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Sophia Heejeong Seo
Director-level Programmatic Media Strategist specializing in global omnichannel campaigns
Los Angeles, CAAssociate Director, Programmatic | Amazon6 years experienceDirectorAdvertising & MarketingMedia & EntertainmentTechnology
ScreenedIdentity Verified
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About
Programmatic media specialist with deep hands-on experience running high-budget AWS/Amazon campaigns, including a $4MM side-by-side DSP bakeoff (DV360, The Trade Desk, Amazon DSP) focused on awareness and cost efficiency. Strong in CTV/OLV optimization and measurement, leveraging brand lift and attention studies, and known for disciplined testing frameworks and practical troubleshooting to restore performance.
Experience
Associate Director, Programmatic | AmazonKINESSO
Manager, Programmatic | AmazonOMD USA
Associate Manager, International Media Planning | AppleOMD USA
Senior Associate, International Media Planning | AppleOMD USA
Associate, International Media Planning | AppleOMD USA
Education
University of California, Los Angelesbachelor, Anthropology (2019)
Key Strengths
- Owned and executed a $4MM AWS programmatic campaign with rigorous 3-DSP side-by-side testing (DV360 vs TTD vs Amazon DSP)
- Designed controlled test frameworks with clear hypotheses, guardrails, and control/test line items (budgets, pacing, frequency, flighting)
- Strong video/CTV performance optimization (88% overall VCR; 98% VCR on CTV) at efficient CPM ($11.50)
- Measurement-driven planning using brand lift studies and attention metrics (Dynata, Attest, Adelaide)
- Platform nuance and troubleshooting expertise (creative rejections, PMP availability, match rates, targeting limitations) with documented client-facing caveats
- Performance recovery playbook: diagnosed low CTR via DSP/DCM reporting, publisher troubleshooting, blocklists, frequency/pacing changes, and budget shifts (0.03% to 0.08% CTR)
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