winter-family-picture

Hi there. We are the Mueller family.

Harry is from Germany. Luna grew up in Germany, but is a true Croatian. Our daughter was born in Canada and our son in Germany.

Even when we got married in 2010, God had already put the calling in our hearts to serve Him in Croatia one day. We made the move to Croatia in 2020 and have been discovering His plans for us ever since.

God has called us into the house-of-prayer ministry. In a step of faith, Harry quit his job as a tourist agent and rafting guide in 2024 and proceeded to become the co-leader and now the pastor for UPPERROOM GORNJASOBA Zagreb, founded by Jerry and Zuzanna Low in 2015 in partnership with UPPERROOM Dallas. In addition, we started a house of prayer in our home in Karlovac in 2025.

While we are deeply grateful for the donors and miraculous support the Lord has provided us with, we also recognize that we have not been fully funded for life as a family and the ministry God is calling us to, even though Luna has been working full-time while Harry was transitioning into his calling.

You may have the same question we were asking:
“God, why would you call us into something and not fully resource us to do it?”

His answer came to Harry during a prayer set at UPPERROOM Dallas this spring:

“Remember how you never wanted to go back into the tourist business, because you were just catering to people’s superficial pleasures?

Why don’t you offer the same trips as before, but to Christians?
Why don’t you provide meaningful vacations with me at the center, which will actually transform your guests and provide for your family and ministry at the same time?”

As a result, here we are, setting up THE GOSPEL OUTDOORS to start operating in 2027.

Can we ask you a favor?

Now that you know a little bit about us,
would you contact us and let us know about you and what you think about our journeys?

We would love to meet you and get to know you more!

BA in Outdoor Leadership

Mountain Guide Mountaineering

Harry graduated with a BA in Outdoor Leadership from Columbia Bible College in Abbotsford, Canada.

This unique program prepared him both to lead people in various outdoor activities and trained him in biblical studies, theology and church ministry.

Professional experience

rafting river whitewater

After moving to Croatia, Harry took a job as outdoor guide and travel agent and worked in the secular tourism industry for 3 years.

During this time, he gained valuable insight into the industry and developed extensive local knowledge of his new home country.

Divine Design

Module 9 of 12, Advertising and Marketing finished! This time, I had to create an image campaign for a region or city of my choice. I choose to create a new logo, claim and three slogans with fitting images for my county. Since Karlovac County is geo
Finished module 7 (Logo Design) and 8 (Corporate Design). 🎉🎉🎉 The first three were ideas for a company called "Architecture and Design", the fourth were Logo ideas for a transport company of said name. I liked the 3rd A&D and the 2nd
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Aloha! 6th module of my graphic design school finished! This time, it was all about layout. The final assignment was to create a photographic, an abstract and a typographic magazine cover for a surfing magazine. It was actually more fun than i though
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4th assignment for my graphic design studies done! This time, it was all about typography, one of my all time favourite topics!!! 😍 I had to create a monogram from my own letters in antiqua, grotesque and cursive script. I learned, how our modern ca

Besides her job as a German-language customer care specialist, Luna has been training as a graphic designer and is launching her own business, DIVINE DESIGN.

She created our company logo and branding.

Isn’t her work excellent? Feel free to ask us about a quote for your graphic design needs.

Ready to Plan Your Next Journey?

Send us a quick note, and let’s start mapping out a truly meaningful adventure together.