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Thought Leader

WWL Ranking: Global Elite Thought Leader

WWL says

John Mullen earns plaudits as “a standout quantum expert with international experience” in large-scale construction disputes.

Questions & Answers

John Mullen is a chartered quantity surveyor and civil engineering surveyor with over 40 years’ experience, and one of the founders of Driver Group plc, and now a main board director. He is one of the world’s leading quantum experts, working in many different jurisdictions, on matters ranging up to US$2.75 billion in dispute. He is co-author of the books Evaluating Contract Claims and The Expert Witness in Construction, and has been ranked as a Global Elite Thought Leader by Who’s Who Legal since 2018.

Describe your career to date. 

My career started with contractors, and then moved into consultancy. Overall I have been practising in excess of 40 years. 

What is it about your role as an expert witness that you enjoy most?

The variety, size and complex nature of the projects involved. Helping tribunals, judges and arbitrators tackle complex technical issues and to reach judicious decisions that fairly reflect the parties’ entitlements. 

What qualities make for an effective construction expert witness in contentious proceedings? 

Independence, gravitas and intellect.

How has the market changed since you first started practising?

Some markets, for example the UK, have become more pragmatic in terms of settling disputes or resolving through alternative processes such as mediation and adjudication. Internationally, in many jurisdictions, the expert market has also become more sophisticated, with greater understanding of the duties of an independent expert.

How does your background as a quantity surveyor and civil engineer enhance your current practice? 

40 years’ experience of the industries means that I have a thorough understanding of the details of quantum in relation to construction and engineering projects. It also means that generally I find tribunals acknowledge that experience and believe that my evidence carries some credibility as a result.

What did you find most difficult about entering practice as a construction expert? 

Getting started with a first case as the testifying expert, rather than working as assistant to an experienced expert. Parties and their lawyers can be understandably reluctant to appoint an expert who does not have previous testifying experience.

What impact will technological innovation have on the construction industry over the next five to 10 years? 

BIM is a particularly interesting area. The extent to which it will prevent disputes waits to be seen. However, properly used it can certainly be expected to help with forensic analysis of projects and the records required in efficient and economical dispute resolution.

What are the greatest challenges the construction industry faced with the advent of covid-19?

Access to sites and resources such as people and materials. It has also affected the confidence of many employers as to the viability of projects, with projects suspended and some still not resumed and may never. Increased health and safety measures have also affected efficiency and costs. 

Thought Leaders - Construction Experts 2020

Q&A

WWL Ranking: Thought Leader

WWL says

John Mullen earns plaudits as “a standout quantum expert with international experience” in large-scale construction disputes.

Questions & Answers

John Mullen is a chartered quantity surveyor and civil engineering surveyor with over 40 years’ experience, and one of the founders of Driver Group plc, and now a main board director. He is one of the world’s leading quantum experts, working in many different jurisdictions, on matters ranging up to US$2.75 billion in dispute. He is co-author of the books Evaluating Contract Claims and The Expert Witness in Construction, and has been ranked as a Global Elite Thought Leader by Who’s Who Legal since 2018.

Describe your career to date. 

My career started with contractors, and then moved into consultancy. Overall I have been practising in excess of 40 years. 

What is it about your role as an expert witness that you enjoy most?

The variety, size and complex nature of the projects involved. Helping tribunals, judges and arbitrators tackle complex technical issues and to reach judicious decisions that fairly reflect the parties’ entitlements. 

What qualities make for an effective construction expert witness in contentious proceedings? 

Independence, gravitas and intellect.

How has the market changed since you first started practising?

Some markets, for example the UK, have become more pragmatic in terms of settling disputes or resolving through alternative processes such as mediation and adjudication. Internationally, in many jurisdictions, the expert market has also become more sophisticated, with greater understanding of the duties of an independent expert.

How does your background as a quantity surveyor and civil engineer enhance your current practice? 

40 years’ experience of the industries means that I have a thorough understanding of the details of quantum in relation to construction and engineering projects. It also means that generally I find tribunals acknowledge that experience and believe that my evidence carries some credibility as a result.

What did you find most difficult about entering practice as a construction expert? 

Getting started with a first case as the testifying expert, rather than working as assistant to an experienced expert. Parties and their lawyers can be understandably reluctant to appoint an expert who does not have previous testifying experience.

What impact will technological innovation have on the construction industry over the next five to 10 years? 

BIM is a particularly interesting area. The extent to which it will prevent disputes waits to be seen. However, properly used it can certainly be expected to help with forensic analysis of projects and the records required in efficient and economical dispute resolution.

What are the greatest challenges the construction industry faced with the advent of covid-19?

Access to sites and resources such as people and materials. It has also affected the confidence of many employers as to the viability of projects, with projects suspended and some still not resumed and may never. Increased health and safety measures have also affected efficiency and costs. 

Global Leader

WWL Ranking: Recommended

Peers and clients say

"He is a distinguished and honest quantum expert"
"He is highly recommended - my go-to choice if I am conflicted"

Biography

John Mullen is a chartered quantity surveyor and civil engineering surveyor with over 40 years' experience across buildings, infrastructure, civil engineering, energy, oil and gas and process projects. 

He was one of the founders of Driver Group and is now a main board member.

As one of the world’s leading quantum experts, he has had over 70 expert witness appointments in many different jurisdictions across the world, including, Africa, the Americas, Europe, the Middle East and the United Kingdom. Matters appointed on have ranged in value up to US$2.75 billion in dispute.

John has been cross-examined on many occasions, several times in the hot tub. He has been cross-examined by specialist construction senior counsel, including some of the UK’s top specialist Queen’s Counsel.  Evidence has been given to tribunals including some of construction’s most eminent judges and arbitrators.

John is co-author of the books Evaluating Contract Claims and The Expert Witness in Construction.

He is recommended in WWL Thought Leaders (2018 and 2019) and WWL Global Elite Thought Leaders (2019 and 2020).

WWL Ranking: Global Elite Thought Leader
WWL Ranking: Recommended

WWL says

John Mullen earns plaudits as “a standout quantum expert with international experience” in large-scale construction disputes.

Biography

John Mullen is a chartered quantity surveyor and civil engineering surveyor with over 40 years' experience across buildings, infrastructure, civil engineering, energy, oil and gas and process projects. 

He was one of the founders of Driver Group and is now a main board member.

As one of the world’s leading quantum experts, he has had over 70 expert witness appointments in many different jurisdictions across the world, including, Africa, the Americas, Europe, the Middle East and the United Kingdom. Matters appointed on have ranged in value up to US$2.75 billion in dispute.

John has been cross-examined on many occasions, several times in the hot tub. He has been cross-examined by specialist construction senior counsel, including some of the UK’s top specialist Queen’s Counsel.  Evidence has been given to tribunals including some of construction’s most eminent judges and arbitrators.

John is co-author of the books Evaluating Contract Claims and The Expert Witness in Construction.

He is recommended in WWL Thought Leaders (2018 and 2019) and WWL Global Elite Thought Leaders (2019 and 2020).

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