"They are getting more optimistic for the second half of the year than they have for the first half and actually 2019," Kaeser said in an interview on the sidelines of the World Economic Forum annual meeting in Davos.
Kaeser made the comments after Trump singled out Japanese automaker Toyota Motor Corp and threatened to slap punitive tariffs on its Mexico-built cars.
Profit from Siemens' industrial businesses in the quarter to end-March was 1.7 billion euros (USD 1.9 billion) after 98 million euros in restructuring costs for job cuts. That was below a Reuters poll average of 1.78 billion euros.
Joe Kaeser, Global CEO, Siemens, said that 2015 will be a year of operational consolidation for the company.
Nokia Siemens Networks, the world's No 2 mobile network equipment maker facing tough competition from China, needs to beef up its management team, the finance chief of Siemens said in an interview with German newspaper Handelsblatt.