Our Team
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Mark Stoltz
Mark Stoltz brings a wealth of experience from the energy sector, having overseen major assets and led due diligence for large scale acquisitions and divestitures. Mark also co-founded and sits on the board of Knuula, a contract management software company. As founder and GP of Barnabas Ventures, he leverages his expertise in operations, complex deal management, and entrepreneurship to partner with faithful aspiring entrepreneurs, helping them acquire and operate companies redemptively.
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Andrew Winker
Andrew Winker works at the intersection of redemptive business, radical generosity of capital, and frontier markets. He brings nearly five years of experience from Bain & Company, where he excelled in corporate strategy, growth strategy, and organizational design across diverse industries. His consulting background is complemented by his time at Solugen, where he drove business development and commercial strategy. Andrew has also developed strategic initiatives in emerging markets, having worked with entrepreneurial ecosystems in Saudi Arabia and Egypt. A passionate, values-driven problem solver, his expertise in scaling businesses and developing entrepreneurial ecosystems makes him a key asset to the Barnabas Ventures team.
Spencer Bontrager
Spencer Bontrager brings a unique mix of engineering training, market expertise, and strategic consulting to his role. He previously worked at Koch Industries in market analytics and trading before leading global market intelligence initiatives at EuroChem in Switzerland, giving him international exposure and a strong foundation in systems-level thinking. Spencer earned his master’s in industrial engineering with a focus on optimization and statistical modeling, giving him a strong foundation for evaluating businesses and supporting high-caliber entrepreneurs. His consulting background and passion for mission-aligned business enable him to help entrepreneurs build operations that are disciplined, data-informed, profitable, and shaped by redemptive values.
Barnabas means Sons of Encouragement
Acts 11:22-26
22 News of this reached the church in Jerusalem, and they sent Barnabas to Antioch. 23 When he arrived and saw what the grace of God had done, he was glad and encouraged them all to remain true to the Lord with all their hearts. 24 He was a good man, full of the Holy Spirit and faith, and a great number of people were brought to the Lord.
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25 Then Barnabas went to Tarsus to look for Saul, 26 and when he found him, he brought him to Antioch. So for a whole year Barnabas and Saul met with the church and taught great numbers of people. The disciples were called Christians first at Antioch.