I
saac Stewart (42) is Co-Founder and Partner of Gravitas. Isaac is a seasoned public affairs strategist with more than 20 years of experience across Australia and Singapore.
Prior to co-founding Gravitas in September 2025, Isaac worked at Purple (formerly Cannings Purple) from 2021 to 2025, holding multiple roles including Director, Associate Director and Practice Lead.
Prior to 2021, Isaac served as a political advisor to the Commonwealth Government, including to the Minister for Environment & Heritage (2005-2007), and more recently, the Chief Government Whip (2019-2021).
From 2010 to 2019, Isaac held positions as District Manager and Regional Manager at WA Football. Before that, Isaac worked as a senior journalist with Asian Banking & Finance, Asian Power, Investment Asia and Singapore Business Review (2007-2009)
Isaac holds a Bachelor of Arts in Communications & Media from Notre Dame University, a Master of Business Administration (MBA) from Deakin University and a Certificate in Mergers & Acquisitions from INSEAD.