She joined on Monday (3 February) from The Wren Press, where she was chief executive.
Pittaway will oversee the seven London Livery Halls in the Chester Boyd portfolio, and will report to CH&Co joint chief executive Alison Tyler.
She brings with her a colourful and varied career history. Before joining The Wren Press, Pittaway was a senior manager at Ernst & Young. She was previously chief of staff for Baroness Emma Nicholson of Winterbourne, and assistant private secretary to HRH The Duke and Duchess of Gloucester.
Before this she spent nine years in the British Army, and served with the Royal Corps of Signals in Germany, Cyprus and Afghanistan.
Pittaway said: "I’m looking forward to joining Chester Boyd and becoming part of the Livery Hall traditions and history, as well as developing the commercial activities."
Tyler added: "It has been a tough few years in the city during the recession, but we have never compromised our commitment to the highest standards of food and service.
"As the market improves, driving sales is of critical importance to our Livery clients and we believe this investment in Sarah will further strengthen relationships with both the Livery and our commercial customer base."
Comment below to let us know what you think.
For more in-depth and print-only features, showcases and interviews with world-leading brands, don't miss the next issue of Event magazine .