Open to opportunities

Juan Diego Sierra

@juandiegosierra1

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I grow B2B accounts through customer success, retention, and high-touch client relationship management.

Colombia

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What I'm looking for

I'm looking to grow B2B customer relationships, improve client experience, prevent churn, and drive account expansion through cross-functional collaboration.

I've grown B2B account portfolios at Modloft, helping scale team revenue from $250K to $1M through relationship management and proactive account expansion.

Across Modloft and Cressina, I manage the end-to-end customer lifecycle for high-value clients—from onboarding and product adoption to renewals, upselling, and complex escalations. I partner with sales, operations, and logistics to remove delivery friction, improve account health, and protect long-term retention.

My background also includes online sales operations, e-commerce marketplaces, admissions, and customer service. I bring bilingual English and Spanish communication, CRM-driven customer insights, and a customer-centric approach to turning operational challenges into lasting relationships.

Experience

Work history, roles, and key accomplishments

Senior Customer Success Specialist

Cressina

Feb 2026 - May 2026 (3 months)

Owned the end-to-end B2B customer lifecycle for high-value clients, driving onboarding, product adoption, and retention. Partnered with cross-functional teams to eliminate delivery friction and formulated account strategies to unlock expansion and upselling.

Customer Success Management CRM Relationship Management Churn Prevention Cross functional Leadership

Education

Degrees, certifications, and relevant coursework

EAFIT University

Bachelor of Arts, International Business

2005 - 2010

Pursued a Bachelor's degree in International Business with a major in International Commerce, gaining a strong foundation in global trade and business practices.