Public engineering firm directory

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ABD Engineering & Design

Grand Rapids, MI

Acoustics, noise, vibration & audio-visual systems

Website2 officesFounded 1962Updated Jun 2026

Service detail: Architectural Acoustics

Service: Architectural AcousticsService: Acoustical DesignService: Acoustical EngineeringIndustry: AgricultureIndustry: Arts & CultureType: Acoustic Consulting+20 more

AKRF

AKRF is a multidisciplinary consulting and engineering firm with more than 400 employees across 16 offices and remote locations nationwide. It provides integrated environmental, planning, engineering, and technical services to clients in land development, transportation, energy, and water sectors. AKRF's expertise spans environmental impact assessment, civil engineering, traffic and transportation planning, acoustics, geotechnical engineering, water resources, site remediation, landscape architecture, and climate resilience and adaptation.

Website8 leadersSize Estimate: 400 employeesUpdated Jun 2026

Service detail: Environmental Services

Service: Environmental ServicesService: Environmental Impact AssessmentService: Air QualityIndustry: Land DevelopmentIndustry: TransportationType: Civil Engineering+50 more

ALFA & OMEGA Solutions, LLC

Alvin, TX

Advanced Engineering and IT Services

WebsitePhone1 office1 leaders8 credentialsUpdated Jun 2026

Service detail: Industrial Production and Process Support

Service: Industrial Production and Process SupportService: Industrial ManagementService: Production SystemsIndustry: IndustrialIndustry: ManufacturingType: Industrial Engineering+33 more

Acoustical Analysis Associates Inc

Moorpark, CA

Acoustical consulting services for transportation, aviation, and community noise

WebsitePhone1 office5 projects1 leadersFounded 1987Updated Jun 2026

Project: Los Angeles-Pasadena Light Rail Transit Corridor EIR

Service: Aircraft Noise ConsultingService: Noise Certification to CFR Part 36 and ICAO Annex 16Service: No Acoustical Change EvaluationsIndustry: TransportationIndustry: AviationType: Acoustic Consulting+9 more

Acoustical Engineering Consultants

Elk Grove, CA

Engineering a quieter world and optimizing aural environments, one project at a time.

WebsitePhone2 offices8 projects2 leaders4 credentialsFounded 2008

Project: CalSTRS Headquarters 2.0

Service: Architectural AcousticsService: Room Acoustics Measurement and AnalysisService: Reverberation and Diffusion EngineeringIndustry: EducationIndustry: HealthcareType: Acoustic Consulting+36 more

Acoustical Systems Inc

Dayton, OH

More Than 45 Years Experience in Noise Control

WebsitePhone1 office3 credentialsFounded 1977Updated Jun 2026

Service detail: Acoustical Consulting and Engineering

Service: Acoustical Consulting and EngineeringService: Architectural Acoustics ConsultingService: Acoustical Engineering Feasibility StudiesIndustry: CommercialIndustry: IndustrialType: Acoustic Consulting+16 more

Advanced Numerical Solutions LLC

Advanced Numerical Solutions LLC provides specialized numerical modeling and simulation services, with expertise in finite element and boundary element methods, contact mechanics, gear contact analysis, and acoustics. It develops proprietary numerical codes and delivers engineering consulting services for clients requiring advanced computational analysis.

WebsiteUpdated Jun 2026

Service detail: Custom Numerical Modeling

Service: Custom Numerical ModelingService: Develops Bespoke MathematicalService: Computational Models Tailored To Specific Physical SystemsIndustry: IndustrialType: Mechanical Engineering+23 more

American Engineering Group LLC

Akron, OH

Fast-Track Your Product From Concept To Reality

WebsitePhone1 office5 projects11 credentialsUpdated Jun 2026

Project: Pressure Zero Tire Development

Service: Product Design & DevelopmentService: Product ideation and concept testingService: Industrial product designIndustry: DefenseIndustry: HealthcareType: Mechanical Engineering+35 more

Arpeggio LLC

Atlanta, GA

Acoustic Consulting & Audiovisual Technology Design

Website3 offices14 projects2 credentialsFounded 2000Size Estimate: 10-49 employeesUpdated Jun 2026

Project: Coffee High School Performing Arts Center

Service: Acoustics & Noise ControlService: Room Acoustics & ReverberationService: Sounds Isolation & PrivacyIndustry: CommercialIndustry: ResidentialType: Acoustic Consulting+17 more

Arup

We shape a better world

Website19 projects6 leadersUpdated Jun 2026

Project: LGA Delta Terminal C

Service: TransportationService: Airport Design and InfrastructureService: Airport PlanningIndustry: Arts & CultureIndustry: AviationType: Architecture & Engineering+47 more

Big Sky Acoustics

Helena, MT

Acoustical Design and Noise Control

WebsitePhone1 office1 projects2 leadersFounded 1999Updated Jun 2026

Project: Butte High School Auditorium

Service: Architectural AcousticsService: Architectural Acoustical DesignService: HIPAA Acoustical ComplianceIndustry: Arts & CultureIndustry: CommercialType: Acoustic Consulting+24 more

Blue Ridge Research and Consulting, LLC

Asheville, NC

Acoustical engineering and research solutions for defense, aerospace, and aviation programs

WebsitePhone1 office10 leadersFounded 2006Updated Jun 2026

Service detail: Noise Measurement & supporting detail Characterization

Service: Noise Measurement & supporting detail CharacterizationService: Aircraft and Jet Noise MeasurementsService: Rocket and Spacecraft Launch MeasurementsIndustry: DefenseIndustry: AerospaceType: Acoustic Consulting+30 more

Cerjan Acoustics

Westminster, CO

Industrial Noise & Vibration Solutions: Expert Acoustic Consultation

WebsitePhone2 offices2 leaders2 credentialsFounded 2017Size Estimate: 1-9 employees

Service detail: Noise Measurements

Service: Noise MeasurementsService: Short and Long-Term MonitoringService: System Level DefinitionIndustry: Renewable EnergyIndustry: MiningType: Acoustic Consulting+25 more

Chestnut Key Enterprises LLC

Rochester Hills, MI

Engineered Noise & Vibration Control. Measured Results.

