Environmental & Sustainability

Impactful strategic guidance for the circular economy

GulfStar’s Environmental & Sustainability Practice is focused on companies whose core products and critical services mitigate environmental impact, specifically those committed to energy and resource efficiency, environmental services, waste remediation, and cleantech. GulfStar maintains deep relationships with industry and private equity investors, lenders and other providers that serve this burgeoning sector.

Sub-sectors include:

  • Air Quality
  • Data Centers & Mission Critical Infrastructure
  • Energy Efficiency
  • Energy Transition
  • Environmental & Emissions Monitoring
  • Environmental Recovery Services
  • Environmental Remediation
  • Recycling
  • Regulatory Compliance Monitoring & Services
  • Resource Conservation
  • Sustainable Products
  • Waste Collection & Processing Services

Related Transactions

a portfolio company of
has sold its scrap metal division to

Industry
Industrial Services & Manufacturing
Environmental & Sustainability
Services
Mergers & Acquisitions

Based in North Carolina, Wall Recycling is a premier provider of integrated waste and recycling solutions. With a commitment to sustainability and innovation, Wall Recycling provides full-service waste management for both commercial and consumer customers. This divestiture allows Wall Recycling to strategically focus on its core integrated waste operations. The Company plans to make additional acquisitions, looking to build upon its strong waste platform while maintaining its leadership in the North Carolina market.

has completed a majority recapitalization with

Industry
Industrial Services & Manufacturing
Environmental & Sustainability
Business Services
Software & Tech-Enabled Services
Services
Mergers & Acquisitions

Divcon Controls provides building automation consultation and custom design for the commercial and manufacturing industries.

a portfolio company of
has been acquired by

Industry
Energy, Power & Infrastructure
Industrial Services & Manufacturing
Environmental & Sustainability
Services
Mergers & Acquisitions

Founded in 1985 and based in Deer Park, Texas, Miller Integrated Solutions is a leading industrial cleaning, environmental, and mechanical services company that operates within the downstream, midstream, and upstream hydrocarbon processing markets. With six strategically located facilities across its Gulf Coast footprint, Miller Integrated Solutions leverages its 400+ field-based crewmembers to support over 100 master service agreements across multiple recurring, maintenance-driven, service disciplines including tank cleaning, unmanned hydroblasting, vacuum truck services, spill cleanup, air mover & hydro excavation, chemical cleaning, vapor control, rubber lining & coating services, field specialty welding, mechanical maintenance and fabrication. The Company also has extensive experience in the environmental spill response industry and can build, clean and demolish equipment and structures, as well as support any environmental needs throughout the lifecycle of its customers.

a portfolio company of
has completed a majority recapitalization with

Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Based in Odessa, Texas, and established in 2003, eTech is a leading environmental remediation business providing regulatory mandated environmental consulting, soil sampling & testing, remediation, waste management, and long-term compliance services to a large base of blue-chip customers in the upstream, midstream, government, and industrial end markets throughout the Permian Basin. With over 125 skilled environmental technicians and professionals in the field, a top-tier safety record, and a robust portfolio of Master Service Agreements, the Company’s services allow them to work in a diverse array of environmental disciplines, including soil and groundwater testing, remediation, asbestos, mold and lead consulting, federal and state permitting assistance, and a broad range of compliance support. The partnership with KLH will enable the Company to accelerate its growth and continue to expand its service offerings throughout the United States.

has received a minority growth investment from

Industry
Industrial Services & Manufacturing
Environmental & Sustainability
Services
Mergers & Acquisitions
Raising Capital
Cross-Border Transactions

Headquartered in Clackamas, Oregon, PNW operates a full-service ferrous and non-ferrous metal recycling business. The Company sells its recycled metal product to both international and domestic markets. PNW gathers scrap in North America and sells hundreds of thousands of tons of recycled metals to hundreds of domestic and international customers per year. PNW’s services are key to a growing circular economy, offering a low-cost replacement to virgin metal production. Recycled steel scrap saves approximately 70% of energy (95% for aluminum) and 55% of CO2 emissions when compared to virgin materials, according to the World Steel Association.

