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Sonia Maciuszewicz

Sonia Maciuszewicz

Fractional Head of Platform, Founder Coach, and VC Ecosystem Builder

sonia-maciuszewicz
London, United Kingdom
Joined January 2026
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Network

5.1K connections
🤖
AI ML Founders
📈
AI Product GTM
🤝
VC Platform Talent
💰
Backed VC Network
💡
Entrepreneurs First
📚
13books Capital
🇮🇹
Italian Founders Fund

Summary

Sonia is a dedicated VC platform leader, specializing in building and enhancing founder support ecosystems. Her roles at 13books Capital, Portfolio Ventures, Italian Founders Fund, and Backed VC demonstrate a consistent focus on creating valuable post-investment experiences for entrepreneurs. forbes+1
With a background in law from UCL and BPP Law School, Sonia possesses a strong analytical foundation that she applies to the entrepreneurial landscape. She believes her legal philosophy studies, particularly in breaking down complex concepts, have been highly beneficial in her VC career. forbes+1
Recognized on Forbes' 30 Under 30 Europe - Finance list in 2020, Sonia has made significant contributions to the startup and venture capital space. She was part of the founding team at Entrepreneur First, where she focused on talent acquisition and developing future entrepreneurs, contributing to a portfolio valued at over $2 billion. forbes+1
Beyond strategy, Sonia is a passionate founder coach, emphasizing leadership, people development, and mental well-being for entrepreneurs. She champions creating environments where founders can thrive, reflecting a holistic approach to supporting high-growth companies. youtube+1

Work

Education

Notes

DSDanielle Silvestrosaid they've seen
SMSonia Maciuszewicz
handle the challenges of rapid team growth (0 to 200+ people) with real skill and leadership.

Jan 23, 2026

ASAlessandra Santisaid they've seen
SMSonia Maciuszewicz
make a real positive impact supporting founders and portfolio companies as a Head of Platform.

Nov 11, 2025