About Us
We are an educational design firm with decades of collective experience crafting impactful learning experiences using the principles of global citizenship education. Our passion lies in understanding the science of adult learning and the art of effective online teaching to empower and equip learners, students, parishioners, followers, employees, and trainees to become confident and capable leaders. We believe that truly transformative learning goes beyond simply delivering information. It requires a deep understanding of how adults learn, how to design engaging online ecosystems, and how to cultivate the skills necessary for individuals to speak up in the public square, deliver a compelling message behind the pulpit, and step into important leadership roles at work.
Tumbuh (‘tomb-boo“) is an Indonesian word meaning “to spring forth or to emerge.” We chose this name for our firm at the prompting of international colleagues who believed that this word most accurately described our work in the world.
Our Memberships
We are proud to be members in good standing with a variety of educational organizations and associations that help us advance our mission in the world.
We are committed to advancing our mission through active engagement with leading educational organizations. Our memberships in the Association of Educational Communications & Technology, the Association for Supervision and Curriculum Development, the Association of Leaders in Lifelong Learning for Ministry, The Learning Guild, the Religious Education Association, and the International Society for Technology in Education enable us to contribute to and leverage research, best practices, and collaborative networks, ultimately enhancing our ability to design and deliver transformative learning experiences for our partners.
Meet the Team
Co-founder, Managing Director, Senior Instructional
Designer & E-Learning Developer
Email: lindsay@tumbuhglobal.org
Portfolio: Click here!
Rev. Dr. Lindsay Andreolli-Comstock
Lindsay Andreolli-Comstock (she, her, hers) is co-founder and managing director of Tumbuh Global. She also serves as the president and principal consultant for The School of Global Citizenry, a program of Tumbuh. Lindsay is a senior instructional designer, e-learning developer, LXD consultant, ordained clergyperson, international immersion guide, small business owner, and published author with 23 years of nonprofit and B Corp-spirited for-profit experience.
Lindsay is an ordained Alliance of Baptists minister, CEU-certified online instructor, former anti-human trafficking specialist (Southeast Asia), and three-time American expatriate. She has lived in 5 countries (Indonesia, Malaysia, Nepal, Greece, and Albania), traveled to more than 43 countries, spent half of her adult life living abroad, and speaks fluent Bahasa Indonesia and Bahasa Melayu.
Lindsay earned a Master of Divinity (M.Div) from Baptist Theological Seminary at Richmond, Virginia (2007) and a Doctor of the Advanced Practice of Ministry (D.Min) from Louisville Presbyterian Theological Seminary (2015) in Kentucky where she recently served three years on the Alumni Board of Directors. Lindsay's doctoral thesis focused on adult curriculum design and development. She currently serves on the Executive Leadership Team of the Association of Leaders in Lifelong Learning for Ministry (ALLLM) and as Vice President of the Kranky Thumb Collective.
Co-founder, Educational Content Developer &
Multimedia Specialist
Email: mary.andreolli@tumbuhglobal.com
Portfolio: Click here!
Rev. Mary Andreolli, MFA
Mary Andreolli (she, her, hers) is co-founder, educational content developer, and multimedia specialist for Tumbuh Global and The School of Global Citizenry. Mary is a passionate visual storyteller, 3D modeler, AR content creator, videographer, video editor, and motion designer who is deeply committed to connecting our human stories to the world's sacred narrative.
Mary created, produced, and hosted Everyday GraceTV for the North Carolina United Methodist Church (NCUMC) which is available on YouTube and Roku. She has also worked for Epic Games focused on ICVFX Virtual Production workflows in Unreal Engine 5.
Mary earned a Master of Divinity (M.Div) from Wake Forest University in North Carolina, a Master’s certificate from the Center for Cartoon Studies in Vermont, and a Master of Fine Arts (MFA) in Motion Media Design from the Savannah College of Art and Design (SCAD) in Georgia. Her master’s thesis focused on evoking the spiritual in art through forms and patterns found in nature.
Mary is an ordained American Baptist minister, executive communications specialist with 30+ years of nonprofit experience, a CEU-certified online instructor, has traveled to more than 65 countries around the world, and lived abroad for 6 years in five different countries (Indonesia, Malaysia, Nepal, Greece, and Albania).