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Who's Who Legal
Who's Who Legal

Global Leader

WWL Ranking: Recommended

Peers and clients say

“Mark’s attention to detail is particularly impressive”

“He presents complex areas of disputes in a straightforward, clear and concise manner for the benefit of the court”

“He maintains focus on the key issues of the case”


Mark Wearen is a Director and quantum expert at Blackrock Expert Services. He is a Chartered Quantity Surveyor (MSCSI/MRICS) and Chartered Civil Engineering Surveyor (MCInstCES) with over 33 years of cost and commercial management experience in the construction and engineering industry. He has been appointed as an expert on quantum and quantity surveying disputes on building, civil engineering and utility infrastructure projects in Ireland and internationally.

He has worked for contractors, employers and sub-contractors on both public and private sector projects. His project experience includes contracts procured using a range of procurement options including traditional, design and build, target cost, turnkey and PPP/PFI. He has extensive experience of the Irish Public Works suite of contracts as well as FIDIC, NEC, ICE/IEI, RIAI and JCT contract forms.

He has provided independent reports on claim risk and quantum for public and private sector clients and has been appointed as an expert witness on multiple occasions. Instructions taken include referrals to mediation; conciliation, arbitration, adjudication; and litigation. He has given evidence under cross examination and concurrently (“hot-tubbing”) in arbitrations, non-statutory adjudications and conciliations.

He holds a postgraduate diploma in construction law and administration and an MSc with distinction in construction law and practice.

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