What Hillmann Consulting, LLC does

Hillmann Consulting, LLC is a privately held, family-controlled environmental and construction consulting firm founded in 1985 and headquartered in Union, New Jersey. The company delivers integrated professional services across five core lines — Environmental Health & Safety, Due Diligence & Remediation Management, Energy Consulting, Construction Services, and Lab Services — to commercial real estate owners, real estate developers, and lenders/financial institutions across 27 U.S. office locations. Its service portfolio includes Phase I/II Environmental Site Assessments, PFAS due diligence, property condition assessments, construction loan monitoring, energy audits and retro-commissioning, industrial hygiene, and disaster/emergency response, supported by an in-house AIHA LAP-accredited environmental laboratory (Lab ID #100162) staffed by six full-time analysts. Differentiated expertise includes multi-state regulatory compliance (EPA, OSHA, HUD, NYC Local Law 97, BERDO, LBER), tax credit advisory for affordable housing and historic projects, and C-PACE financing support.

The firm monetizes primarily through project-based, custom-quoted professional services engagements under multi-year contract cadences, with sales driven by a dedicated business development team and principal-level relationships. Go-to-market is sales-led and relationship-based, supported by content marketing, industry events, and a referral network that includes multi-decade enterprise clients such as Tishman Speyer (60MM+ SF over 35 years), Northrop Grumman, Fairfield Residential, and Carver Federal Savings Bank. Operations are organized through The Hillmann Family of Companies umbrella, which includes wholly-owned subsidiaries Hillmann Development Advisors (HDA) for development advisory and general contractor pre-development services, HK Engineering, and Abraxas Energy Consulting (acquired February 2024) for energy efficiency services. Hillmann is led by Founder & Chairman/CEO Chris Hillmann and President Matt Kamin, with recent (December 2025) formation of a Board of Directors signaling institutionalization of governance. The firm has earned four consecutive Zweig Group Hot Firm List honors (2021–2024) and multiple Great Place to Work recognitions.

Name

Hillmann Consulting, LLC

Legal name

Hillmann Consulting, LLC

Website

https://hillmannconsulting.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

101–250 employees

Short description

Hillmann Consulting is a privately held environmental and construction consulting firm founded in 1985 that delivers integrated environmental health & safety, due diligence, energy consulting, construction risk management, and accredited laboratory services to commercial real estate owners, developers, and lenders nationwide across 27 offices.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (54162), Environmental Consulting Services (541620), Management Consulting Services (54161)

SIC

Services-Management Consulting Services (8742), Services-Commercial Physical & Biological Research (8731), General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

All Appropriate Inquiries (AAI) & ASTM Phase I ESA (EUAHAEAA)

akta.pro secondary industries

Portfolio & Multi-Site Environmental Risk Screening (Desktop / Rapid Risk Assessments) (EUAHAEAK), Permitting, Siting & Environmental Impact (EIA/NEPA) Advisory (EUAMANAB), Incentives, Subsidies & Tax Policy (ITC/PTC, FiTs, Auctions/CfDs) (EUAMANAE), Insurance Replacement Cost & Damage/Loss Valuation (BPAJAKAL)

Keywords

• Environmental consulting services
• Construction risk management
• Environmental site assessment
• Property condition assessment
• Energy audit consulting

Headquarters

HQ city

Union

HQ country

United States

HQ region

North America

Offices28 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Environmental Health & Safety Consulting Services: Professional consulting services for building science, industrial hygiene, asbestos/lead/mold assessment, IAQ assessments, potable water sampling, Legionella testing, fire damage assessments, disaster/emergency response, risk management, and training.
2. Due Diligence & Remediation Management: Commercial real estate due diligence services including Phase I & II Environmental Site Assessments, PFAS due diligence, hazardous materials surveys, property condition assessments, seismic risk assessments, groundwater/soil testing, remediation design and management, and UST/AST decommissioning.
3. Energy Consulting Services: Energy audits, commissioning and retro-commissioning, measurement and verification services, energy management software, and energy ordinance compliance services. Expanded through acquisition of Abraxas Energy Consulting.
4. Construction Services: Construction risk management including loan monitoring, plan and cost reviews, property condition assessments, site observation reports, construction advisory, development management, site safety management, and C-PACE advisory services.
5. Laboratory Analytical Testing Services: In-house accredited laboratory providing analytical testing for environmental consultants and home inspectors, including asbestos analysis (PCM/TEM/PLM), mold testing, combustion by-products, Legionella, and water quality testing.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

Hillmann Consulting provides integrated environmental, due diligence, energy, and construction consulting services for real estate and built-environment clients nationwide. Core offerings cover Environmental Health & Safety (asbestos, lead, mold, IAQ, Legionella, industrial hygiene), Phase I/II Environmental Site Assessments and Property Condition Assessments, energy audits and commissioning/retro-commissioning, construction risk management and loan monitoring, and in-house accredited environmental laboratory testing. The firm is delivered through direct sales-led engagement across five service lines with multi-state NELAP/NVLAP-accredited lab capabilities.

Product overview

Hillmann Consulting, LLC is a consulting firm offering integrated services across the built environment. The company operates five core service lines: Environmental Health & Safety Services (building science, industrial hygiene), Due Diligence & Remediation Management (Phase I/II ESAs, PFAS due diligence), Energy Consulting (audits, commissioning, M&V), Construction Services (risk management, advisory, site safety), and Lab Services (accredited environmental testing). The firm expanded through acquisition of Abraxas Energy Consulting (2024), which provides energy auditing and software tools. Two subsidiaries serve specialized needs: Hillmann Development Advisors (HDA) for development management and advisory services, and HK Engineering. The HHIIP program offers specialized indoor air quality assessment for building owners. The company operates under The Hillmann Family of Companies umbrella, providing nationwide coverage from 27 locations.

