FTI's UK public affairs practice was set up in 2014 by Alex Deane, who joined from Weber Shandwick and continues to lead the team. Major clients include insurer Aon, British American Tobacco and Mastercard.
It recently lost senior director Liam O'Keefe to MSLGroup, while director Alex Holroyd left at the end of last year to successfully campaign as a candidate for the French parliament for Emmanuel Macron's En Marche party.
The new hires include two senior directors – Gemma Doyle and Tom Burton.
Doyle, who joins next month, was the Labour MP for West Dunbartonshire between 2010 and 2015 and served as shadow defence minister. She has been working for consultancies, latterly Interel, since losing her seat to the SNP in 2015.
Burton joins in October. He is currently head of government relations at Barclaycard and chair of the British Banking Association's Digital Policy Committee. He has been at Barclaycard for seven years, and prior to this worked for Citigate Dewe Rogerson.
Mike Archer joins this month as a director. He is currently a senior adviser at the Department for Exiting the European Union, having previously worked in several other government departments and before that the European Parliament.
The firm will also welcome senior consultant Rebecca Gladstone from the Association of British Insurers next month. Josh Cameron, previously a special adviser to the New Zealand Prime Minister Jon Key and also at the Department for Culture, Media & Sport, joined the firm in April.
Deane said: "These new hires are collectively a great vote of confidence in what we have built so far and seek to put us at the forefront of the market when it comes to insight on key political issues such as Free Trade Agreements and the Brexit process. We have also sought to bolster our expertise in key sectors for the business such as financial services and defence, which we wish to grow and expand in the coming years."