Jeffrey Kuehn

Jeffrey Kuehn is a mechanical engineer with more than 30 years of experience. He has been retained as a forensic technical expert on numerous occasions.

Jeffrey has testified in court, arbitration, and deposition. He has led teams in developing and executing investigations, report writing and legal preparation regarding best practise and measuring performance against established benchmarks.

Early in his career, Jeffrey led the design and construction of multi-million-dollar projects to deliver them on time and within budget. His responsibilities included preparing mechanical, electrical and plumbing (MEP) bids, overseeing MEP project development, performing quality assurance and quality control reviews of MEP documents, managing the performance of contractors, and training and supervising MEP personnel.

Jeffrey’s forensic engineering expertise includes HVAC, plumbing, and fire protection. He has evaluated sites of failure or accidents to identify origins and cause and provided expert reports for dispute resolution. He is a building information modelling (BIM) expert and is also adept at preparing and presenting technical materials for non-technical audiences.

Jeffrey is a registered professional engineer in Arizona, Arkansas, California, Colorado, Delaware, Florida, Georgia, Illinois, Iowa, Kansas, Minnesota, Missouri, Nevada, New Jersey, South Carolina, Texas, and Wisconsin. He is a National Association of Fire Investigations certified fire and explosion investigator.

Martin Leatham

Martin Leatham is a Chartered Architect with over 40 years of experience. He has been appointed as a technical expert on numerous occasions.

Martin has been cross-examined in international arbitration and provided concurrent evidence (hot-tubbing) on various large disputes in Asia Pacific. He has acted as the architectural expert, provided expert opinion, and delivered expert reports for a broad mix of buildings and infrastructure projects with disputed amounts in excess of $190 million.

Martin has extensive experience as a lead consultant and project manager for large and complex architectural teams and projects. He has led teams throughout all design and construction work stages particularly in hospitality, educational, commercial, retail, infrastructure, high speed rail, rail transit, and airport related projects.

Martin’s expertise ranges from building defects, compliance with statutory building standards and codes, architectural design, and design management and procedures to standards of materials and workmanship, contract administration, and potential negligence; as well as the impact of various procurement routes. He also provides design advisory expert opinion for clients regarding variations, defects, and incomplete work.

Martin is a member of the Royal Institute of British Architects and the Architects Registration Board of the UK. His is an associate member of the Singapore Institute of Architects and a certified quality system auditor for ISO 9001.

Jon Bird

Jon Bird is a Chartered Civil and Structural Engineer with over 25 years of experience. He has been appointed as a technical expert on more than 10 occasions.

Jon has testified as a witness of fact, prepared written expert evidence, and been in engaged in expert meetings for a variety of arbitration and adjudication proceedings. He has acted as an expert for disputes with values in excess of $400 million for large-scale industrial and commercial projects, as well as smaller residential projects.

Jon has an extensive background in both the design and project management of diverse projects. These range from buildings and utilities to basements, retaining walls and infrastructure. His sector experience covers residential, industrial, commercial, retail, rail buildings, healthcare, blue light, waste management, hotels, education and higher education, temporary works, refurbishment, and restoration. He has worked across the lifecycle of projects and their design and construction processes, from feasibility through to project completion.

Jon specialises in the assessment of structural issues affecting the delivery of complex projects. His wide-ranging knowledge of materials and construction techniques, including temporary works, enables him to holistically assess the impact of structural decisions on a project.

Jon is a fellow, a chief examiner, and examinations panel member of the Institution of Structural Engineers, a fellow of the Institution of Civil Engineers, and a reviewer for their professional review. He holds an advanced professional award in expert witness evidence.

Francisco J. Matta

Francisco Matta is an architect with almost 30 years of experience. He has been appointed as the lead expert on 21 occasions.

Francisco has served as an expert witness for construction disputes in state and federal courts, arbitration panels, and mediation forums in the United States and Latin America in English and Spanish. He has testified on matters on projects valued up to US$39.5 million.

Francisco has extensive experience as an architect directing all aspects of the design and construction and administration process for a multitude of projects throughout the northeastern United States and the Caribbean. His design experience includes institutional buildings courthouses, educational facilities, commercial establishments, warehouses, residential developments and individual homes.

Francisco specializes in standard of care, construction defects, and schedule and delay analysis for large-scale construction projects. He also has experience in disputes related to wrongful termination change order impacts, errors and omissions, Americans with Disabilities Act, code compliance and adherence to contract terms and conditions.

Francisco is a Registered Architect in Arizona, Florida, Georgia, Kentucky, Massachusetts, Puerto Rico and Texas, a Certified General Contractor in Florida, and holds a master’s in architecture and a Juris Doctor. He is a member of the American Institute of Architects (AIA) and the National Council of Architectural Review Boards (NCARB). He has lectured in areas such as government contracting, differing site conditions, and the challenges of coastal design and construction.

