Amberjack Capital Partners

What Amberjack Capital Partners does

Amberjack Capital Partners is a Houston-based, employee-owned private equity firm founded in 2006 (originally as Intervale Capital and rebranded in May 2021) that invests in lower middle-market companies generating $5-25 million of EBITDA in the critical infrastructure services and industrial end markets. The firm operates a sector-specialist, operations-driven investment model, partnering with founder-led businesses as their first institutional capital provider and working alongside management teams to scale operations, pursue strategic acquisitions, and expand geographic reach.

The firm generates revenue through traditional private equity fund management economics, earning management fees on committed capital deployed across portfolio companies plus carried interest on realizations. As of the latest disclosed data, the firm has raised $2.1 billion in committed capital since inception and invested in over 50 companies, with current portfolio companies spanning oilfield services (Innovex, Taurex Drill Bits, Rod & Tubing Services, Aegis Chemical Solutions), energy production (EnerCorp, Tier 1 Energy Solutions), power generation (FlexEnergy Solutions), industrial heat treating (Industrial Thermal Services), and environmental and waste services (CIMA Services). Recent realized investments include Entegra (pipeline inspection, exited 2025), Best Trash (municipal waste, exited 2024), and Milestone Environmental Services (exited 2023).

The go-to-market model is relationship-driven, relying on direct outreach to founder-led businesses, intermediary referrals, and Gulf Coast industry relationships rather than competitive auctions. The investment team is supported by a complementary operating-partner bench (including a former portfolio company CFO) and is led by Managing Partner Jason Turowsky following the 2024 passing of Co-Managing Partner Patrick Connelly. The firm maintains an SEC-registered investment advisor structure and operates from a single headquarters in Houston, Texas.

Name

Amberjack Capital Partners

Legal name

Amberjack Capital Partners, L.P.

Website

https://amberjackcapital.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

11–50 employees

Short description

Amberjack Capital Partners is a Houston-based, employee-owned private equity firm that invests in founder-led, lower middle-market companies (typically $5-25M EBITDA) in critical infrastructure, industrial, and environmental services, deploying capital as the first institutional partner.

Ownership category

akta.pro rank

Product category

Private Equity Investment Management

NAICS

Portfolio Management and Investment Advice (52394), Other Investment Pools and Funds (5259)

SIC

Investment Advice (6282)

akta.pro industry

PRIMARYFSANACAA

Technology & Software Growth Equity

Financial & Insurance/Private Equity & Venture Capital/Growth Equity Firms

Keywords

• Private equity investing
• Critical infrastructure services
• Lower middle market investments
• Industrial services investing
• Environmental services investing

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Private Equity Fund Management: Amberjack Capital generates revenue through management fees and carried interest (performance fees) from managing private equity funds focused on critical infrastructure services. The firm raises capital from institutional investors and deploys it into portfolio companies, earning returns through operational improvements and eventual exits.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Amberjack Capital Partners is a Houston-based, operations-driven, lower middle-market private equity firm that invests in critical infrastructure services and industrial end markets. The firm partners with founder-led businesses typically generating $5-25 million in EBITDA, providing growth capital, strategic guidance, and operational resources to build durable market-leading companies. Revenue is earned through management fees and carried interest on privately offered investment funds.

Product overview

Amberjack Capital Partners is a private equity firm, not a product company. As an investment firm, it does not offer products or services in the traditional sense. The firm specializes in critical infrastructure services, investing in portfolio companies that provide industrial, infrastructure, and environmental services. Active portfolio companies include CIMA Services (waste management and environmental remediation), Industrial Thermal Services (heat treating and specialty mechanical services), Aegis Chemical Solutions, EnerCorp (well flow management), Flex Energy Solutions (gas turbine power), Innovex (downhole products for energy), Rod & Tubing Services, Taurex Drill Bits, and Tier 1 Energy Solutions (completions and production products). Realized investments include Best Trash, Entegra, Milestone Environmental Services, TorcSill Foundations, and Transform Materials.

Differentiator

Problem solved

Functional benefit

Named customers5 records

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Six partnerships are on record, tiered legal_counsel, strategic, major_exit, portfolio and realized.

