Leadership Team

Zia Hayat - Head shot
CEO & Founder
Zia Hayat

Designed and delivered critical military and financial information systems with Accenture, BAE Systems and Lloyds.

Ian Welch - Head shot
Ian Welch

15 years of managing marketing and operations for major online companies, such as ladbrokes.com.

Sarah Whipp - Head shot
CMO & Head of GTM Strategy
Sarah Whipp

30 years of general business and global marketing leadership for companies such as Fujitsu, McAfee, Symantec, and Standard and Poors.

Patrick Imbach - Head shot
Patrick Imbach

14 years of audit and financial reporting experience at KPMG and founder of KPMG’s startup advisory practice in the UK.

Yogesh Patel - Head shot
Yogesh Patel

Has held thought leadership roles in organisations such as Lloyds Banking Group, HSBC Plc and NICE Actimize.

Amir Nooriala - Head shot
Amir Nooriala

Amir joined Callsign as Chief Commercial Officer from OakNorth. Before joining OakNorth he held positions at Barclays, Accenture and Cisco Systems.

Our Investors

  • Investor logo PTB
  • Investor logo Accel
  • Investor logo Westwave