Sean MacMannis runs Positive Sum, helping founders clarify positioning, test demand, and build marketing systems. His experience includes leading marketing at Nerd Apply and Gitcoin, global product marketing for Pinterest advertising, and product marketing and client solutions at NextRoll.
Sean MacMannis runs Positive Sum, helping founders clarify positioning, test demand, and build marketing systems. His experience includes leading marketing at Nerd Apply and Gitcoin, global product marketing for Pinterest advertising, and product marketing and client solutions at NextRoll.
Career
PSMarketing & Product Marketing Leader at Positive Sum from 2022-09 to Present
NAFounding Head of Marketing, VP Marketing at Nerd Apply from 2025-09 to 2026-03
Head of Marketing at Gitcoin from 2021-08 to 2022-09
Global Product Marketing Lead, Ads Targeting & Quality at Pinterest from 2017-02 to 2020-01
Sr. Director, Product Marketing & Global Client Solutions at NextRoll from 2012-11 to 2015-05YAds Strategy and Integration Manager at Yahoo from 2010-01 to 2012-04
ASenior Account Manager at Adify from 2007-06 to 2010-01