OpenMind will be led by Jen Drexler (pictured), managing partner, who was previously an executive vice-president of insights and strategy for Now What. Before that she was a senior vice-president at Insight Strategy Group, and the co-founder of Just Ask a Woman.

Drexler has worked for brands such as Westin Hotels, Pfizer, Johnson & Johnson, IKEA, Bloomingdale's, Mondelez and Viacom. 

"In our post-truth era, brands must be honest with themselves, and brave enough to challenge their own status quo," said Drexler.

"I always admired Hall & Partners’ global reach, deep client relationships and cutting-edge approaches for translating human truths for the world’s biggest brands. I look forward to working with clients to co-create and craft their blueprints for the future."