President  Geoff Tamman

Vice-President of Finance and Operations, Shipium

Geoff leads finance and operations for Shipium, a supply chain technology company based in Seattle.  Prior to Shipium, Geoff’s roles were leading technology, finance and accounting teams across Amazon’s Consumer business for 12 years; Assistant Controller for CRISTA Ministries; and auditor for Deloitte & Touche, after receiving his Accounting degree from Seattle Pacific University. Geoff currently lives in Shoreline with his wife, Jennifer, and their two children.

Vice-President  Mille Sondles

Aerospace Engineer, The Boeing Company
Mille is an aerospace engineer who joined Boeing in 1996. Mille currently is the Engineering Unit Member Technical Authority Advisor for Regulatory Administration & Airworthiness. Prior to joining Regulatory Administration & Airworthiness, Mille held various positions in product development, research, and airplane certification. Since 2000, she has been an active volunteer serving the unhomed at various nonprofits including Seattle Union Gospel Mission and Vision House. Mille lives in Edmonds, WA with her husband, Jeff, where they are members of North Sound Church.

Secretary  Katie Jo Giesbers

Executive Director of Forecasting and Analytics, The Walt Disney Company
Katie Jo is the Executive Director of Forecasting & Analytics at The Walt Disney Company across Disney Entertainment and ESPN. She and her team are responsible for strategic planning, forecasting and viewership insights across the expansive portfolio of Disney content on digital platforms. She has 15+ years of experience across media and entertainment, streaming and tech and has a deep passion for leading teams and developing talent. Katie Jo attended the University of Washington and double majored in Communications and International Studies. Katie Jo and her husband, Nolan, are involved in their kids’ sports teams, community and church, Bethany Community Church, where they faithfully led a marriage ministry for 10 years. They live in Lake Forest Park with their three kids, Henry, Charlotte and Bellamy.

Treasurer  John Flemming

Technology Banker, Canadian Imperial Bank of Commerce
John returns to the Vision House board having served from 2014-2016 as board treasurer.  Leaving the board to become the Renton Little League president, he has returned after hearing God's call to continue the pursuit to end homelessness.  John’s day job is as a technology banker with Canadian Imperial Bank of Commerce.  John has been in the technology banking industry since 2000, providing growth debt capital in the greater Seattle tech sector, ranging from early-stage, venture debt financing to companies that have received their first institutional capital to later-stage buyout financing for M&A transactions, and all stages in between.  John has been married for 20 years to his wife Delrene.  John and Delrene have 2 children, Liam and Emma.  Emma is 19 and is a sophomore at Chapman University in Orange, California.  Liam is a 17-year-old senior at O’Dea High School in Seattle.  


Allen Dauterman

Senior Development Director, TWG

Allen is a Senior Development Director for a national affordable housing developer focused on regional development efforts in Washington, Idaho, and Oregon. He brings over 30 years of planning and development experience with a focus on mixed-use and large-format retail projects across North America, with the recent six years focused on affordable housing projects in King County and the Pacific Northwest. As a Newcastle resident, Allen has been very active in his community, having served as a Planning Commissioner, City Council Member and Mayor of Newcastle. He also advocated for affordable housing policies at municipal, county, and state levels. Allen is a Washington State University graduate with a Bachelor of Architecture degree.

Madison Jantz

Human Resources and Hospitality, The Center: A Place of HOPE

Madison works on a team of people who provide whole-person care through professional excellence and sound psychological principles to those who need compassion, healing, and hope. In addition to her work at The Center, Madison is also a Board-Certified Mental Health Coach with the International Board of Christian Care. Madison attended Liberty University, where she received her Bachelor’s in Christian Leadership and Management. In her free time, Madison volunteers for her church, Mountlake Church, and for a mission organization located in a third-world country. For fun, Madison enjoys spending time with her husband, drinking tea with her friends, playing cello, and reading as many books as possible in a year. 

Ninevah Lowery

President of the Board of Trustees, University Prep High School, Seattle, and Consultant, UNCF Pacific Northwest

Ninevah Rudolph Lowery brings extensive experience from a 15-year tenure in the computer software industry, excelling as a technology consultant, sales engineer, and marketing communications leader. After a hiatus to prioritize caring for her children as a stay-at-home mom, she seamlessly transitioned into the role of a dedicated school volunteer, assuming various parent leadership positions. Throughout this time, Ninevah took on key leadership roles at the local, regional, and national levels within member-based community organizations. Recognized for her unwavering commitment to excellence, she approaches both professional and community work with genuine passion.

Currently, Ninevah holds the position of President on the Board of Trustees at University Prep High School in Seattle, WA. Simultaneously, she serves as a consultant with UNCF Pacific Northwest, dedicated to fostering access and opportunity for underserved scholars, showcasing her commitment to educational advancement and community impact. Ninevah holds a BS in Management Information Systems from the University of Alabama and earned her MBA from the University of Detroit Mercy. Alongside her husband, Bryant, she takes pride in parenting two children, Bryant, II ’24 and Neva-Nataia ’26.

Libby Miller

Retired, Vice President, Johnson & Johnson
As a graduate of Arizona State University and originally from Michigan, Libby has called Edmonds, WA home for the past 31 years. Retired from Johnson & Johnson as a VP of Sales, Libby managed teams delivering $300m in medical device sales. She is a member of North Sound Church, Mosaic Choir, and serves on the Advisory Board for Swedish Edmonds Hospital.  She has been part of Union Gospel Mission’s annual fund-raising gala and is an active volunteer with Vision House. After 30 years of frequent business travel, Libby relishes time with her husband, Steve and family, including two grandsons, Camden and Jack, son, Ian and daughter-in-law, Tami.