has sold its industrial cleaning division to

Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Through its subsidiaries, Matrix is a leading North American industrial engineering, construction, and maintenance contractor headquartered in Tulsa, Oklahoma with offices located throughout the United States and Canada, as well as Sydney, Australia and Seoul, South Korea. The Company provides services in three key operating segments: utility and power infrastructure, process and industrial facilities, and storage and terminal solutions.

has been acquired by

Industry
Industrial Services & Manufacturing
Services
Mergers & Acquisitions

Founded in 2011 and based in Houston, Momentum provides exterior and interior glass and glazing solutions to the Texas region. Momentum delivers a complete line of design, manufacture and install services to meet the most demanding exterior and interior applications for commercial building projects in education, healthcare, municipal, office, multi-family and airport end markets.

has been acquired by

Industry
Industrial Services & Manufacturing
Services
Mergers & Acquisitions

Since 1979, C&D has been the Greater Houston Area’s premier scrap metal recycler. Led by Co-Founders Cindy and Dennis Laviage, C&D has become a household name across Houston given the team’s emphasis on and successful execution of its retail advertising campaigns. The Laviages built unrivaled brand recognition via near-constant television and radio commercials, establishing the now ubiquitous “We Pay You in $2 Bills!” trademark which generated over 14.6 million television and 15.0 million radio impressions in 2021 alone.

has been acquired by
a portfolio company of
Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Founded in 1986 and headquartered in Baytown, Texas, EMSI is a leading environmental services company providing emissions leak detection and repair services. The Company designs and administers programs necessary for client compliance with a complex array of federal, state and local environmental regulations. EMSI employs more than 300 technicians within some of the largest refineries, petrochemical, natural gas processing, oil and gas pipeline, and specialty chemical plants in the United States. It serves more than 150 facilities in 38 states across the nation, with a leading presence in the Gulf Coast region.

a portfolio company of
has divested TriStar PetroServ and Global Vapor Control to
a portfolio company of
Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

TriStar Global Energy Solutions, one of the leading hydrocarbon cleaning and decontamination companies in the U.S., elected to divest two subsidiaries: TriStar PetroServ and Global Vapor Control (collectively referred to as TriStar Tank Services). TTS provides specialized services focused on technical tank cleaning and degassing in refineries and midstream facilities in the Gulf Coast and throughout the United States.

has completed a private placement of common membership units

$4,000,000

Industry
Environmental & Sustainability
Business Services
Healthcare
Services
Raising Capital

Paragon Southwest Medical Waste (PSMW), which completed its second round of financing in November 2019, utilizes its patented CoronaLux™ technology to thermally destroy certain types of medical waste. This new financing will increase the capacity of PSMW’s facility in Anahuac, Texas by over 100%, allowing the Company to meet the high demand for its services. The CoronaLux™ system employs a low-energy, plasma-enhanced, pyrolytic process to safely and reliably destroy hazardous, chemical, biological, pharmaceutical and regulated medical waste. It also significantly reduces harmful emissions associated with high-temperature thermal processes such as incineration and conventional hot plasma incineration. The result is a more efficient and sustainable destruction process, which is much cleaner, safer and environmentally friendly.

has been recapitalized by

Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Tanknology is the largest provider of environmental compliance testing and inspection services for retail fuel providers in the United States. Headquartered in Austin, Texas, the Company services more than 50,000 petroleum fueling and storage facilities per year, offers more than 30 compliance-related service offerings and holds 22 patents for leak detection and tank monitoring technology. Internationally, Tanknology licensees span more than 30 countries, providing services to the largest petroleum operators in the world.

has been acquired by

Industry
Environmental & Sustainability
Software & Tech-Enabled Services
Services
Mergers & Acquisitions

Founded in 1994, New Century is a leading provider of pipeline integrity management software and services to energy transportation companies. The Company is headquartered in Fort Collins, Colorado and provides software solutions, data management expertise, and extensive pipeline experience to enable a global network of customers in the oil and gas industry to manage pipeline integrity, meet regulatory compliance, and maximize safety and reliability.

