Yanni Papapanagiotou
Chairman and Managing Director
ipap@systema.com.gr

Yanni Papapanagiotou is a Civil Engineer (National Technical University of Athens) and holds a Master’s degree in Logistics & Transportation (Cranfield University) and also another one in Economics (University of London).

In the past, he held senior positions in international Consulting Companies. Since 2007 he is the main shareholder, Chairman and Managing Director of Systema.

Pepi Dimopoulou
Chief Operating Officer
Member of the Board of Directors
p_dimopoulou@systema.com.gr

Pepi Dimopoulou is managing the day-to-day activities of Systema. She is a Civil Engineer (National Technical University of Athens) and holds a Master’s degree in Construction Management from Kingston University, UK.

Being a very experienced transport planner / engineer, Pepi has managed many projects internationally. Her expertise is mainly in the fields of national / regional / local transport master plans, sustainable urban mobility plans,feasibility studies for linear infrastructure projects, cost-benefit analyses, traffic management and traffic impact assessments, public transport and in project management.

Natalia Tselenti
Director – Western Balkans
Member of the Board of Directors
n_tselenti@systema.com.gr

Natalia Tselenti is a qualified transportation engineer with strong experience in infrastructure projects development and implementation. She holds a Master’s degree in Civil Engineering from the National Technical University of Athens, Greece, and in Logistics, Trade and Finance from Cass Business School, UK.

She is highly experienced in contract management, including management positions in large and complex transport projects. She has in-depth knowledge of transport infrastructure development in the Western Balkans region, where she has been working continuously since 2013.

Keith Cook
Member of the Board of Directors
k_cook@systema.com.gr

Keith Cook was previously Group Head of Business Development at WYG International (now Tetratech) and has more than 30 years high-level experience directing and managing large complex economic and infrastructure development projects in transition economies.

Brings an in-depth understanding of infrastructure and capacity-building projects internationally through experience in management and direction of many donor funded technical assistance programmes.

Skilled in development of effective Project Management Unit functions for implementation of large, multi-component, complex technical assistance programmes.
Skilled and experienced in knowledge transfer and design of counterpart development programmes.

Gordon Lamond
Member of the Board of Directors
g_lamond@systema.com.gr

Gordon Lamond has 30+ years of experience in the management of large-scale, international, infrastructure technical assistance assignments.

Formerly Director of Major Projects for WYG International (now Tetra Tech), responsible for management and quality assurance of infrastructure technical assistance projects. Furthermore, he was formerly Director, Infrastructure and Environment, for global engineering company FaberMaunsell – now AECOM; all involved managing multi-disciplinary teams made up from different cultures. Sector expertise includes environment, transport, energy and social

Areti Sakareli
Technical Director

Areti Sakareli leads Systema’s technical operations with over 20 years of experience in railway infrastructure projects across Europe, the Middle East, and North Africa. Her expertise combines high-level project management with deep technical knowledge in railway systems and transport infrastructure development.

As Technical Director, she oversees major infrastructure projects including the €150M Stalac-Kraljevo-Rudnica railway modernization in Serbia and strategic railway developments in Egypt. Her expertise spans railway infrastructure design, technical assistance for international financial institutions, and implementation of complex transport projects. She brings particular strength in managing multinational teams and ensuring compliance with international technical standards.

Areti holds an MSc in Engineering Project Management from the Hellenic Open University, a Civil Engineering diploma from the National Technical University of Athens, and Professional Certification in Railway Engineering from TU Delft. Her technical leadership ensures Systema delivers infrastructure projects that meet the highest international standards while addressing complex engineering challenges through innovative solutions.

David Kelly
Director of Procurement Support Services & Head of Water Sector

David Kelly leads Systema’s procurement and water sector operations with over 30 years of international experience in infrastructure development. His expertise combines high-level procurement strategy with extensive knowledge in water infrastructure projects and contract management across multiple regions.

As Procurement Support Services Director and Water Sector Head, he oversees major infrastructure programs including €100M+ water and wastewater initiatives for international financial institutions. His expertise spans procurement strategy development, FIDIC contract administration, and implementation of complex environmental infrastructure projects. He brings particular strength in technical assistance to public sector clients and sustainable infrastructure solutions.

David is a Chartered Civil Engineer, Member of the Institution of Civil Engineers, and holds a BEng (Hons) in Civil Engineering from Sheffield Hallam University. His leadership ensures Systema delivers excellence in procurement services and water sector projects while maintaining the highest standards of professional practice.