| Pascaline | Achard | Rigot & Rieben SA | | 1219 | Le Lignon | GE |  |
| Peter | Ackermann | Atelier A Peter Ackermann GmbH | | 8908 | Hedingen | ZH | |
| Roger | Ackermann | Energieberatung | | 8887 | Mels | SG | |
| Peter | Adam | Dipl. Architekt ETH/SIA | | 4102 | Binningen | BL | |
| Marco | Adamo | IWB Energieberatung | | 4051 | Basel | BS | |
| Vincent | Adamo | Optimisez.ch | | 1723 | Marly | FR | |
| Heinz | Aeberhard | Energieberatung Aeberhard | | 8595 | Altnau | TG | |
| Dieter | Aeberhard Devaux | dadarchitekten ETH HTL SIA | | 3014 | Bern | BE | |
| Ruben | Aebersold | MBJ Bauphysik + Akustik AG | | 3422 | Kirchberg | BE | |
| Michel | Aebi | RCS SA | | 6612 | Ascona | TI | |