has been acquired by

Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Founded in 1979 and headquartered in Seattle, Global is an international leader in the marine services industry with decades of experience managing complex, critical, and technical projects in and around the water. Operating in some of the most challenging environments, the Company’s skilled and seasoned professionals offer clients five core services: marine construction, casualty response, environmental services, commercial diving, and energy services. The Company has six locations in the western U.S. and serves clients both domestically and abroad. Global will continue to operate under its current brand as a wholly-owned subsidiary of MER.

has been acquired by
a portfolio company of
Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Perennial, a provider of environmental consulting and inspection services, specializes in the preparation of environmental documents that comply with the National Environmental Policy Act (NEPA) and other federal, state, and local environmental laws and regulations. The Company’s capabilities include complete surveys and evaluations for biological and physical resources, cultural resources, and other environmental studies and inspections essential to ensuring environmental compliance. Perennial’s team of biologists, scientists, toxicologists, and environmental professionals provides technical environmental solutions and management with fresh perspectives and unparalleled efficiency.

along with other investors

have formed and invested in

Paragon Southwest Medical Waste

Industry
Environmental & Sustainability
Business Services
Healthcare
Services
Mergers & Acquisitions
Buy-Side Advisory

Paragon Southwest Medical Waste (PSMW) was formed through a joint venture agreement between Paragon Waste Solutions (PWS) and Gulfwest Waste Solutions (GWS) combined with an equity investment from an investment group. PSMW’s permitted medical waste facility in Texas uses Paragon’s patented CoronaLux™ system. This system employs a low-energy, plasma-enhanced pyrolytic process to safely and reliably destroy hazardous, chemical, biological, pharmaceutical and regulated medical waste. The CoronaLux™ system significantly reduces harmful emissions associated with high-temperature thermal processes such as incineration and conventional hot plasma incineration. The result is a more efficient and sustainable destruction process, which is much cleaner, safer and environmentally friendly.

has been acquired by

Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Software & Tech-Enabled Services
Services
Mergers & Acquisitions

GeoFields is a leading global supplier of software and services for pipeline integrity data collection, management and risk analysis for the oil and gas industry. GeoFields’ software enables pipeline operators to collect critical integrity data, perform risk modeling and high consequence area (HCA) risk analysis, and prioritize pipeline integrity-related maintenance and asset management activities. The Company is headquartered in Atlanta, with offices in Houston and Denver.

a portfolio company of
has been acquired by
a portfolio company of
Industry
Environmental & Sustainability
Business Services
Services
Mergers & Acquisitions

SouthWaste Services Holdings, LLC. and its subsidiaries (collectively “SouthWaste” or the “Company”) is a leading, vertically-integrated environmental services firm providing non-hazardous liquid waste collection, processing, and disposal services across the southern U.S.  SouthWaste provides grease trap (i.e., brown grease) and commercial septic waste collection, cleaning, and maintenance services for over 4,600 customers which include restaurants, grocery stores, prisons, stadiums, hospital systems, and school districts. The Company’s five permitted processing and disposal facilities (Houston, Dallas, San Antonio, Lubbock, and Orlando) process over 91 million gallons of waste annually.

has been acquired by

Industry
Industrial Services & Manufacturing
Environmental & Sustainability
Services
Mergers & Acquisitions

SER is a leading service provider of geotechnical and environmental drilling, environmental remediation, amphibious excavation and marine transportation in logistically difficult marine environments. These areas include wetlands, swamps, bayous, rivers and other inland and near-shore bodies of water inaccessible to conventional drilling and excavation equipment. The Company, based in Carencro, LA, has provided these specialized services nationwide since its formation in 2004.

