In his new role Downing will be responsible for promoting the range of acuson diagnostic ultrasound systems and supporting the needs of customers across the regional areas of East Midlands, Yorkshire and the North East.
Siemens said that Mr Downing joins from a multi-modality account management role at GE Healthcare and also brings to Siemens a background in ultrasound sales from Esaote.
Mr Downing said: "Ultrasound offers exciting diagnostic opportunities in today's healthcare environment and I'm delighted to join the Siemens team at a time of great innovation.
"Handheld ultrasound such as the Acuson P10 offers the potential as a digital stethoscope on the wards plus an off-site triage tool, and the next generation Acuson S2000 will greatly enhance clinical workflow and diagnostic confidence. I am looking forward to championing the functionality and benefits of the range of solutions in the North East region."
Declan Dunphy, product manager for Ultrasound at Siemens Healthcare said: "Peter will be a great addition to the team having worked within the NHS and in industry. We look forward to his contribution in supporting the requirements of Trusts as they look for greater productivity returns from diagnostic ultrasound."