About us
About us
Established in 2006, Cortech Oil Services Limited (COSL) is a 100% indigenous company with over 20 years of proven experience delivering world-class integrated solutions across the energy value chain. We operate two pillars of excellence: our Upstream Division specialises in high-precision core retrieval and facility integrity, while our Downstream Division drives energy accessibility as a premier LPG Off-taker.
Our approach combines technical excellence and operational efficiency with an unwavering commitment to safety, quality, and environmental responsibility. We are driven by long-term partnerships, innovative solutions, and a deep understanding of the evolving energy landscape—positioning us as a trusted partner in delivering value across the energy value chain.
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Meet our Management Team

Mark Zellers
Jack Peterson
Maria Ed
Mark Zellers
Jack Peterson
Co Founder
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