Welcome to ISA PLAN THOUGHT. PLANNED. SOLVED. Here emerges a new website. Please be patient a little longer. We look forward to welcoming you in the new look soon. ISA PLAN INGENIEUR GMBH Brueckenstrasse 4 51379 Leverkusen Phone: +49 2171 36 355 0 Fax: +49 2171 36 355 19 Email: info (at) isaplan.net Managing directors authorized to represent: Dr.-Ing. Peter Sienko and Dipl.-Ing. Jürgen Kracht Register court: Leverkusen District Court Register number: HRB 3231 Sales tax identification number: 230/5748/0574 Supervisory authority: Cologne Chamber of Commerce and Industry Responsible for the content: Dr.-Ing. Peter Sienko and Dipl.-Ing. Jürgen Kracht