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Sebastian Gruellich is an experienced tunneling professional with a career spanning from 2002 to present. Currently serving as TBM Construction Manager SCS for S2 East Tunnels at STRABAG, responsibilities include overseeing the SeC Trunk Sewer Project in York Region, which involves the construction of 15km of sewer tunnels using four EPBs. Previous roles at STRABAG included Tender Manager for various international tunneling projects and the CrossRail Project C435. Prior to joining STRABAG, experiences included positions as Station Manager and Tunnel Manager at Metro Tunneling Group for the Delhi Metro project, and as Tender Manager and Tunnel Section Manager at Dywidag International GmbH. Early career experience also includes work as a Tunnel Engineer at Walter Bau AG. Sebastian Gruellich holds a degree in Civil Engineering from HTWK Leipzig.