divested its frac tank rental division to an

Undisclosed Buyer

Industry
Energy, Power & Infrastructure
Services
Mergers & Acquisitions

Terra Renewal rents frac tanks and half pits to oilfield service providers and operators of oil and gas wells. Its tanks are typically used to store water used in the completion of new wells and capture water and fluids flowing back from the wells as oil and gas is extracted, and are lined to resist the corrosive effect of these liquids. Terra Renewal’s tanks are located in major oil and gas production areas of Oklahoma, Pennsylvania and Texas. The Company owns 248 wheeled frac tanks with 500 barrel capacity and 48 half-pits, which are essentially similar but smaller tanks used in the collection of used production fluids in lieu of earthen pits or other temporary, less environmentally friendly solutions.

has completed a majority recapitalization with

Industry
Industrial Services & Manufacturing
Environmental & Sustainability
Services
Mergers & Acquisitions

Battery Solutions, Inc. is one of the largest independent providers of turnkey battery recycling solutions including program design, collection systems, logistics, disassembly, chemistry identification, sorting, separation, regulatory compliance and documentation. The Company is headquartered in Howell, Michigan with additional facilities in Brighton, Michigan and Mesa, Arizona.

has completed a majority recapitalization with

Industry
Energy, Power & Infrastructure
Environmental & Sustainability
Services
Mergers & Acquisitions

Headquartered in Austin, Texas since its formation more than 25 years ago, Flare Industries is an industry leader in the design, manufacture and installation of combustion and pollution control technology and equipment. Through its offices in the United States, Canada, United Kingdom, United Arab Emirates and Singapore, Flare delivers high-quality flare systems, thermal oxidizers and ignition systems to clients in a range of industries worldwide. Flares are devices which burn, combust, or oxidize industrial gaseous wastes in a safe, controlled and efficient manner.

a portfolio company of
has been acquired by

Industry
Consumer Products & Services
Environmental & Sustainability
Services
Mergers & Acquisitions

Headquartered in San Rafael, California, Worldwise Holdings, Inc. is the leading supplier of highly innovative, environmentally friendly dog and cat products including beds, toys, scratchers, treats and litter accessories. The company’s products are developed primarily from natural, certified organic, reclaimed or recycled materials and are sold through major retailers including Walmart, Target, PetSmart, PETCO and Dollar General, in more than 30,000 stores.

has completed a merger and recapitalization with
a portfolio company of
Industry
Energy, Power & Infrastructure
Software & Tech-Enabled Services
Services
Mergers & Acquisitions

Based in Houston, TX, Entessa is a leading provider of logistics management software for the oil and gas supply chain. The Company’s core software solution, Synthesis™, was launched in 2006 and enables its customers to optimize their supply chain. Synthesis™ is an order-to-cash proprietary enterprise software program developed by Entessa that allows midstream, downstream and fully integrated energy companies to manage the logistical scheduling and operations, inventory management, billing and invoicing aspects of their business within one integrated product suite.

has completed a majority recapitalization with

Industry
Environmental & Sustainability
Business Services
Services
Mergers & Acquisitions

SouthWaste was founded in 2004 by GulfStar Merchant Banking and Company management as a platform for creating the premier provider of non-hazardous liquid waste collection and processing services. Since that time SouthWaste has closed and integrated eight acquisitions covering the markets of Houston, Dallas-Ft. Worth, Austin, San Antonio and Lubbock, Texas, Atlanta, Georgia and central Florida. Primary services include vacuum removal of waste from grease traps at food services establishments such as restaurants, grocery stores, schools, hospitals and prisons; removal of residuals from municipal water treatment plants and septic systems; and processing of these waste streams for final disposal.

has acquired
from

Heritage Operating, LP

Industry
Environmental & Sustainability
Business Services
Services
Mergers & Acquisitions
Buy-Side Advisory

SouthWaste Services, Inc. is a Houston-based company formed in 2005 that provides non-hazardous liquid waste vacuum services, sewer cleaning, waste hauling and disposal. The liquid wastes handled by the Company include wastewater, sewage, sludge, grease, grit and leachate. SouthWaste currently has operations in Houston, Dallas–Ft. Worth, Austin, San Antonio, Lubbock, Texas, Orland, Florida and Atlanta, Georgia.

has acquired

Whole Earth Organic Composting, LLC

Industry
Environmental & Sustainability
Business Services
Services
Buy-Side Advisory

