header-shadow

Uffici

Paesi Bassi

Leon Borst

Partner

Monnikevenne 62 1141 RL Monnickendam
+31 6 26 16 06 38
lb@challengelearning.com

Francia

Marie Antoinette Orsini

Partner

797 Rue de la Faucille, 01173 Gex
+33 4 50 42 32 43
mao@challengelearning.com

Germania

Markus Gebhardt

Partner

Birkenweg 1 92253 Schnaittenbach
+49 96 22 71 86 40
mg@challengelearning.com

Svizzera

Beate Vetter

Partner


Ch. Lugny les Charolles 11, 1031 Mex
+41 79 322 58 35
beate.vetter@challengelearning.com

USA

Bill Daniels

Partner


6386 Warriors run, Littleton, CO 80125
+1 303 932 8565
bd@challengelearning.com

Italia

Guido Paolo Ridoni &
Dan Wiesenfeld

Partners

Via Pateras 21, 00153 Roma
+39 33 85 07 34 39
+39 33 58 25 50 18
gr@challengelearning.com; dw@challengelearning.com

Australia

Simon Coles

Partner

70 Central Road Avalon Beach NSW 2107, 2107 Sydney
+61 452 406 319
sc@challengelearning.com

Tailandia

Matthias Abold

Partner

Chumphon / Thailand
+66 84-872-5280
am@challengelearning.com