What HMMH does

HMMH (Harris Miller Miller & Hanson Inc.) is a privately held environmental and transportation planning consulting firm founded in 1981 as a spin-off from Bolt Beranek and Newman (BBN) by Andrew Harris, Nicholas Miller, Robert Miller, and Carl Hanson. Headquartered in Burlington, Massachusetts, the firm provides noise and vibration assessment, air quality analysis, and airport and airspace planning services across seven U.S. offices spanning Burlington, Anaheim, Washington DC, New York City, Dallas, Herndon, and San Diego. Its core technology combines federal-standard modeling tools (FAA AEDT, FHWA Traffic Noise Model) with three registered proprietary platforms, InFLIGHT™ for aviation environmental analysis, RealContours™ for noise contour modeling, and SoGlare™ for solar glare analysis, the last of which supports renewable-energy siting decisions near airports.

HMMH generates revenue exclusively through professional consulting engagements delivered to federal agencies (FAA, FHWA, FTA, FRA, NASA, DoD), state departments of transportation, airport authorities, and private engineering firms under competitive contracts, on-call agreements, and long-term client relationships. The firm authored foundational federal acoustic guidance, including the FHWA Traffic Noise Model and its Supplemental Guidance Report 791, the FTA Transit Noise and Vibration Impact Assessment Manual, and the FRA CREATE Freight Noise and Vibration Model. Service lines span aviation, highway and surface transportation, rail and transit, federal programs, construction and architecture, parks and recreation, and a newer sustainability and energy practice that wraps greenhouse gas accounting and climate resilience around the core acoustics offering.

The firm is led by President and CEO Diana B. Wasiuk, appointed July 2022 after the retirement of ~38-year veteran Mary Ellen Eagan. Customers include Massport (30+ years), Louisville Regional Airport Authority, NYSDOT, VDOT, MassDOT, JPDO, Stantec, Maryland Aviation Administration, San Diego Regional Airport Authority, SFO, and JFK, with Boston Business Journal recognition in 2021 as a Fast 50 company and among the Top 25 Largest Women-Owned Massachusetts businesses.

Name

HMMH

Legal name

Harris Miller Miller & Hanson Inc.

Website

https://hmmh.com

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

11–50 employees

Short description

HMMH is a privately held, 40+ year-old U.S. environmental and transportation planning consulting firm specializing in noise and vibration assessment, airport and airspace planning, and air quality analysis for federal agencies, state DOTs, and airport authorities, with proprietary FAA-grade modeling software.

Ownership category

akta.pro rank

Headquarters

HQ city

Burlington

HQ country

United States

HQ region

North America

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Revenue model

1. Environmental Consulting Services: HMMH generates revenue through professional consulting engagements on environmental and transportation planning projects. Services are provided to government agencies (federal, state, local) and private sector clients on a project fee basis, typically through competitive contracts, on-call consulting agreements, and long-term client relationships.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

HMMH provides environmental and transportation planning consulting services with a core focus on noise and vibration assessment, modeling, measurement, and mitigation for aviation, highway, rail, transit, federal, and construction projects. The firm also delivers air quality analysis, sustainability and energy consulting, and specialized support for advanced air mobility, supported by proprietary software tools and an annual virtual training course.

