Lucille Ossai is an international award-winning communications trainer, advisor, keynote speaker, and bestselling author of Influence and Thrive.

She’s also the founder of Rethinking Business Communications Limited. This company delivers training and advisory services on nonverbal and interpersonal communication, public speaking,  business writing, and leadership communication and influence.

Lucille’s expertise is globally recognised. In 2026, Global Gurus ranked her the #10 communication professional in the world. She was the only Black expert to feature in the highly competitive communication category.

For over a decade, Lucille has designed and delivered executive communication programmes at the Financial Times-ranked Lagos Business School, where her sessions have earned ratings of up to 4.9/5. She has delivered communication programmes over 1,000 professionals and leaders, and has partnered with organisations such as Nestlé Nigeria, the Nigeria Stock Exchange, World Commerce & Contracting, and the Society of Petroleum Engineers (Lagos Chapter).

She is also the innovator behind the Global 4-Domain Communication Skills Rating Tool™ — the world’s first culturally intelligent communication assessment spanning four critical domains. Many of the ideas behind the assessment were first explored through her writing and practical work with professionals and organisations.

Her multi-award-winning blog, Rethinking Business Communications Blog, is the only African-based website to appear on Feedspot’s authoritative list of the top 40 communication blogs. Her technical note has been published by The Case Centre (UK), and her articles have been featured in BizCatalyst 360, Enterprising Africa Magazine, and BusinessDay Nigeria.

Her work has earned recognition from senior global leaders. In 2023, Sally Guyer, Global CEO of World Commerce & Contracting, described Lucille’s keynote for the organisation as ‘impactful and inspiring’, noting that the audience greatly valued her practical strategies for improving business communication.

Through her writing, executive education, speaking, and assessment innovation, Lucille helps professionals, leaders, and organisations strengthen communication, build influence, and achieve better business outcomes.