• Sidley Austin LLPlegal_counselOthers · 19 February 2026Sidley Austin LLP served as legal counsel to Amberjack for the CIMA Services partnership.
• Grafine PartnersstrategicStrategic or Co-development Partner · 15 October 2025Grafine Partners announced a strategic partnership with Amberjack Capital Partners on October 15, 2025. The partnership aims to enhance Amberjack's growth in the infrastructure and industrial services sectors, leveraging Grafine's expertise and network.
• NDT Globalmajor_exitStrategic or Co-development Partner · 31 July 2025Amberjack successfully exited Entegra through its sale to NDT Global. Entegra is a premium integrity and inspection company specializing in Ultra-High-Resolution Magnetic Flux Leakage (UHR MFL) in-line pipeline inspection services. NDT Global is a leading provider of advanced diagnostic inspection and integrity solutions for the energy sector.
• Enterprise Group, Inc.strategicStrategic or Co-development Partner · 1 May 2025FlexEnergy Solutions completed the sale of its Canadian operations (Flex Leasing Power and Service ULC) to Enterprise Group, Inc. The acquisition provides Enterprise with exclusive supply rights for FlexEnergy's turbines in Canada.
• FlexEnergy SolutionsportfolioOthersFlexEnergy Solutions is a portfolio company of Amberjack Capital Partners providing reliable, clean, on-demand power solutions through gas turbine technology.
• EntegrarealizedOthersEntegra is a realized portfolio company of Amberjack Capital Partners. It was a leading provider of pipeline inspection products and services specializing in Ultra-High-Resolution Magnetic Flux Leakage (UHR MFL) in-line pipeline inspection services.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• White Deer Energy: Houston-based middle-market private equity firm investing in energy and industrial services companies. Highly comparable to Amberjack in geography, sector focus (energy services / industrial), and lower middle-market check size; previously acquired TorcSill Foundations from Intervale/Amberjack.
• Wynnchurch Capital: Lower middle-market private equity firm investing in industrial services, infrastructure services, and business services. Directly comparable in target company EBITDA range, operations-driven value creation playbook, and focus on founder/family-owned businesses.
• Trive Capital: Lower middle-market PE firm headquartered in Dallas focused on industrial, infrastructure, and specialty distribution. Comparable in fund size, target company profile ($5-25M EBITDA industrial/infrastructure businesses), and sector overlap with Amberjack's portfolio.
• Comvest Partners: Middle-market private investment firm focused on business services, industrial, and infrastructure services. Directly comparable to Amberjack in target EBITDA range, sector focus, and operations-driven approach to lower middle-market industrial companies.
• Sentinel Capital Partners: Lower middle-market PE firm focused on industrial, business services, and healthcare. Directly comparable in target EBITDA range, operations orientation, and focus on founder/family-owned businesses in industrial end markets.
• Audax Group: Private investment firm executing buy-and-build strategies in lower middle-market industrial, business services, and healthcare companies. Comparable in thesis of building platforms through add-on M&A in industrial/infrastructure services.
• Olympus Partners: Middle-market PE firm investing in business services, industrial, and consumer. Comparable in lower middle-market industrial services focus and operations-driven value creation model.

Broad incumbents

• SK Capital Partners: Private investment firm focused on specialty materials, chemicals, and life sciences. Comparable as a fund manager that acquires industrial-services-adjacent businesses from PE sponsors (acquired Milestone Environmental Services from Amberjack in 2023); larger AUM and broader sector mandate than Amberjack.
• Stonepeak Partners: Infrastructure-focused private investment firm with significant AUM. Comparable as infrastructure-services-adjacent investor with industrial focus, but operates at significantly larger scale and broader infrastructure mandate than Amberjack's lower middle-market focus.
• Energy Capital Partners: Private investment firm focused on power generation, energy infrastructure, and environmental services. Comparable in energy and infrastructure services sector overlap, but operates at materially larger scale and broader mandate than Amberjack.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/intervalecapital

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A6 records

Investments12 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Amberjack Capital Partners