EXPERTS IN QUANTUM & DELAY

A trusted partner to leading organisations worldwide

gb² is a specialist consultancy providing expert advisory in construction and engineering. Founded in 2012, we offer cost management, claims valuation, and delay analysis, supporting clients with independent expertise in project delivery and dispute resolution. gb² operates internationally through offices in the UK, Australia, New Zealand, and Dubai.

Influence in Outcomes

Our Clients

Owners. Contractors. Lawyers. Consultants.
We support clients across infrastructure, energy, transport, and building sectors worldwide. Whether resolving disputes or preventing them, our role is to deliver independent, forensic advice that stands up to scrutiny.

Our Impact

gb² has provided tribunal-preferred findings on high-value disputes across infrastructure, energy, transport, utilities, and major building projects globally. Our expert analysis is frequently cited in judgments and awards as having helpfully distilled complex issues at the heart of the dispute. With a proven record in litigation, arbitration, adjudication, and mediation, we are trusted for our impartiality and attention to detail.

Why gb²?

At gb², we provide independent, evidence-based advice supported by extensive experience in construction and engineering disputes. Our work is grounded in forensic analysis and clear communication, enabling us to assist clients, counsel, and tribunals with confidence. With a global presence across the UK, Australia, New Zealand, and the UAE, we combine international reach with focused technical knowledge to provide clear, robust advice on complex construction and engineering disputes. We focus on delivering reliable, defensible opinions that stand up to scrutiny.  Our values in excellence are reflected in independent recognition, with multiple partners consistently ranked in leading directories such as Lexology’s arbitration and consulting expert listings.

Reach Out, We’re Here to Help You

Project Highlights

Wellpads

Data Centre

Twin Towers

Drill Ships

Windfarm

Expert Team
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Offices Globally
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Cross Examinations
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Trusted Advisors in Cost, Delay, and Claims Analysis

Client comments

Wendy MacLaughlin,
Consulting expert
"Wendy MacLaughlin stands out in the international construction market for her expert delay analysis on major projects. Our market sources unequivocally agree that "she is one of the best delay experts in the market"
Colin Byford,
Consulting expert
"Colin Byford is "a leading star in the industry", recognised for his excellent independent expert quantum witness testimony and "ability to get to the point very quickly"
Charles Gurnham,
Senior Partner
"Charles Gurnham is a go-to name in the construction industry, and the founder of gb2. Charles lends his expertise to contractors in international complex engineering and building projects, with a speciality in forensic examination."
Derek Sharp,
Senior Partner
“Derek is especially versed in delay and disruption analysis, as well as planning and design management"
Conrad Bromley,
Senior Partner
"Conrad is well-known and highly regarded in the Dubai construction market"
Ahmed Elkordy,
Partner
"With close to 20 years of experience, Ahmed Elkordy remains a favourite with his peers and clients who praise his drafting skills and ability to simplify complex delay matters."
Mark Keeton,
Partner
"A rising star", Mark Keeton receives market commendation for his "detail-oriented and hard-working approach". Mark is a seasoned quantum expert acting on construction projects across a wide array of sectors.
John Fagan,
Partner
"John Fagan comes highly recommended for peers and clients alike for "his initiative in ensuring efficient delivery of comprehensive reports" in complex disputes involving delay matters."

Meet the Team

Clarity in Evidence. Confidence in Advice