Our Team

The seed sowers

Teachers and assistants who wholeheartedly walk with every child as they grow — with knowledge, patience, and care.

Founder & Director

Yuliner Dejoice Yestiyani

Founder of Yayasan Yestiyani Sesawi Sumba, Sumba Playschool, and Joy Learning Center. Fulbright scholarship awardee in the United States and author of the book “Sesawi”.

Fulbright Indonesia Scholarship Awardee — USA, 2023
Community College Initiative Program (CCI), Arizona — 2023/2024
Maricopa Global Leadership Experience — Arizona, 2023
Youth Leadership School, Leadership Institute — Seattle, 2024
CCI Program Brand Ambassador — 2024
Early Childhood Educator, graduated with honours — 2024
Certified Montessori Educator — 2026
Facilitator, TANGGUH Project (ECE & JHS) — 2026

Teachers & Assistants

Our teaching team

Vivi Gloria Johan, S.Si

Teacher & Mentor

Has taught Baby Class and Kindergarten at Sumba Playschool for nearly two years with play-based, STEAM-integrated learning. Previously a full-English educator at SSA for two years, and a mentor for ECE teachers in EGK's Tangguh Program, supported by the Government of Ireland.

Lidia Purnamasari Nanga, S.Pd

Early Childhood Teacher

A Non-Formal Education graduate specialising in Early Childhood Education. Former teaching assistant at Alam Manusak Preschool, now teaching at Sumba Playschool with creative, safe, and inclusive learning.

Naysila Alicenorin Y. P. Bili

Teaching Assistant

Volunteer and teaching assistant at Sumba Bermain for two years, English Goes to Kampung volunteer, and facilitator at Forum GenRe West Sumba. An experienced MC with a passion for early childhood education.

Yenita Ngongo

Teaching Assistant

Volunteer and teaching assistant at Sumba Bermain, active in English Gathering programs with Sumba Cendekia and Sumba Bermain. Committed to a safe, meaningful learning environment for every child.

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