William Whitlock is currently the Head of Retention at Serotonin, where they focus on helping 7-8 figure eCommerce brands maximize ROI through Email and SMS marketing. Previously, they served as Client Services Lead at Unparalleled until its acquisition by Serotonin in August 2025, and they held copywriting positions at Riot E-Liquid and Echo Creative Marketing. William also worked as a model during this time. They co-owned and led the retention department for 6-8 figure eCommerce brands before merging with Unparalleled in March 2024.
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