Lea Nielsen Sebastian in

Lea Nielsen Sebastian

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Founder at Arc | The Second Curve of Leadership
📍 Cascais, Lisbon, Portugal

Lea Nielsen Sebastian is a go-to-market leader and the Founder of Arc, an accelerator for experienced professional women. With over 15 years at Google, Salesforce, and Wellhub, she specializes in scaling venture-backed companies by designing their commercial operating systems. People describe her as bright, charismatic, talented, and proactive.

She is passionate about redefining leadership and work for ambitious women, helping them transition into flexible, high-impact portfolio careers. A certified Integrative Nutrition Health Coach, she has a clear interest in health and wellness, which complements her focus on creating sustainable career paths.

She founded her company, Arc, to directly combat the statistic that 50% of women in tech leave the industry by age 35.

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Experience
12 Years
Current Role
Founder
Job Level
Leadership
Location
Cascais, Lisbon, Portugal
Personality Overview

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Communication Style
Decision Approach
Work Preference

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Priorities

Topics Lea cares about

Women in Leadership
Founded Arc, a community and accelerator, to help ambitious women build independent, high-impact portfolio careers and counter the mid-career corporate exodus.
Go-to-Market Strategy
Specializes in building commercial operating systems for Series B-C companies, drawing on 15+ years of experience scaling new markets at Google and Salesforce.
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Career

Work history

9-2025
Founder
Arc | The Second Curve of Leadership
7-2023
Fractional CCO / CGO | GTM & AI Growth Operator
Independent / Various Clients
1-2021 - 7-2023
Senior Client Partner
Salesforce
1-2018 - 1-2019
Managing Partner - Launch, Customer Success, Service and Marketing
Wellhub
7-2017 - 1-2018
Managing Partner - Launch & Customer Success
Wellhub
In the press

Media appearances

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Education
Bachelor of Science (BSc)
University of Bath
Social presence
in
Behavioral profile

DISC profile (public)

DISC behavioral profile

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