Airbus Hamburg; Bäko; Banken und Sparkassen; Barmer Ersatz-kasse; BayerischeVersicherungskammer; Einzelhandelsverbände; CDU/CSU-Bundestagsfraktion; Programmparteitag der Hessischen Grünen; Geberit; Lions Clubs; Markant; SAP; Schwarz-Pharma AG; Siemens Haustechnik;Thyssen Krupp;VDI-Jahrestagung Chemie-ingenieure;Verband der Krankenhausdirektoren Deutschlands; ZF Friedrichshafen Führungskräfte Media contributions:
ZDF, n-tv, BloombergTV, Deutschland Radio, BR,WDR, RBB, HR
“The book emits unshakeable optimism.”
RheinischerMerkur
“It would be desirable to have HändelerÂ’s enlightening book find a wide audience”
DagmarDeckstein, SüddeutscheZeitung
“Händeler’s book is a course book of how to discover the quality of interpersonal relations as the most important source of added value.”
NorbertCopray,PublikForum
“You received an average score of 1.24 upon analysis of our feedback questionnaire, so you have become our frontrunner! Congratulations on a very successful appearance.”
SAP Personnel Congress with 1,500 participants
- Evaluated with a score of 1.4 at three Bitkom Knowtech Congresses in 2009, 2010 and 2011
- Best-rated lecture at the Schmidt-CollegDays
- Standing ovations at the 13th Stuttgart Knowledge Forum