2720 20160701171709.0 10.1017/S1743921314006322 DOI ASTROimport-877 Blomme, R. 2015 The Gaia-ESO Survey and Massive Stars As part of the Gaia-ESO Survey (GES), a number of clusters will be observed that were chosen specifically for their massive-star content. We report on the procedures we followed to determine the stellar parameters from the massive-star spectra of this survey. We intercompare the results from the different techniques used by the nodes of our group to determine these parameters and discuss some of the problems encountered. We present preliminary results for NGC 6705, NGC 3293, and Trumpler 14. We study microturbulence in A-type stars, we use the repeat observation to investigate binarity, and we determine cluster membership from the radial velocity information. The large number of massive-star spectra obtained by the Gaia-ESO Survey will allow us to critically test stellar evolution modelling. Frémat, Y. Gosset, E. Herrero, A. Lobel, A. Maíz Apellániz, J. Morel, T. Negueruela, I. Semaan, T. Simón-Díaz, S. Volpi, D. New Windows on Massive Stars 307 2015 88-89 http://esoads.eso.org/abs/2015IAUS..307...88B published in NONREF