Leighton Group
Verdantas is a US-headquartered, privately held environmental science and engineering consulting firm serving enterprise and government clients across power, water, government, industrial, renewable energy, transportation, technology, real estate, and oil & gas markets.
- Company typePrivate
- Founded1961
- HeadquartersIrvine, United States
- Headcount101–250
- GTM typeB2B
- OfferingServices
What Leighton Group does
Verdantas is a US-headquartered, privately held environmental science and engineering consulting firm that delivers integrated services across ten named end-markets: power delivery, water, government, industrial, renewable energy, transportation, power generation, technology, real estate, and oil & gas. The firm positions itself around the combination of environmental science expertise and full-stack engineering capability, claiming that this integrated blend unlocks problem-solving on complex, regulated assignments that single-discipline firms decline.
The platform is organized into two core solution categories — Environmental Science and Engineering — supported by three named key differentiators (River and Flow-Related Solutions, Digital Technologies, and Superfund Project Coordination & Liability Management) and three growth accelerators (Recreation & Resort Development, Stormwatershed 360, and Data Centers). Underneath the solutions layer sits roughly twenty discrete expertise areas spanning environmental assessment and remediation, environmental health and safety, natural resources planning, sustainability advisory, CERCLA/RCRA multiparty remediation, and a full engineering stack from architecture and surveying to geotechnical, structural, mechanical, electrical, automation, water/wastewater systems, hydrology/hydraulics, and site/roadway civil engineering. A sub-brand, Stormwatershed 360, anchors the stormwater and watershed offering, and the firm operates dedicated public Plan Room (bids.verdantas.com) and News & Insights channels targeting regulated and government audiences.
Commercially, Verdantas operates a relationship-based, enterprise and government field-sales motion, engaging clients on a project-by-project basis typical of B2B professional services. Pricing is not publicly disclosed; engagements are quoted per project. The firm maintains operational geographies in the United States and India (with separate US and India career pages), executed a Northeast-focused acquisition of Yu & Associates in June 2026, and shows no disclosed parent company, private equity sponsor, or institutional investor ownership. Revenue, funding, and pricing details are not in the public source set, and headcount is not explicitly stated; firmographic inputs in the broader data set indicate a mid-market private employer in the 101–250 employee range.
Leighton Group firmographics
Firmographics- Name
- Leighton Group
- Legal name
- Verdantas
- Website
- https://leightongroup.com
- Company type
- Private
- Founded year
- 1961
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Verdantas is a US-headquartered, privately held environmental science and engineering consulting firm serving enterprise and government clients across power, water, government, industrial, renewable energy, transportation, technology, real estate, and oil & gas markets.
- Ownership category
- akta.pro rank
Leighton Group industry classification
Industry- Product category
- Environmental and Engineering Consulting Services
- NAICS
- Environmental Consulting Services (54162), Engineering Services (541330), Architectural, Engineering, and Related Services (5413)
- SIC
- Services-Engineering Services (8711), Services-Commercial Physical & Biological Research (8731)
- akta.pro primary industry
- Water, Wastewater & Stormwater Compliance (BPAHAJAJ)
- akta.pro secondary industries
- Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD), Online Monitoring, Sensors & Instrumentation (SCADA-integrated analyzers, probes, samplers) (EUANAJAC), Sustainable/Green Building & LEED Consulting (BPAHAKAG)
Keywords
Where Leighton Group is headquartered
LocationHeadquarters
- HQ city
- Irvine
- HQ country
- United States
- HQ region
- North America
Markets served
Leighton Group business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Others
Revenue model
- Professional Engineering and Environmental Services: Provides integrated engineering and environmental science consulting services across multiple markets and expertise areas. Revenue generated through professional services engagements for environmental assessment, remediation, engineering design, and regulatory compliance services.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Leighton Group product offering
Product offeringCore offering
Verdantas is an integrated environmental science and engineering consulting firm that delivers professional services combining environmental science (assessment, remediation, health and safety, natural resources planning, sustainability advisory) with comprehensive engineering capabilities (architecture, automation, electrical, geotechnical, hydrology, mechanical, structural, surveying, water/wastewater systems). The firm solves complex challenges at the intersection of infrastructure and environment across markets including power, water, government, industrial, renewable energy, transportation, real estate, oil and gas, and technology.