Seyran Celik

Seyran Celik is a civil engineer with more than 15 years of industry experience. She has been appointed as an expert in delay, quantum and technical matters.

Seyran Celik is renowned for her expertise in delay and quantum matters in high-stakes and global projects. She is regularly sought after to provide reports for international arbitration and litigation proceedings, with sources saying, “Seyran’s analysis is well thought out and presented in a way that is easy to understand.”

Lexology Index – Consulting – Construction – Quantum, Delay and Technical

Seyran has undertaken expert analysis, written expert reports and assisted the named expert for disputed projects with values of up to $1 billion. She has provided expert services for international arbitration, litigation and mediation and has delivered sworn testimony at deposition.

Seyran has significant project management and design experience as a geotechnical engineer. She has provided services relating to preconstruction phase feasibility studies, damage studies, remediation solutions, subsurface investigations, and environmental assessments. Her international work consists of government contracts and embassy work, defense and military, transportation, infrastructure, healthcare, education, wastewater, and commercial high-rises.

Seyran’s expertise includes analysis of shallow and deep foundations, slope stabilization, ground improvement, and roadways. She has been retained as a delay and disruption professional by local and international contractors, owners, architecture and engineering firms, and law firms. She has also assisted internationally acclaimed delay and quantum experts on multibillion dollar oil and gas, power, transportation and commercial projects across Australia, Europe, Africa, and the Americas.

Seyran is a member of the Association for the Advancement of Cost Engineers, the Project Management Institute, the American Bar Association, Arbitral Women, and the Society of Construction Law. She currently serves as president of the AACE Greater Miami Chapter, committee chair of the HKA Americas Equality, Diversity and Inclusion Initiative, and regional director for the Society of Construction Law Florida Chapter.

Seyran’s analysis is well thought out and presented in a way that is easy to understand. She is organized and performs very well under pressure.

Lloyd Watson

Lloyd Watson is a licensed pilot with 40 years of experience. He has been appointed as an aviation technical expert on more than 40 occasions.

Lloyd has been cross-examined in litigation on three occasions regarding various aviation operations, inflight incidents, and accidents. He provides expert evidence and reports regarding the root cause and contributory factors of the accident to provide a narrow focus on liability.

Lloyd is a former Royal Navy helicopter pilot, having spent more than 20 years flying offshore operations around the world. He has also flown for commercial airlines and acted as an operations director responsible for efficient and safe day-to-day operations. He subsequently qualified as an instructor and examiner and has also worked as an aviation advisor.

Lloyd specialises in accident analysis and the management of aviation risks. He is an expert in human factors analysis, as applied to the accident, and draws on a global network of experienced aviation experts as needed for further analysis and dispute resolution. His expertise as an air transport pilot incorporates both fixed wing and rotary aircraft.

Lloyd is a Master Air Pilot, Central Flying School A1 Instructor.  He is a fellow of the Royal Aeronautical Society and Liveryman with the Honourable Company of Air Pilots.

Michael Cuevas

Michael Cuevas is a registered Professional Engineer with more than 25 years of experience. He has been retained as a technical expert on more than 30 occasions.

Michael has been cross-examined in arbitration and at deposition for projects with disputed values of up to $800 million. He is a qualified, well-regarded expert and highly experienced in complex civil and structural engineering issues.

Michael’s expertise includes evaluating buildings and structures, reviewing and preparing structural repair drawings, conducting site condition assessments, recertifying buildings, and performing due diligence studies. He has also evaluated exterior and interior building envelope systems for defective construction, weather related damage, and impact damage. These systems include roof coverings, exterior wall claddings, interior ceiling finishes, interior wall finishes, and interior floor finishes.

Michael specialises in expert forensic structural analysis of buildings and structures damaged by fire, wind, floods, storm surges, explosions, tree impacts, vehicle impacts, freezing temperatures, hail, moisture intrusion, and construction defects, including catastrophe responses. He has worked on projects in the Caribbean, South America, and the United States.

Michael is a member of the Structural Engineering Institute, the American Society for Civil Engineers, and the National Council for Examiners for Engineering and Surveying. He holds a masters in structural engineering, a bachelor’s degree in civil engineering and is a Haag Certified Inspector for residential roofs.

Sarah Keyte

Sarah Keyte is a Chartered Construction Manager with more than 10 years of experience. She has been appointed as a technical expert and supported the named expert on numerous occasions.

Sarah brings a fresh innovative approach to solving construction challenges. She consistently delivers creative and effective solutions.

