Callum Lockwood, Director of Organic Search at Re:signal

Callum Lockwood is Director of Organic Search at Re:signal, with over 15 years of experience in Organic Search and eCommerce.

He’s most interested in how eCommerce brands build the foundations that drive organic revenue and how AI Search is raising the stakes on getting that right.

Currently focused on how AI search is reshaping eCommerce discovery and purchasing behaviour, Callum brings a practical, commercial perspective to one of the most significant shifts the industry has seen.

📢 Callum’s Joint Talk – The eCommerce Search Playbook for AI Enhanced Shopping 

Sam Zindel, CEO at Propellernet

Sam Zindel is CEO of Propellernet digital marketing. With 20 years of industry experience, he has helped brands including Apple, Red Bull, Gymshark and Waitrose and leads the business by combining purpose with performance.

A certified B Corp, Propellernet has been ranked in the top 20 places to work in the UK for 12 years in a row. In 2025 Propellernet was awarded Best Integrated and Best Search Agency at the UK Search Awards and has been recognised for taking radical action to restore nature – including planting over a million trees in three years.

📢 Sam’s Joint Talk – TBC

*Further biogs to be added