Negotiated invitation to tender, deadline 28/06/2023, for technical service inspections (laboratory identification tests, inspection of deep foundations, core drilling, installation of piezometers, penetrometer tests, dilatometer or pressure meter) - carried out on behalf of the contracting authority - as part of the construction of lines 15 West and 15 East (including the Rosny operating center) of the Grand Paris Express. For further information please click here where offers must be sent. Contract duration will be 48 months. Contact Societe du Grand Paris, Saint-Denis, tel +33 182462000, fax +33 182462031, email Marches-sgp@societedugrandparis.fr. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=330160-2023. Ref. n. 2022PN022. 22/23.