Lexology Index – Construction – Future Leader

Sarah has delivered building information modelling (BIM) expert analysis to support wider engineering and delay expert reports for disputed values of up to $40 million. She has been appointed or assisted experts in disputes from the United Kingdom, Europe, the Middle East, Asia, Oceania, South America, and North America.

Sarah has worked as a construction manager for both developers and main contractors. She has used BIM to prevent and resolve on-site delays in residential, commercial, and mixed-use projects in the UK and central Europe. As a 4D construction planner, she created and managed construction schedules and ensured the designs were coordinated.

Sarah specialises in BIM, information management, computer aided design (CAD), and 4D modelling. Her reports focus on design coordination, change analysis, and delay analysis using building information models. Sarah is a certified user of Synchro Pro (a 4D planning software which combines construction scheduling and BIM to create 4D build sequences) and evaluates whether BIM assets are compliant with their respective contract documents, standards, and BIM execution plans.

Sarah is a fellow of the Chartered Institute of Arbitrators and a member of the Chartered Institute of Building. She holds a master’s in construction law and dispute resolution, a degree in architecture, and has completed an advanced professional award in expert witness evidence with Legal Experience Training.

Sarah Keyte is recommended for “her ability to unlock technical issues where others appear unable to do so” and “her unrivalled expertise” in complex, high-value construction disputes. Her strong analysis supports engineering, delay, and quantum expert reports across global projects.

Alex Lee

Dr Alexander Lee is a Chartered Geologist and Scientist with over 25 years of experience. He has been appointed as a technical expert on more than 20 occasions.

Alexander acts as an expert for environmental matters including contamination, risk assessment, and remediation with disputed values of up to £700 million. He has been cross-examined in litigation and regularly provides expert opinion, analysis, and advice.

Alexander is experienced in both leadership and delivery of multi-disciplined environmental projects around the world and now leads HKA’s environmental offering. He has both consulting and contractor experience in non-radiological, radiological, private, and public sectors. With his various industry chair appointments, he regularly approves, inputs and comments on new guidance, proposed standards, policy, and thought leadership articles.

Alexander specialises in contaminated land investigation and liability assessment, risk assessments ranging from human health and vapours to water environment, and soil and groundwater remediation. He has provided opinion on claims for environmental damage and professional negligence; environmental appeals and inquiries; enforcement and prosecutions; permitting and consent issues.

Alexander is the current chair of the National Brownfield Forum (NBF) promoting the sustainable use of land in the UK, and chair-elect of the Association of Geotechnical and Geo-environmental Specialists (AGS). He is a registered Specialist in Land Condition (SiLC SQP), the former chair of the AGS contaminated land working group (CLWG) and a member of the National Land Quality Mark Steering (NQMS) Group that promotes and provides a reporting quality declaration scheme in the UK. He is also a chartership scrutineer for the Society of Brownfield Risk Assessors (SoBRA) and the Geological Society, including Chartered Scientists and Chartered Geologists; a member of the SoBRA technical review panel and the SoBRA NAPL working groups; a SoBRA accredited risk assessor (ASoBRA), one of just a few accredited under all four discipline headers – human health, permanent gasses, vapours, and controlled waters. Alexander is also a regular chair and presenter at both domestic and international conferences.

Simon Dean McCarroll

Simon Dean McCarroll is a civil engineer with over 25 years of experience. He has been appointed as the aviation expert on numerous occasions for multiple cases globally.

Simon Dean McCarroll is widely praised for his “impressive depth of technical knowledge” and “high level of experience” in transport-related matters. Sources add: “Simon always delivers a great result in the required time.

Simon acts as an expert witness and expert determiner for aviation disputes with a focus on airport planning, design, and engineering. He has supported clients on disputed projects across Europe, Asia and North and South America and is accredited by the Academy of Experts.

Simon has a wealth of practical and operational knowledge across international aviation projects as both an airport client and a consultant. He has assessed the design and constructability of aviation facilities (particularly in an operational airport environment) and is widely experienced in phased terminal and runway development, and in aircraft pavement maintenance management.

Simon specialises in airport development matters, including aviation project and design management, airport and airfield engineering, airport operations, terminal simulation, AutoCAD and PathPlanner-AviPLAN. His diverse experience includes completing projects based in Antarctica, where he worked with a blue ice runway and airfield.

Simon is a past chair of the British Aviation Group (Scotland Region) and a board member and associate practising member of the Academy of Experts. He holds a master’s in airport planning and management and has delivered various lectures regarding airport planning design and engineering bringing together technical theory with practical reality. His published work ranges from airport masterplans and feasibility studies to procurement strategies and simulations.

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