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![Mohammad Tabarra, Arup](/globalassets/images/profiles/m/mohammad-tabarra.jpg?width=460&height=383&rxy=0.58%2c0.37&quality=100)
Mohammad Tabarra
Global Tunnel Ventilation Leader
I lead Arup's tunnel ventilation team, advising clients contractors and operators on industrial tunnel ventilation and metro projects, as well as solar energy projects.
![Mark Wallace, mining leader for East Asia.](/globalassets/images/profiles/m/mark-wallace.jpg?width=460&height=383&quality=100)
Mark Wallace
East Asia Tunnel Design and Ventilation Leader
Mark is a director at Arup with over 30 years experience in project management, site formation, ground and project risks, underground space, geotechnical design, engineering geology and tunnelling related work.
![Neil Martini, Arup](/globalassets/images/profiles/n/neil-martini.jpg?width=460&height=383&quality=100)
Neil Martini
Europe Tunnel Design and Ventilation Leader
Neil Martini is an Associate and Chartered Civil Engineer working with Arup’s Infrastructure team in Copenhagen.
![Matt Sykes, Arup](/globalassets/images/profiles/m/matt-sykes.jpg?width=460&height=383&rxy=0.45%2c0.32&quality=100)
Matt Sykes
UKIMEA Tunnel Design and Ventilation Leader
Matt leads Arup’s civil structural, bridges and tunnelling team in our London office – a group of enthusiastic engineers who challenge themselves to constantly improve solutions.