Product overview
Verdantas is an integrated environmental science and engineering consulting firm that delivers solutions across environment, water, and energy transition markets. The company operates as a unified platform combining environmental science expertise (environmental assessment and remediation, environmental health and safety, natural resources planning, sustainability advisory) with comprehensive engineering services (architecture, automation, digital technologies, electrical, geotechnical, hydrology, mechanical, structural engineering, surveying, water/wastewater systems). Key differentiators include River and Flow-Related Solutions, Digital Technologies, and Superfund Project Coordination & Liability Management. Growth accelerators span Recreation & Resort Development, Stormwatershed 360, and Data Centers. The firm serves markets including Power Delivery, Water, Government, Industrial, Renewable Energy, Transportation, Power Generation, Technology, Real Estate, and Oil & Gas.
Differentiator
Problem solved
Functional benefit
Brands
- Stormwatershed 360: Stormwater management solution offering
Products and services
- Environmental Science Solutions
Companies that use Leighton Group
Customer profileSegments10 records
Ideal customer profiles1 record
Leighton Group technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Leighton Group partnerships and signals
Strategic signalScale indicators1 record
Recent moves6 records
Expansion highlights6 records
Leighton Group competitors and assessment
Company assessmentBroad incumbents
- AECOM: Global infrastructure consulting giant with a sizable Environment and Water practice. Overlaps Verdantas across environmental compliance, water, and engineering but at much larger scale and broader portfolio.
- WSP Global: Global professional services firm with deep environmental, water, and Earth & Environment practices — overlaps with Verdantas in transportation, water, and environmental engineering.
- Jacobs Solutions: Large engineering and consulting services firm; competes with Verdantas on environmental remediation, water, and infrastructure projects.
Direct peers
- Haley & Aldrich: Environmental and geotechnical engineering consultancy focused on complex site investigations and remediation — directly comparable to Verdantas' CERCLA/RCRA and environmental assessment work.
- Stantec: North American engineering and environmental consulting firm with strong water and environmental services — comparable to Verdantas across multi-vertical environmental and infrastructure work.
- Arcadis: Global design and consultancy with a strong environmental, water, and sustainability practice — directly comparable in environmental assessment, remediation, and water infrastructure work.
- Tetra Tech: The largest pure-play environmental and engineering consulting firm. Directly comparable to Verdantas across environmental science, water resources, and remediation services for government and industrial clients.
- Brown and Caldwell: Employee-owned environmental engineering firm specializing in water and wastewater — directly comparable to Verdantas' Water and Wastewater Systems Engineering expertise.
- ERM (Environmental Resources Management): Global pure-play environmental, health, safety, and sustainability consultancy — directly competes with Verdantas' environmental science and EHS advisory offerings.
Emerging players
- Montrose Environmental Group: Public environmental services firm focused on testing, advisory, and remediation — comparable to Verdantas' environmental testing and EHS/ESG advisory offerings, with similar growth-via-roll-up profile.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights5 records
Customer concentration
Leighton Group social profiles
Digital presenceLeighton Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
Leighton Group leadership team
Management profileNumber of profiles
Leighton Group subsidiaries and ownership
Company hierarchySubsidiaries1 record
Leighton Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Leighton Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Leighton Group
What does Leighton Group do?
Verdantas is an integrated environmental science and engineering consulting firm that delivers professional services combining environmental science (assessment, remediation, health and safety, natural resources planning, sustainability advisory) with comprehensive engineering capabilities (architecture, automation, electrical, geotechnical, hydrology, mechanical, structural, surveying, water/wastewater systems). The firm solves complex challenges at the intersection of infrastructure and environment across markets including power, water, government, industrial, renewable energy, transportation, real estate, oil and gas, and technology.
Is Leighton Group a public or private company?
Leighton Group is a private company. It is classified as unknown and is currently operating.
When was Leighton Group founded?
Leighton Group was founded in 1961. It employs 101 to 250 people.
Where is Leighton Group based?
Leighton Group is headquartered in Irvine, United States, in the North America region.
How does Leighton Group make money?
One revenue line is on record: professional Engineering and Environmental Services.
Who are Leighton Group's main competitors?
Broad incumbents on record are AECOM, WSP Global and Jacobs Solutions. Direct peers are Haley & Aldrich, Stantec, Arcadis, Tetra Tech, Brown and Caldwell and ERM (Environmental Resources Management). Montrose Environmental Group is listed as an emerging player.
Does Leighton Group have an API?
No public API is recorded for Leighton Group.
What industry is Leighton Group in?
Leighton Group's product category is Environmental and Engineering Consulting Services. Its primary akta.pro industry code is BPAHAJAJ, Water, Wastewater & Stormwater Compliance, with a secondary code of BPAHAIAD, Water, Wastewater & Hydraulics Engineering Consulting. Its NAICS code is 54162 and its SIC code is 8711.