“Squared² Collective — a hybrid consulting platform built on strategic thinking and PRACTICAL TRANSFORMATION”
Sibel Ülkü Yarangümelioğlu (with 20 years experience)
Former Co-President, Wavemaker
Former Lead, WPP Open Door for Amazon
Former Board Member IAB Turkey 2024 - 2025
Past Client Portfolio Includes: Amazon, Trendyol, L’Oréal, Nestlé, IKEA
Cannes Lions 2025 Media Jury Member
sibel.ulku@s2qcollective.com
Selin Şahin Coşkun (with 25 years experience)
Former Co-President, Wavemaker
Former Media Director, RB Middle East
Past Client Portfolio Includes: P&G, Nestlé, SC Johnson, Huawei, Özdilek, Danone, Trendyol, Netflix, Yapı Kredi, HSBC.
Background in media investment & trading
selin.sahin@s2qcollective.com
With global brand and agency experience across diverse markets, we bring international perspective grounded in local insight — from Istanbul to Florida.
01
Founder-Led Strategy
Run by hands-on experts in media, brand, and agency leadership.
02
Independent & Objective
No affiliations — just unbiased, brand-first advice.
03
Modular & Scalable
Flexible support, from quick consults to full transformations.
04
Built for Complexity
We thrive in complex ecosystems — helping modern brands unlock clarity, focus, and growth where complexity meets opportunity.
05
Global Thinking, Local Understanding
Built in Istanbul and Florida, with global expertise and local insight.
We bring the thinking, you bring the challenge.