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Jill Vacek Stamets
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Jill Vacek Stamets

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At a glance

Full Name
Jill Melissa Stamets (née Vacek)
Title
Partner, Chief Financial Officer & Chief Compliance Officer
Firm
EIV Capital, LLC
Firm Type
Private equity / growth equity (energy-focused)
Investment Stage
Growth equity to lower-middle-market and mid-cap companies (not seed/venture)
Check Size
Not publicly disclosed per deal; firm manages ~$2–3B in committed capital across multiple funds (Fund IV was a ~$450M midstream fund; Fund V + EIV Resources II closed at ~$1.1B combined in 2026)
Target Company Profile
Small- and mid-cap energy companies with experienced management teams seeking capital for growth, expansion, or asset acquisition
Sector Focus
Energy — infrastructure/midstream (production, processing, transportation, storage, conversion of oil, natural gas, refined products, renewable fuels), upstream oil & gas, and opportunistic energy value-chain investments
Geographic Focus
North America (Lower 48 for upstream)
Location
Houston, Texas

Background

Jill Vacek Stamets is a Partner and the Chief Financial Officer / Chief Compliance Officer of EIV Capital, LLC, a Houston-based energy-focused private equity firm founded in 2009. She joined EIV Capital in 2014 and oversees the firm's financial reporting, controls, compliance, and fund operations across its growth-equity platform, which invests in the North American energy value chain.

Prior to EIV Capital, Jill served as Director of Finance and Controller of the Asset Management Division at Tudor, Pickering, Holt & Co., where she was responsible for financial reporting, controls, audit, and tax across the firm's platforms — including private equity funds, hedge funds, single-owner funds, and separately managed accounts — and was actively involved in investor relations, fund operations, and marketing. She began her career in the audit practice of Ernst & Young (EY), focusing primarily on the oilfield-services and private-equity industries.

Jill earned a B.B.A. in accounting and an M.S. in finance, both from Texas A&M University, and is a Certified Public Accountant (CPA) in the state of Texas. She has served as a board member of the EY Houston Alumni Advisory Council and of the Houston chapter of the Private Equity CFO Association (PECFOA).

As CFO/CCO, Jill is a firm principal on the finance and operations side rather than a deal-sourcing investment partner; founders typically encounter her in the context of fund operations, LP relations, closing mechanics, and compliance rather than initial deal evaluation.

Investment Thesis & Focus

  • EIV Capital is "an energy-focused growth equity investor." Its stated cornerstone: *"to partner with entrepreneurs, and to provide capital and operational experience to create long-term value for our stakeholders."*
  • Prefers energy infrastructure companies involved in the production, processing, transportation, storage, or conversion of oil, natural gas, refined products, and renewable fuels.
  • Also invests in upstream oil & gas (high-quality producing and undeveloped assets in the Lower 48) via its EIV Resources strategy, plus opportunistic bets across the broader energy value chain.
  • Focuses on North American companies and seeks businesses that are *"commodity tested and built to withstand market changes, regardless of the environment."*
  • Backs experienced management teams with an emphasis on reliable, environmentally responsible, and safe operations; leans on the team's operating and engineering expertise to move quickly on capital-needs and leadership assessments.
  • Multi-strategy platform (~$2.2B AUM as of Dec 2024; ~$3B committed capital cumulatively); 34+ active investments and 20+ realized exits historically.

Notable Investments

  • Bayou Midstream / Bayou Midstream II — midstream energy infrastructure platform.
  • H2O Midstream — produced-water midstream infrastructure company.
  • Canes Midstream — natural gas gathering and processing midstream operator.
  • Penrose Midstream Partners — midstream energy infrastructure company.
  • Viridis Chemical — bio-based / renewable chemicals producer.
  • AMP Americas / AMP Americas II — renewable natural gas (dairy RNG) developer.
  • Vivid Energy (d.b.a. Enersponse) — demand-response / energy-management platform.
  • Atlas Pressure Control — oilfield pressure-control equipment and services.
  • Intensity Infrastructure Partners, Fullstream Energy, CAM Integrated Solutions — additional active energy-infrastructure and services portfolio holdings.

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