| 1995 – 1999 | Architectural studies at Fachhochschule Koblenz, graduated Diplom-Ingenieurin |
| 1999 – 06/2008 | Working experience with Architekturbüros Ellenberger/Frankfurt, Hahnenfeld Architekten/ Frankfurt, Ingenieurbüro Hartl/Freising |
| 07/2008 – 03/2014 | Willen Associates Architekten, project management |
| 04/2014 | Founding of Achtergarde + Welzel Architektur + Interior Design |
Silke Achtergarde
Dipl.-Ing. (FH) Architektin AKH
Christian Welzel
Dipl.-Ing. (FH) für Innenarchitektur
| 1987 – 1991 | Interior design studies at Fachhochschule Wiesbaden, graduated Diplom-Ingenieur |
| 1989 – 1990 | Working experience with HPP Architekten/Hentrich Pettschnigg Partner |
| 1991 – 06/2008 | Working experience with Bunk, Hartung & Partner/ Bad Homburg, DAL-Bautec/Mainz, Deutsche Bautec Baumanagement GmbH/ Mainz |
| 07/2008 – 03/2014 | Willen Associates Architekten, office manager |
| 4/2014 | Founding of Achtergarde + Welzel Architektur + Interior Design |