Aaron Jacobson, Head of B2B Growth Marketing at SpaceXSI B2B Growth Marketing

Aaron Jacobson

Head of B2B Growth Marketing at SpaceXSI

Formerly X. I lead lifecycle, paid media, the web, and measurement.

$15M
Quarterly paid marketing budget, including in-house ads
100%+
Actives and revenue since 2024
90%+
Lower CPA on multiple platforms
2x
Leads in 2H 2026

What I do

SpaceXSI formed when X merged with xAI and was acquired by SpaceX. It runs a flat org, so I work closely with ads engineering, data, product, sales, finance, and design. Scope, results, and how I use AI →

Experience

Education

Read the full bio →

Writing

All writing →

Skills

Lifecycle & marketing ops

Eloqua, Iterable, marketing and transactional email, lead management, forms, segmentation

Web, content & localization

2,000+ page global B2B site, AEM to Sanity migration, global messaging and creative, localization in 10+ languages

Paid media & platforms

Google, Meta, LinkedIn, Reddit, Microsoft, Taboola, Shopify; SEM, video, programmatic, outbound

Measurement & experimentation

GA and GTM, pixels, Conversions API, attribution models, A/B testing, SQL, BigQuery, ML personalization, exec dashboards

Get in touch

Email is the best way to reach me.

Resume available on request.