WebsitePhone1 office3 projects8 leadersFounded 2001Size Estimate: 1-9 employees

Project: MIT W1 Building Renovation

Service: Acoustic Consulting & DesignService: Architectural Acoustic Design AssistService: Engineering Analysis & Acoustic DesignIndustry: CommercialIndustry: IndustrialType: Acoustic Consulting+26 more

Coffman Engineers

Anchorage, AK

The Right Team Matters

WebsitePhone23 offices8 projectsFounded 1982Updated Jun 2026

Project: 100 MW Hydrogen Production Plant

Service: Civil EngineeringService: Bridge EngineeringService: Land SurveyingIndustry: CommercialIndustry: RetailType: Civil Engineering+59 more

D.L. Adams Associates

Denver, CO

Sound is Our Business

WebsitePhone3 offices7 projects5 leaders3 credentialsFounded 1979

Project: Waukee Performing Arts Center

Service: Acoustical ConsultingService: Architectural AcousticsService: Performing Arts AcousticsIndustry: Arts & CultureIndustry: CommercialType: Acoustic Consulting+37 more

Delta G Consulting Engineers, Inc.

Fort Lauderdale, FL

Full-service consulting engineering practice specializing in MEP, fire protection, and LEED-certified designs.

WebsitePhone2 offices2 leaders2 credentialsFounded 1992Size Estimate: 10-49 employees

Service detail: Heating, Ventilation, and Air Conditioning (HVAC)

Service: Heating, Ventilation, and Air Conditioning (HVAC)Service: Chilled Water and Condenser Water SystemsService: Constant Volume Air HandlingIndustry: HealthcareIndustry: AirportsType: MEP+99 more

EEA Consulting Engineers

Austin, TX

Thoughtful Engineering. Shared Success.

WebsitePhone3 offices18 leaders4 credentialsFounded 1977Updated Jun 2026

Service detail: MEP Engineering

Service: MEP EngineeringService: Mechanical EngineeringService: Electrical EngineeringIndustry: HealthcareIndustry: EducationType: MEP+35 more

Epsilon Associates, Inc.

Maynard, MA

Expertly Navigating the Regulatory Process for Project Success

WebsitePhone2 offices2 leadersFounded 1997Updated Jun 2026

Service detail: Acoustics & Noise

Service: Acoustics & NoiseService: Noise Control EvaluationsService: Sound Level AnalysesIndustry: Power GenerationIndustry: Renewable EnergyType: Environmental Engineering+43 more

Greeneridge Sciences, Inc.

Santa Barbara, CA

Acoustics Research and Monitoring

WebsitePhone3 offices1 credentialsSize Estimate: 1-25 employeesUpdated Jun 2026

Service detail: Underwater Acoustic Monitoring

Service: Underwater Acoustic MonitoringService: Acoustic Impact ReportingService: Instrument Design & DevelopmentIndustry: MarineIndustry: Research FacilitiesType: Acoustic Consulting+3 more

Henderson Engineers

Lenexa, KS

Henderson Engineers is a national building systems engineering design and facility consulting firm headquartered in Lenexa, Kansas, with 15 offices across the United States. Its team of more than 1,000 engineers provides mechanical, electrical, plumbing, fire and life safety, refrigeration, telecommunications, security, acoustics, and commissioning services for retail, healthcare, commercial, grocery and distribution, sports venue, and data center markets.

Website15 offices4 leaders2 credentials2 publicationsSize Estimate: 1,000 employeesUpdated Jun 2026

Service detail: Mechanical Engineering

Service: Mechanical EngineeringService: HVAC SystemsService: Air DistributionIndustry: CommercialIndustry: RetailType: MEP+29 more

Image Acoustics, Inc.

Newport, RI

Research and Development in Acoustics

WebsitePhone2 offices3 leaders2 credentials6 publicationsFounded 1974

Service detail: Acoustical Engineering Research & Development

Service: Acoustical Engineering Research & DevelopmentService: Very Low Frequency TransducersService: Wideband TransducersIndustry: DefenseIndustry: GovernmentType: Acoustic Consulting+13 more

LLI Engineering, Inc.

Pittsburgh, PA

Innovative Solutions in Architecture & Engineering Since 1910

WebsitePhone1 office12 projects9 leaders4 credentialsFounded 1910

Project: Pittsburgh International Airport Microgrid

Service: Electrical EngineeringService: Power Distribution SystemsService: Standby Generation and MicrogridsIndustry: CommercialIndustry: HealthcareType: MEP+39 more

Lewis S. Goodfriend & Associates

Chester, NJ

Lewis S. Goodfriend & Associates is a diversified acoustical engineering and consulting firm with over 70 years of experience. LSG&A provides professional services for the acoustical design of interior spaces, evaluation and control of noise from mechanical equipment, noise impact assessments for commercial, industrial, and power generation facilities, OSHA noise exposure studies, sound and impact isolation design and testing, and expert witness testimony at legal proceedings and before municipal boards.

WebsitePhone2 offices3 leaders3 credentialsFounded 1953Updated Jun 2026

Service detail: Room Acoustics

Service: Room AcousticsService: Noise and Vibration ControlService: OSHA Noise Exposure StudiesIndustry: CommercialIndustry: IndustrialType: Acoustic Consulting+11 more