SouthWaste was founded in 2004 by GulfStar Merchant Banking and Company management as a platform for creating the premier provider of non-hazardous liquid waste collection and processing services. Since that time SouthWaste has closed and integrated eight acquisitions covering the markets of Houston, Dallas-Ft. Worth, Austin, San Antonio and Lubbock, Texas, Atlanta, Georgia and central Florida. Primary services include vacuum removal of waste from grease traps at food services establishments such as restaurants, grocery stores, schools, hospitals and prisons; removal of residuals from municipal water treatment plants and septic systems; and processing of these waste streams for final disposal.

has completed a private placement

$23,800,000

Industry
Environmental & Sustainability
Business Services
Services
Raising Capital

SouthWaste Services, Inc. is a Houston-based company formed in 2005 that provides non-hazardous liquid waste vacuum services, sewer cleaning, waste hauling and disposal. The liquid wastes handled by the Company include wastewater, sewage, sludge, grease, grit and leachate. SouthWaste currently has operations in Houston, Dallas–Ft. Worth, Austin, San Antonio, Lubbock, Texas, Orland, Florida and Atlanta, Georgia.

has acquired

Alco Environmental, CapTex, GTM Waste Services, National Hospitality Services, SOJO Treatment

Industry
Environmental & Sustainability
Business Services
Services
Mergers & Acquisitions
Buy-Side Advisory

SouthWaste was founded in 2004 by GulfStar Merchant Banking and Company management as a platform for creating the premier provider of non-hazardous liquid waste collection and processing services. Since that time SouthWaste has closed and integrated eight acquisitions covering the markets of Houston, Dallas-Ft. Worth, Austin, San Antonio and Lubbock, Texas, Atlanta, Georgia and central Florida. Primary services include vacuum removal of waste from grease traps at food services establishments such as restaurants, grocery stores, schools, hospitals and prisons; removal of residuals from municipal water treatment plants and septic systems; and processing of these waste streams for final disposal.

has completed a private placement

$19,400,000

Industry
Environmental & Sustainability
Business Services
Services
Raising Capital

SouthWaste was founded in 2004 by GulfStar Merchant Banking and Company management as a platform for creating the premier provider of non-hazardous liquid waste collection and processing services. Since that time SouthWaste has closed and integrated eight acquisitions covering the markets of Houston, Dallas-Ft. Worth, Austin, San Antonio and Lubbock, Texas, Atlanta, Georgia and central Florida. Primary services include vacuum removal of waste from grease traps at food services establishments such as restaurants, grocery stores, schools, hospitals and prisons; removal of residuals from municipal water treatment plants and septic systems; and processing of these waste streams for final disposal.

has been acquired by

Industry
Industrial Services & Manufacturing
Services
Mergers & Acquisitions

MET provides proprietary technology solutions to the refining, steel and specialty chemical industries. Often using modular concepts, this niche company treats industrial wastewater and offers byproduct chemical recovery services through long-term service agreements whereby MET typically owns and operates facilities for its customers.

has been acquired by

GTS Duratek

Industry
Environmental & Sustainability
Services
Mergers & Acquisitions

DuraTherm provides advanced technologies and services for petroleum remediation, waste management, and resource recovery. These are available worldwide to petroleum and petrochemical related industries, environmental companies, and governmental organizations.

has completed an acquisition and working capital financing

$7,000,000

consisting of
Industry
Environmental & Sustainability
Services
Raising Capital

DuraTherm provides advanced technologies and services for petroleum remediation, waste management, and resource recovery. These are available worldwide to petroleum and petrochemical related industries, environmental companies, and governmental organizations.

has completed a private placement

$18,000,000

consisting of
Industry
Environmental & Sustainability
Services
Raising Capital

MET provides proprietary technology solutions to the refining, steel and specialty chemical industries. Often using modular concepts, this niche company treats industrial wastewater and offers byproduct chemical recovery services through long-term service agreements whereby MET typically owns and operates facilities for its customers.

GulfStar Group
700 Louisiana Street
Suite 3800
Houston, Texas 77002


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