Product overview

HMMH provides environmental and transportation planning consulting services organized around core noise and vibration consulting capabilities across multiple markets including aviation, highway, rail/transit, construction/architecture, federal programs, parks/recreation, and sustainability/energy. The portfolio centers on noise assessment and mitigation services supplemented by proprietary software tools (InFLIGHT™, RealContours™, SoGlare™), air quality analysis services, and professional training offerings (Virtual Airport Noise Course). Advanced Air Mobility consulting represents a newer service line addressing emerging UAM/eVTOL needs. The company operates as a professional services firm rather than a software product company, with services delivered through consultant engagements across multiple industry sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Aviation Environmental and Planning Services Full-service environmental and sustainability planning for commercial and general aviation airports, including noise abatement, mitigation studies, FAA Part 150 noise compatibility programs, sound insulation programs, airspace planning, and community noise forum support.
• Highway Noise Control and Environmental Studies Highway noise analysis, noise barrier design, environmental assessments, quieter pavement evaluation, On-Board Sound Intensity (OBSI) testing, and air quality assessment for state departments of transportation and highway projects.
• Rail and Transit Noise and Vibration Solutions Noise and vibration assessments, mitigation recommendations, environmental analysis, and transit planning for commuter rail, freight rail, light rail, high-speed rail, and bus rapid transit projects.
• Federal Programs Consulting Specialized technical consulting for federal agencies covering military and civil aviation operations evaluation, AICUZ studies, JLUS programs, NEPA analyses, airspace planning, and installation reorientation and beddown procedures.
• Noise and Vibration Consulting Services Core cross-sector consulting service providing noise and vibration assessment, measurement, modeling, and mitigation recommendations for transportation and infrastructure projects across aviation, highway, rail, and construction sectors.
• Air Quality Analysis Services Mobile source air quality assessment, greenhouse gas analyses, air dispersion modeling, emissions inventory, and microscale/mesoscale analyses for transportation and infrastructure projects.
• Advanced Air Mobility Consulting Urban Air Mobility (UAM) and Advanced Air Mobility (AAM) consulting including e-VTOL aircraft noise assessment, community acceptance strategies, and integration with existing aviation systems.
• Acoustical Design and Performance Services Acoustical design guidance, noise ordinance compliance, abatement recommendations, and construction noise and vibration monitoring for developers, architects, and construction firms.
• Parks and Recreation Noise Consulting Noise analysis for theme parks, racetracks, stadiums, outdoor amphitheaters, and National Park Service projects including community impact assessment and natural soundscape preservation.
• Sustainability and Energy Consulting Sustainability planning, greenhouse gas accounting, renewable energy project assessments, solar glare analysis, and infrastructure climate resilience analysis for transportation and aviation clients.
• Virtual Airport Noise Course Annual virtual training course covering environmental acoustics, FAA regulations, noise modeling, measurement, and mitigation strategies for aviation professionals.

Quantifiable outcome

• Hundreds of miles of uniquely designed noise barriers implemented through HMMH-led mitigation studies
• +1 more outcomes

Named customers12 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Ten partnerships are on record, tiered minor and core.

