Stephen Knowles

Serial entrepreneur and agency builder: Knowles founded and led multiple specialist businesses—most notably Downstream (performance marketing) and Accordant (data‑driven customer experience)—and has repeatedly built teams and capabilities that attracted acquisition and integration into larger networks. com+2

Adobe and personalization specialist: Accordant under Knowles was positioned as an Adobe Experience Cloud specialist (including Adobe Target/Media Optimization specializations), driving personalization, data management and programmatic capability for clients. co+1

Experienced leader inside networks and indies: after leading a business that was acquired into the Dentsu group, Knowles held senior growth leadership within Dentsu (and related Isobar/Merkle alignments) before departing to co‑found REUNION, demonstrating experience running both specialist firms and operating inside global networks. com+2

Publicly noted property ownership in Sydney: reporting links Knowles and his wife to high‑value residential property in Sydney's eastern suburbs (Vaucluse), as covered in multiple property publications. afr+1