SIS Holdings Group Appoints Marc Zuniga as Chief Operating Officer

HOUSTON - Amzeal -- SIS Holdings Group, a leading executive advisory firm specializing in IT strategy, cybersecurity, and fractional CIO/CISO leadership for energy and enterprise organizations, today named Marc Zuniga Chief Operating Officer. With more than 25 years of progressive IT and operational technology (OT) leadership across the energy sector, Zuniga's arrival marks a pivotal moment in the firm's continued growth.

With expertise spanning midstream pipelines, oil and gas, power generation, petrochemicals, and energy trading, Zuniga is positioned to help SIS Holdings scale its advisory practice and deliver greater value to private equity–backed companies navigating growth, M&A, and digital transformation. His specializations in SCADA modernization, Azure cloud adoption, IT/OT convergence, and OT cybersecurity align directly with the firm's core services.

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"Marc's track record of building enterprise technology functions from the ground up and translating those investments into measurable business outcomes makes him the ideal leader to guide our operations as we grow," said Stephen Webster, CEO of SIS Holdings Group. "His addition lets our senior advisors focus on what they do best — delivering exceptional, hands-on support to our clients."

"SIS has built a reputation for the executive-level, hands-on advisory that private equity sponsors and their portfolio companies genuinely need," said Zuniga. "I'm looking forward to scaling that model without diluting what makes it work."

Background

Most recently, as Vice President of IT and Cybersecurity (acting CIO) at EPIC Midstream, Zuniga built the company's entire IT and OT infrastructure from the ground up, directed an Azure migration of mission-critical SCADA workloads, and implemented Zero-Trust architecture across pipeline and maritime facilities — improving system resilience and efficiency by 40%.

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Earlier, he governed multimillion-dollar outsourcing agreements, generated eight-figure savings, and managed global end-user computing for Fortune 200 companies including Calpine and LyondellBasell. He founded Two Rivers Information Technology Consulting and holds a Bachelor of Arts in Mathematics from The University of Texas at Austin.

At SIS Holdings Group, Zuniga will oversee day-to-day operations — including resource allocation, staffing, and engagement quality — and ensure the consistent application of SIS methodology across every client engagement.

About SIS Holdings Group

SIS Holdings Group is an executive advisory firm delivering IT strategy, cybersecurity, and fractional CIO/CISO leadership to private equity–backed energy and enterprise organizations. The firm partners with portfolio companies to modernize technology functions, accelerate value creation, and de-risk operations through hands-on, executive-level engagement. Learn more at www.sis-holdings.com.