McIntosh has spent more than 30 years in British politics, as both an MP and MEP. She served as chair of the Environment, Food and Rural Affairs select committee from 2010 to 2015.
She was on the Conservative front bench for nine years from 2001 and was a shadow minister for a number of government departments including Transport, Work and Pensions, Foreign and Commonwealth Office, Environment, Food and Rural Affairs and Culture, Media and Sport.
At Hume Brophy, McIntosh is to work alongside Olle Schmidt, Gary Titley and George Lyon in the agency's UK public affairs team, advising clients across the financial services, TMT, healthcare, agri-business, energy and environment, and aerospace and transport sectors.
Hume Brophy specialises in PR, investor relations, public affairs and corporate and financial comms, with operations in Brussels, Dublin, London, Paris and Singapore.
Robert Condon, managing director, UK public affairs at Hume Brophy, said: "Anne joins at an exciting period of growth for us. She was on the front line of Westminster politics for 15 years. Her wide experience means her advice is insightful, strategic and always grounded in practical experience. Anne is extremely effective and hands-on. She, like us, is focused on delivering impactful campaigns for clients. "
McIntosh said: "Hume Brophy is an industry leader in devising and implementing successful public affairs and communication strategies. I’ve always been impressed by its team and found them hardworking, informed, strategic and fun to work with. It has a great and diverse client roster and I look forward to contributing positively to the growing firm and our clients."