• Canadian Advanced Air Mobility Consortium (CAAM)minorStrategic or Co-development Partner · 28 October 2020HMMH joined the launch of the Canadian Advanced Air Mobility Consortium to support the development of advanced air mobility in Canada.
• Federal Aviation Administration (FAA)coreStrategic or Co-development PartnerHMMH has a long-standing relationship with FAA providing technical consulting on national aircraft noise and annoyance programs, FAA Sound Insulation Policy Research, and involvement in the single largest aircraft noise research project. Also supports FAA's Center of Excellence for Alternative Jet Fuels and Environment (ASCENT).
• Federal Highway Administration (FHWA)coreStrategic or Co-development PartnerHMMH developed the Traffic Noise Model (TNM) for FHWA, including all acoustical algorithms and software, and wrote the original technical manual and Supplemental Guidance Report 791.
• Federal Transit Administration (FTA)coreStrategic or Co-development PartnerFTA relied on HMMH to develop the Transit Noise and Vibration Impact Assessment Manual, a key guidance document for transit projects.
• Federal Railroad Administration (FRA)coreStrategic or Co-development PartnerFRA relied on HMMH to develop the CREATE Freight Noise and Vibration Model and the High-Speed Ground Transportation Noise and Vibration Impact Assessment Manual. Also supported FRA in noise assessments for the 'Use of Locomotive Horns at Highway Rail Grade Crossings' final rule.
• NASAcoreStrategic or Co-development PartnerHMMH was tapped for a NASA contract to develop an advanced air mobility community integration platform. Also awarded the X-59 Quiet Supersonic Flight Community Testing Contract and contributes to NASA UAM Noise Working Groups.
• National Academy of Sciences - Cooperative Research Programs (ACRP)coreStrategic or Co-development PartnerHMMH conducts research directly for ACRP, developing guidance documents such as the Guidebook for Developing a Zero- or Low-Emissions Roadmap at Airports and numerous other research reports.
• Department of Defense (Various Installations)coreStrategic or Co-development PartnerHMMH provides AICUZ (Air Installation Compatible Use Zone) services, noise modeling, and environmental analysis for military installations including Homestead Air Reserve Base, Grand Forks AFB, Malmstrom AFB, and others.
• StantecminorStrategic or Co-development PartnerProject collaboration with Stantec on transportation projects, with testimonial noting HMMH's understanding of state and federal requirements as 'gold standard in their field.'
• State Departments of TransportationcoreStrategic or Co-development PartnerPartnerships with state DOTs including NYSDOT, VDOT, MassDOT, NHDOT, and others for highway noise studies, environmental assessments, and infrastructure projects.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Landrum & Brown: Landrum & Brown is a specialized aviation planning and environmental consulting firm focused on airport master planning, noise compatibility studies, and Part 150 programs — directly comparable to HMMH's core Aviation Environmental practice and competing for the same FAA, airport authority, and state DOT engagements.
• Ricondo & Associates: Ricondo provides airport planning, environmental, and financial advisory services to airports worldwide with deep FAA expertise. It overlaps directly with HMMH on airport master planning, noise studies, airspace analysis, and environmental documentation for major US airports.
• Mead & Hunt: Mead & Hunt is an employee-owned engineering and architecture firm with a dedicated aviation planning group offering airport master plans, environmental assessments, and noise studies — directly comparable to HMMH's aviation practice and competing for the same regional and mid-sized airport clients.
• Resource Systems Group (RSG): RSG is a transportation and environmental consulting firm with strong noise, air quality, and travel demand modeling practices serving DOTs, MPOs, and airports. It competes for the same highway noise, air quality, and FAA-related environmental work and shares HMMH's profile as a mid-sized specialty firm.
• Cross-Spectrum Acoustics: Cross-Spectrum Acoustics is a smaller acoustics and noise consulting firm providing measurement, modeling, and mitigation services to transit, construction, and industrial clients. It is comparable to HMMH as a niche noise consulting competitor, though with a narrower modal focus and smaller footprint.

Broad incumbents

• WSP USA: WSP is a global engineering consultancy with a major US transportation and environmental practice that competes for highway noise, transit, and NEPA work alongside HMMH, while also offering much broader engineering capabilities that make it a viable substitute for HMMH on multi-disciplinary bids.
• Stantec: Stantec is a global engineering, environmental, and project management firm and a current HMMH project collaborator. It is comparable both as a partner on joint pursuits and as a competitor pursuing the same airport, highway, and transit environmental work that HMMH primes.
• AECOM: AECOM is a global infrastructure consulting firm with substantial FAA, FHWA, and transit agency relationships in noise/vibration, environmental, and airport planning. Its full-service delivery model competes for the same government contracts and increasingly bundles acoustics into broader program wins.
• Kimley-Horn: Kimley-Horn is a large US engineering firm with strong aviation and surface transportation practices. It pursues the same state DOT, airport, and federal environmental work as HMMH, particularly highway noise, NEPA documentation, and airport master planning.
• Tetra Tech: Tetra Tech is a global environmental and engineering consulting firm with deep FAA, FHWA, and DoD experience in NEPA, air quality, noise, and water resources — overlapping with HMMH on federal environmental and transportation contracts at significantly greater scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/hmmhinc
• LinkedInlinkedin.com/company/harris-miller-miller-&-hanson-inc.?trk=nav_account_sub_nav_company_admin

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about HMMH