Leadership
PAI has a diverse and complementary team. We are deliberately agile, with members of the leadership team highlighted below dedicated to your project. We have active expert involvement in all assignments ensuring the work produced is relevant to the expert opinion and within the expert’s direct control. Our team has worked together for more than 15 years on more than 200 assignments. We take pride in developing our efficient, tightknit, and agile teams.
Marianne C Ramey
President and Expert
Ms Ramey leads the PAI team as its founder and President, bringing extensive expertise in programming, critical path method scheduling, project controls, and project management. She is a recognised independent expert in analysing delays and their effects on large and complex construction and concession PPP projects.
With a background in various construction industry roles and significant experience in international dispute resolution forums, Ms. Ramey is an accredited Professional Engineer and Project Management Professional.
She provides leadership and direction to PAI’s construction delay specialists. Her qualifications include a Bachelor of Science in Civil Engineering, an MBA, a Master of Dispute Resolution, multiple professional memberships and fellowships, extensive public policy dispute resolution and mediation training, and testifying over 50 times in arbitration forums.
Mauricio Carrasco
Managing Director and Expert
Mr Carrasco, a Civil Engineer with 30 years of experience, brings extensive expertise in delay analysis, project management, and project controls to the PAI team. He has a strong background in designing and developing quantification models, preparing expert reports, and providing expert testimony, particularly in international arbitration proceedings.
His global experience spans various sectors, including power plants, transportation, marine, and buildings, and he has worked on complex projects across Europe, the United States, Asia, Africa, South America, and the Middle East. With a Bachelor of Science in Civil Engineering and a Master of Business Administration, Mr. Carrasco is adept at managing multidisciplinary teams and liaising with clients, attorneys, and site teams to deliver robust and intelligible solutions for forensic delay analyses. He is fluent in English, Spanish and Portuguese and conversational in German.
Andrew Parry
Managing Director PAI UK and Expert
Dr Parry brings over 30 years of extensive experience in the construction industry to the PAI team. He specialises in delay analysis and has a very successful record having testified as an independent expert in litigation, international arbitration, dispute review board, domestic arbitration and adjudication forums.
Dr Parry holds a PhD in Delay Analysis within Construction, a Master of Science in Construction Law and Arbitration, and is a Fellow of both the Royal Institution of Chartered Surveyors and the Chartered Institute of Arbitrators.
His expertise includes leading large professional teams and producing expert analysis on complex disputes across the wider construction industry, having worked on a large number of high-value projects, including transportation infrastructure, marine facilities, power plants, process plants and buildings. He is also leading a university-linked research team on BIM 4D modelling for delay and risk analysis.
Gary Potter
Managing Advisor
Mr Potter has 20 years’ experience in building and civil construction works and joined PAI in 2008. He is a Member of the Chartered Institute of Arbitrators. He has significant experience in the preparation of time and cost claims and expert reports for adjudication, arbitration, and other decision-making bodies.
Mr Potter has been engaged as an Independent Expert, both for Delay and Quantum fields, within adjudication proceedings in the UK. Mr Potter holds a Bachelor of Science degree with honours in Commercial Quantity Surveying and a Master of Law in Construction Law and Adjudication. He has excellent analytical and report writing skills and is an experienced Project lead, working with the client and managing the PAI team to deliver comprehensive analyses.
Roxani Tsirides
Managing Advisor
Ms Tsirides brings 24 years of extensive experience in the construction industry to the PAI team, specialising in forensic delay analysis across a diverse range of projects, including rail, road, energy, and building sectors. She excels in managing forensic analyses, interfacing with legal and technical experts, and ensuring clear, fact-based, and balanced written reports.
Her qualifications include a BEng (Hons) in Civil Engineering, an MSc in Construction Economics and Management, a Graduate Diploma in Law, and an LLM Master of Laws. Additionally, she is a registered professional engineer in Cyprus and a member of the Chartered Institute of Arbitrators, with advanced training in mediation and expert witness support. She is fluent in English and Greek.
Ertan Efe
Managing Advisor
Mr Efe brings over 16 years of civil engineering experience, with 12 years specialising in delay analyses, to the PAI team. As a Managing Advisor, he coordinates with the expert and supervises a team to prepare forensic delay analyses, ensuring high-quality work products.
His expertise includes critical path method techniques, forensic critical path analyses, and detailed technical analysis. He has a strong background in evaluating baseline schedules, formulating execution plans, and assessing project impacts.
Mr. Efe’s extensive project experience spans various sectors globally, and he has served as an expert in dispute proceedings. His qualifications include a BSc in Civil Engineering and a Post-Graduate Diploma in Construction Law and Arbitration. He is fluent in English and Turkish.
Maria Hinds
Senior Advisor
Ms Hinds has over 15 years’ experience in building and civil construction works and joined PAI in 2012. Her specialism is in the preparation of time and cost analyses, with specific skills related to project planning, data management and analysis and report writing as part of PAI’s forensic delay analysis team.
Ms Hinds holds a Bachelor of Science degree with honours in Architectural Technology and a Master of Law with Distinction in Construction Law and Arbitration. She has expertise in the management, interrogation and analysis of large data sets.
Rita Waked
Advisor
Rita Waked brings over ten years of experience in the construction industry to PAI’s forensic delay analysis team, where she supports the expert with her extensive background in project planning, technical skills in programming tools, and proficiency in handling large data sets.
Ms. Waked’s expertise spans various complex projects globally, including transportation, hydroelectric power plants, and mass transit. She holds a Bachelor of Engineering Degree in Civil Engineering and is certified as a Project Management Professional (PMP) and a Planning and Scheduling Professional (PSP). She is fluent in English, French, and Arabic.
Raleigh Malubay
Senior Analyst
Mr. Malubay’s expertise supports the expert on construction arbitrations with his extensive experience in forensic delay analysis. He assists the expert in identifying and analysing project delays using critical path method techniques, the causes and impacts of delays, and validating project programmes.
His ability to gather and synthesise large amounts of data, create detailed progress databases, and explain changes in project timelines provides crucial foundational analysis. He has over eighteen years of experience with P6 as an on-site scheduler/planner/engineer and in a forensic analysis role. He holds a Bachelor of Science in Civil Engineering and is a registered engineer in the Philippines. Awarded Top Filipino Engineer/Architect 2025 in the Middle. He is fluent in English and Tagalog.
Rodrigo Zabala
Graphics Specialist and Analyst
Rodrigo Zabala is the visual communication specialist at PAI. With over 22 years of experience in graphic design, visual, and corporate communication, he excels in interpreting complex ideas and ensuring that the expert’s analysis is clearly understood. His expertise lies in creating graphics and illustrations that not only communicate technical issues effectively but also highlight the time context of events. As a telecommunications engineer specializing in visual communication, Rodrigo combines his technical skills with expressive curiosity, bringing a fresh and innovative perspective to every project..