Differentiator

Problem solved

Functional benefit

Brands

• Hillmann Development Advisors (HDA): Real estate development advisory services, construction and environmental advisory, spanning ground-up construction to adaptive reuse project types. Performs environmental, remediation, and demolition services as a General Contractor during pre-development.
• HK Engineering
• Abraxas Energy Consulting

Products and services

• Environmental Health & Safety Services Building Science and Industrial Hygiene consulting covering asbestos, lead and mold assessment, IAQ and odor assessments, potable water sampling, Legionella testing, fire and smoke damage assessments, illicit drug testing and decontamination, disaster and emergency response, risk management, occupational safety training, and industrial hygiene for real estate, institutional, and industrial clients.
• Due Diligence & Remediation Management Commercial real estate due diligence and remediation services including Phase I and II Environmental Site Assessments, PFAS due diligence, HUD Part 50/58 and CEQR/SEQR environmental assessments, third-party desktop reviews, hazardous materials surveys, Property Condition Assessments (PCA), Seismic Risk Assessments (PML), groundwater and soil testing and delineation, radon testing, remediation design and management, and UST/AST decommissioning and compliance.
• Energy Consulting Energy consulting services including energy audits and consulting, commissioning (Cx) and retro-commissioning (RCx), measurement and verification (M&V) services, energy management and assessment software, and energy ordinance compliance for building owners seeking efficiency, code compliance, and Inflation Reduction Act/tax credit incentive capture.
• Construction Services Construction consulting tailored to real estate and development clients, covering Construction Risk Management, Construction Advisory, Construction Site Safety, and Development Management for lenders, developers, and property owners.
• Lab Services Fully AIHA LAP, LLC accredited in-house environmental laboratory (Lab ID #100162) providing analytical testing for asbestos (PLM, PCM, TEM), mold, combustion by-products, nuisance dust, Legionella, sewage, and total coliform/E. coli for environmental consultants and home inspectors. Staffed by six full-time analysts and an administrative team.
• Hillmann Development Advisors (HDA) Wholly-owned subsidiary of Hillmann Consulting partnering with property owners, developers, and investors to devise and execute real estate development strategies. Performs environmental, remediation, and demolition services as a General Contractor during pre-development, spanning ground-up construction to adaptive reuse project types.
• Hillmann Healthy Indoor Initiative Program (HHIIP) Proactive indoor air quality program assessing HVAC systems, mold and moisture control, COVID-19 protocols, and water quality to help building owners demonstrate commitment to occupant health and safety.

Quantifiable outcome

• Served over 60MM SF of commercial office space for single client relationship (Tishman Speyer)
• +1 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Abraxas Energy Consulting, LLCcoreStrategic or Co-development Partner · 1 February 2024Hillmann acquired Abraxas Energy Consulting in February 2024 as a strategic expansion into energy efficiency and consulting services. Abraxas provides energy assessments, commissioning, retro-commissioning, measurement and verification, and energy management software. The acquisition strengthens Hillmann's ability to serve building owners with energy efficiency and sustainability needs while expanding the client's access to funding sources including the Inflation Reduction Act, tax credits, grants, and state/local incentives.

Scale indicators7 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Partner Engineering and Science: Partner Engineering and Science is a national environmental, engineering, and due diligence consulting firm serving commercial real estate with Phase I/II ESAs, PCAs, and construction risk management services, directly competing with Hillmann's core due diligence and construction services practice.
• EBI Consulting: EBI Consulting provides environmental, building science, and energy services for commercial real estate, including environmental due diligence, industrial hygiene, and energy consulting, directly overlapping with Hillmann's EH&S, due diligence, and energy consulting service lines.
• Terracon: Terracon is a large U.S. environmental, geotechnical, and materials engineering consultancy offering Phase I/II ESAs, remediation, and construction materials testing, competing head-to-head with Hillmann's environmental due diligence and construction services work for CRE clients.
• Trinity Consultants: Trinity Consultants is an environmental and safety consulting firm specializing in EHS compliance, permitting, and industrial hygiene services, directly comparable to Hillmann's environmental health & safety and regulatory compliance offerings.
• Roux Associates: Roux Associates is an environmental consulting and engineering firm focused on site investigation, remediation, and environmental due diligence for real estate and industrial clients, directly comparable to Hillmann's due diligence and remediation management practice.

Broad incumbents

• Stantec: Stantec is a global engineering, architecture, and environmental consulting firm offering environmental site assessments, building sciences, and energy services as part of a much broader portfolio, competing with Hillmann on enterprise environmental and energy engagements.
• AECOM: AECOM is a global infrastructure consulting firm with large-scale environmental services, due diligence, and construction management capabilities, serving as a broad incumbent competitor to Hillmann on large multi-discipline commercial real estate programs.
• WSP: WSP is a global professional services firm with substantial environmental, building sciences, and energy consulting practices, operating as a broad incumbent competitor on enterprise engagements that overlap with Hillmann's EH&S, due diligence, and energy service lines.
• Jacobs Solutions: Jacobs is a large global consulting and engineering firm offering environmental site assessment, remediation, and compliance services within a much broader portfolio, competing with Hillmann on enterprise environmental and infrastructure engagements.

Emerging players

• Verdantas: Verdantas is an emerging environmental consulting and engineering platform built through roll-up acquisitions, offering environmental due diligence, permitting, and sustainability services comparable to Hillmann's core practice, with similar growth-stage dynamics and M&A appetite.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hillmann-consulting-llc
• Xx.com/hillmanngroup
• Facebookfacebook.com/hillmannconsulting

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Hillmann Consulting, LLC