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The Team

A resident Riyadh team, backed by the Group’s department heads in Madrid.

Leadership, technical bench and international network as presented in the 2026 company profile.

Leadership · GIS-KSA

Who leads the work

Samer Ayyash, MBA

Samer Ayyash, MBA

General Manager

23+ years across development and engineering, spanning project management, infrastructure and building design from concept to completion. Named among the best 40 engineers under 40 by Consulting-Specifying Engineer in 2017.

Raed Darabseh

Raed Darabseh

Head of Operations

21+ years in the design and project management of complex architectural projects, leading multidisciplinary teams across healthcare, residential and engineering developments, and coordinating consultants and sub-consultants to programme.

Mohammad Al Mofleh, PhD

Mohammad Al Mofleh, PhD

International Director — MENA

25+ years in urban development and environmental engineering infrastructure, with deep expertise in integrated water cycle management. Established four GIS subsidiaries and branches across the Middle East and North Africa.

Alberto Sanjurjo Álvarez, PhD

Alberto Sanjurjo Álvarez, PhD

Lead Architect

30+ years across educational, residential and commercial projects worldwide. Specialist in building technology from the Universidad Politécnica de Madrid; lecturer, PhD and published researcher.

Nisreen Bader

Nisreen Bader

Business Development Manager

12+ years in engineering consultancy. Identifies and secures new opportunities, leads strategic growth initiatives and builds the long-term client relationships that underpin the Riyadh office.

Technical Bench

The engineers behind the drawings

Salah Al Kurdi

Salah Al Kurdi

Head of Mechanical

Lead mechanical engineer with more than 18 years designing and supervising HVAC, plumbing, fire protection and building performance systems on landmark projects across the region.

Rami Ayyash

Rami Ayyash

Head of Electrical

Lead electrical engineer with more than 17 years in the design and supervision of building electrical systems, managing complex installations across multiple sectors to exacting standards of safety and compliance.

Alberto Belinchón

Alberto Belinchón

Head of Urban Infrastructure

Civil engineering expert with GIS since 2001. Partial development plans, urbanisation projects, road and railway works, urban planning and geotechnical studies across dozens of schemes.

Mohammad Al Aitan

Mohammad Al Aitan

BIM Manager

More than 10 years in Building Information Modeling, streamlining delivery through digital solutions, leading coordination and managing technical deliverables across every discipline.

Hamza Amoush

Hamza Amoush

BIM Architect

Architect engineer with 12 years of international design experience, focused on BIM-driven design and coordination, architectural detailing, 3D modelling and digital workflows.

Omar Al Nair

Omar Al Nair

Project Architect & BIM Coordinator

Retail, housing and residential work in Belgium, Hungary and Saudi Arabia. Revit, ArchiCAD, AutoCAD and Navisworks; projects include the Abha Entertainment Center, NEOM Command Center and KIZAD Food Hub.

Moumen Zaree

Moumen Zaree

Electrical Design & BIM Engineer

BIM models from schematic through to IFC across lighting, fire alarm, security and power. Single-line diagrams and load calculations to SEC, SBC, IBC and NFPA, with renewables and PV experience.

Khaled Al Dasouqi

Khaled Al Dasouqi

Mechanical & BIM Engineer

HVAC, plumbing and firefighting systems, coordinating BIM models in Revit, AutoCAD and Navisworks at LOD 200–500. Work includes the Masjid Al-Haram expansion, SEVEN Entertainment and Lusail Plaza Towers.

Mahmoud Nassar

Mahmoud Nassar

Civil Engineer

Master’s in earthquake and structural engineering, with six years on large-scale construction, fit-out and façade projects across the Middle East including the SEVEN fit-out programme and the Rixos Hotel in Qatar.

María Gallardo

María Gallardo

Senior Interior Design Architect

More than 10 years in retail, housing and heritage refurbishment. Universidad Politécnica de Madrid, with international practice in Germany before joining GIS.

Group Leadership

Madrid and the international network

David Gistau

Founder & CEO, Grupo GIS

Founded GIS in 1996 and led its international expansion from 2011. Technical background in urban planning and infrastructure development; keeps direct, continuous engagement with the technical staff.

Raúl Antón

Technical Director

25+ years designing and supervising large-scale urbanisation - road networks, utility services, public spaces and integrated infrastructure - coordinating dozens of engineers across project phases.

Pedro Rubio

Head of Railway Department

25+ years in railway planning, design, construction and maintenance, including high-speed lines, urban transit and conventional railway, with systems integration and safety expertise.

José Antonio de Alba

Head of Water Utilities

Dams, reservoirs, treatment plants, pumping stations and distribution networks; operation and maintenance management, plus ecological assessment of lakes and water bodies.

Jorge De Haro

General Manager — Romania

With GIS since 2001, from health and safety coordination to Head of Works Supervision in 2003, then Country Manager from 2011 to establish the Romanian branch.

Luisa Fernanda Barreto

General Manager — Colombia

Architect specialising in construction management. Road and railway infrastructure consulting, TransMilenio studies and design, works auditing and public contract coordination.

Mustafa Sagheer

GIS-Iraq Lead

Leads GIS-Iraq from Baghdad.