Warson will report to Charrington - who took the helm from Mark Mason - and be based in New York. She will be a member of the private bank’s global leadership team. She has nearly 30 years of experience working with ultra high net worth individuals, families and institutions.

She was most recently Western region market manager for Citi Private Bank in North America. In this role she oversaw ultra high net worth banking offices in Beverly Hills, Los Angeles, Orange County, Palo Alto, San Francisco, Phoenix and Seattle.

Before joining Citi in 2010, Warson was Western division executive at US Trust, Bank of America Private Wealth Management. Prior to joining US Trust, she was executive vice president and regional managing director of private client services at Wells Fargo Private Bank.

Citi Private Bank has $310 billion in global assets under management with 50 offices in 15 countries, serving clients across 139 countries.

Click here to see an interview with Charrington in September 2013 about the firm's UHNW focus.