Our Leadership

Nick Archer

President

Nick Archer’s 40 years of acclaimed global development experience span four continents and include 22 years of service at World Concern in a myriad of different leadership roles, including Vice President, and Acting President. He passed with Distinction, a Masters in Rural Society Development from the University of Reading, England. He holds certifications in International Development, Security Management, and Conflict Resolution.

As President of World Concern, Nick manages and oversees financial and business development strategies for the ministry, while representing the organization’s interest and programs with various partner agencies, consortiums, associations, churches and donors.

“We have the privilege of serving some of the most vulnerable people around the world at a time when conflict and climate change are undermining people’s ability to not only provide a meaningful future for their families, but even survive,” explains Nick. "Poverty, in its myriad forms, continues to extinguish the dignity of many, rob children of their childhood, and consign people to a life without hope. Our work is to stand alongside those we serve, and reflect in what we do, how we do it, and what we say, the love and grace of God at the point of peoples' need.” Nick and his wife Lisa have two grown children and three grandchildren.

Peter Macharia

Senior Director of Operations

Peter has served with World Concern in a number of capacities over the past 10 years, including as a regional grant writer, country director for South Sudan, Kenya country director, Africa regional disaster response director, Africa Area Director and currently as Senior Director of Operations.

Peter’s post-graduate studies in geography and sustainable development attained in Kenya and the Netherlands, combined with nearly two decades of experience in development, have equipped him with skills to serve in this capacity.

“It gives me a great sense of fulfillment to see the lives of poor individuals and communities transformed to abundance,” says Peter. “We work with marginalized and vulnerable communities to help them overcome poverty, build their resilience to disaster and climate change, and achieve holistic development. I am blessed to support such a dedicated team working so hard to create sustainable water systems, develop community managed financial institutions that bring affordable and convenient financial services to the very poor, and improve food security and nutrition to impoverished families.”

Katie Toop

Senior Director of Transformational Development

Katie grew up in the Seattle area but studied, worked, or served overseas for 13 years. She holds a Bachelor of Science in Physics from Bethel in Minnesota and a Master of Science with Distinction in Water and Environmental Management from Loughborough University’s Water, Engineering and Development Centre in the UK. Her international experience includes field-based positions and consultancies in both disaster response and community development in South and Central Asia and East Africa. Katie’s field work began with a focus on domestic water supply and sanitation but later broadened to integrated community development.

Katie joined World Concern in 2013 as a deputized worker in South Sudan. From 2014-2016, she served as World Concern’s Transformational Development Specialist for Africa, based in Nairobi. In 2016, she became the Director of Transformational Development and eventually moved back to Seattle. She loves teaching and facilitating, meeting new people, learning about new cultures, and leading worship. Compelled by God’s heart of relentless love for the poor and oppressed, her passion and commitment is to demonstrate compassion and promote justice wherever the Lord may lead.

Katie is a proud auntie to two nieces and four nephews.

Matt Rorabaugh

Senior Director of Finance and Compliance

Matt joined World Concern in 2021 and manages and oversees key activities and tasks in the areas of financial planning and analysis, compliance, and organizational strategies. Before joining World Concern, he served in finance leadership roles in the private sector, with extensive experience in supply chain finance with domestic and international suppliers. He holds a Bachelor of Science in Mathematics from the University of Puget Sound and a Certificate in Nonprofit Management from the Evans School of Public Policy and Governance at the University of Washington.

Matt loves teaching, coaching, analyzing, and researching. He has gladly engaged locally and globally for direct positive impact, leading in the work of youth ministries, global missions, and organizations fighting poverty. Driven by God’s deep love for the people of the world, he desires to come alongside poor and marginalized people in ways that promote hope, strength, justice, and dignity, helping people and communities thrive.

Mark Estes

Asia and Haiti Area Director

Mark’s role as Asia and Haiti Area Director is focused on strengthening and expanding national programs through quality initiatives and empowering leadership and partners to serve the unreached poor with the Light of the Gospel. Since Mark joined our team in early 2011 and relocated to Bangkok, Thailand, Mark led the restructure of the Asia office to move additional investments to our field programs and aligned to area and country level plans to new global strategies that have positioned expanded programs in our operational countries as well as new partnership opportunities.

Mark and his wife Marcia and their children are passionate about serving vulnerable and unreached children. They relocated to Seattle in 2015 where Mark continues his Asia leadership role and supports leadership development, strategic planning and expanded operational opportunities to increase World Concern’s qualitative as well as quantitative ministry to the poor. Mark holds an MA from Eastern University in International Organizational Leadership and brings over a decade of private sector corporate leadership and 20 years of International Leadership experience with another major Global Non Profits.

Mark oversees our work and partnerships in Haiti, Bangladesh, Laos, Nepal, Myanmar, Sri Lanka, and Vietnam.

Elias Kamau

Africa Area Director

Elias joined World Concern in 2007 and has served as Somalia Country Director, Haiti Emergency Coordinator and Deputy Africa Director before returning as Africa Director in 2023 after a 7-year hiatus. He has vast experience serving in complex emergencies, disaster response and development programs.

As Africa Area Director, Elias leads country teams to develop and grow transformational initiatives that build resilient communities and advance the Kingdom of God among the most vulnerable communities in Africa. He leads the teams in seeking out enhanced synergy in value aligned partnerships that engage communities to realize transformational impact in their disaster response and development initiatives. Elias focuses on cultivating leaders, ensuring good quality programming, growth and multiplication of impact to reach more vulnerable people.

Elias and his wife Phelista are blessed with a girl and a boy and they are passionate about families, especially vulnerable children and the youth. They make their home in Nairobi Kenya where they also provide leadership in families ministry at one of the largest churches in Nairobi. Originally a teacher and lecturer, Elias has also received post graduate training in organizational leadership and applied the same in over 20 years service with international organizations.

Elias is responsible for the ministry of World Concern in the following African countries; Kenya, Somalia, Uganda, South Sudan, Chad and the Democratic Republic of Congo-DRC. He also oversees World Concern partner relationships in Uganda.

Jeremy Reis

Vice President of Marketing

Jeremy leads the marketing, communications, and fundraising team at World Concern, raising resources to fight extreme poverty. Jeremy is passionate about seeing lives transformed – both physically and spiritually – and helping people and organizations partner with villages to see their stories change. Jeremy is the author of Magnetic Nonprofit and frequently speaks on increasing generosity for the nonprofit sector. Jeremy lives in Franklin, Tennessee with his wife Jennica and eight children.

Kelli Tolf

Vice President of Donor Relations

Kelli joined us from Washington State University Foundation, where she was most recently the Director of Development for the Regional Team. The regional team focused on fundraising for all ten colleges within the university, four branch campuses and many departments. During her 8 years at WSU, Kelli was part of the team that led the One Billion Dollar Comprehensive Campaign for WSU and formed the Elson S. Floyd College of Medicine, among other accomplishments. Prior to WSU, Kelli spent 6 years at the Skagit Valley College Foundation, as Assistant Director of Development. Kelli holds a degree in Public Relations from Washington State University.