Blackrock Expert Services, Ian is responsible for all aspects of quality, delivery and performance and has delivered contentious, non-contentious and commercial management services across the world. After spending 7 years living in Dubai and heading the quantum team of a major consultancy, Ian is now based in London and takes appointments globally. Most recently he has been involved in disputes in Europe, MENA, Asia and the Commonwealth of Independent States.

A member of the Academy of Experts who is regularly appointed as an independent expert witness in quantum, Ian has given oral evidence in arbitration on ten separate occasions under ICSID, UNCITRAL, ICC, DIAC, LCIA and LMAA rules. He is experienced in ‘witness conferencing’ and recognised in Who’s Who Legal as a “first rate testifying expert” who “truly stands out with the perfect combination of substantive knowledge, preparation and communication skills”.

Ian provides opinion on the valuation of disputed variations, defective work, extension of time and terminated works as well as the financial impact of late payment. He has also previously valued the loss of potential profits as well as the financial impact of non-project related overheads.  Ian has working knowledge of most major forms of contract including FIDIC EPC, NEC, IChemE, ICE and JCT. His sector experience includes major infrastructure schemes, Airports, IT Special Airport Systems, Power, Process, Rail, Oil & Gas, Nuclear, Water, Marine, luxury commercial & residential properties.