Juan Olwagen

Associate Director

Juan Olwagen is a quantity surveyor and quantum expert witness who has over fifteen years of experience working in private practice and for contracting organisations in the construction, oil and gas, infrastructure and power generation industries.

Juan Olwagen’s construction experience includes major onshore oil and gas process plants (liquefied natural gas (LNG), refineries and process plants), offshore drilling platforms, coal-fired power stations, nuclear power stations, renewables (solar and offshore wind), desalination plants, hotels and resorts, hospitals, malls and high-rise residential developments.

Mr. Olwagen has extensive working knowledge of major domestic and international contract forms—including the International Federation of Consulting Engineers (FIDIC), New Engineering Contract (NEC) and Joint Building Contracts Committee (JBCC)—in addition to bespoke engineering, procurement and construction (EPC) forms of contract.

For the past decade, Mr. Olwagen has focused on providing quantum expert services. He specialises in claims for extension of time and additional payment due to delay and prolongation, disruption, termination, finance and interest claims, as well as valuation of variations.

Mr. Olwagen has been instructed as quantum expert on numerous occasions and has testified by way of cross-examination and witness conferencing (hot-tubbing) in Dubai International Financial Centre–London Court of International Arbitration (DIFC-LCIA), International Chamber of Commerce (ICC), Dubai International Arbitration Centre (DIAC) and ad hoc matters in the United Arab Emirates, Jordan and South Africa.

Employment History

BRG
Associate Director, 2023 – present

JS Held
Director, 2019 – 2023

HKA
Senior Consultant, 2017 – 2019

Hill International
Managing Consultant, 2015 – 2017

Aveng Grinaker-LTA
Quantity Surveyor, 2012 – 2015