D'Appolonia

What D'Appolonia does

D'Appolonia Engineers is a private consulting engineering firm founded in 1956 by Dr. Elio D'Appolonia, a former Carnegie Institute of Technology (now Carnegie Mellon University) faculty member. Headquartered in Pittsburgh, Pennsylvania with 11–50 employees, the firm provides civil, environmental, and geotechnical engineering services, spanning geology, hydrology, and hydraulics, to industrial and governmental clients across nine vertical markets: industrial and commercial site development; dams and waterways; healthcare and education; recreation facilities; transportation and infrastructure; government (local, state, federal); mining; energy and utilities (natural gas, coal, nuclear, petroleum); and research and training.

The firm's technical differentiation rests on applied domain expertise rather than software platforms. Proprietary capabilities include geophysical methods for detecting underground mine workings, graves, and prehistoric sites using DC resistivity and electrical resistivity techniques; Load Resistance Factor Design (LRFD) training and specifications for bridge and geotechnical applications; innovative coal refuse disposal facility designs; dam breach analyses and FERC Part 12 inspections; and seismic design criteria for energy-sector impoundments. The firm has completed over 200 dam-related projects, served the energy industry for 50 years, and maintained consecutive on-call contracts with the City of Pittsburgh and Allegheny County for 20+ years.

D'Appolonia monetizes via project-based professional services fees, operating a sales-led direct-engagement model. Work spans planning through construction phases, leveraging long-term client relationships and high repeat business. Marketing is relationship-driven, executed through 13 professional engineering organization memberships, peer-reviewed technical publications, and industry conference participation rather than digital channels. The firm is privately held with no parent company, no disclosed institutional investors, no funding rounds, no M&A activity, and no disclosed leadership team beyond its founder, who maintained active affiliation until his passing in December 2015.

Name

D'Appolonia

Legal name

D'Appolonia Engineers

Website

https://dappolonia.com

Company type

Private

Founded year

1956

Operating status

Operating

Headcount range

11–50 employees

Short description

D'Appolonia Engineers is a Pittsburgh-based, privately held consulting engineering firm founded in 1956, providing civil, environmental, and geotechnical engineering services across nine vertical markets, including government, energy, mining, transportation, and industrial site development.

Ownership category

akta.pro rank

Product category

Civil Engineering Consulting Services

NAICS

Engineering Services (541330)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industries

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB), Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD), Transportation & Traffic Engineering Consulting (BPAHAIAC)

Keywords

• Geotechnical engineering consulting
• Civil engineering services
• Dam safety engineering
• Mining engineering consulting
• Environmental engineering services

Headquarters

HQ city

Pittsburgh

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: Project-based consulting fees for civil, geotechnical, and environmental engineering services provided to industrial and governmental clients. Services span from planning through construction phases.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

D'Appolonia provides project-based consulting engineering services spanning civil, geotechnical, environmental, geological, hydrologic, and hydraulic disciplines to industrial and governmental clients in the U.S. and internationally. Services are delivered from project planning through construction phases across market segments including dams and waterways, transportation and infrastructure, government infrastructure, mining, energy and utilities, industrial and commercial site development, healthcare and education, and recreation facilities.

Product overview

D'Appolonia is a consulting engineering firm founded in 1956, providing civil, environmental, and geotechnical engineering services. The company operates as a unified service provider rather than a software platform. Its core offerings span multiple market segments: Industrial & Commercial Site Development, Dams & Waterways Engineering, Healthcare and Education, Recreation Facilities, Transportation & Infrastructure, Government Services, Mining Industry Services, Energy & Utilities Engineering, and Research & Training Services. These services are supported by technical publications documenting engineering methodologies. The firm is headquartered in the Pittsburgh, PA area and serves clients in the U.S. and internationally.

Differentiator

Problem solved

Functional benefit

Products and services

• Industrial & Commercial Site Development Comprehensive engineering services for site development including site exploration, wetlands delineation, grading plans, stormwater management, erosion control, site utility design, and permitting for industrial and commercial clients.
• Dams & Waterways Engineering Dam and waterway engineering services including new dam design, dam rehabilitation, spillway design, dam inspections, dam breach analyses, and hydrologic and hydraulic evaluations, with over 200 dam-related projects completed.
• Healthcare and Education Engineering Civil and geotechnical engineering services for healthcare and educational facilities, including foundation design and stormwater system design for state-funded institutional projects.
• Recreation Facilities Engineering Engineering services for public recreational facilities including stormwater system design, site layout and grading, green space design, and retaining structure rehabilitation.
• Transportation & Infrastructure Engineering Transportation and infrastructure engineering including geotechnical and structural expertise for highways, bridges, tunnels, embankments, slopes, retaining walls, culverts, and pavements.
• Government Engineering Services Engineering consulting for local, state, and federal government agencies including geotechnical explorations, foundation design, landslide remediation, and hydrologic analyses, delivered through consecutive on-call contracts.
• Mining Industry Services Mining industry services including mine waste facility design, slurry impoundment design, impoundment risk assessments, mine subsidence analyses, and geophysical evaluations for coal mining operators.
• Energy & Utilities Engineering Engineering consulting for the energy industry including natural gas, coal, nuclear and petroleum sectors, covering project planning, civil design, seismic criteria, and power plant infrastructure.
• Research & Training Services Research and development projects advancing engineering state-of-practice, LRFD training courses, technical seminars, and instructional courses for professional development, presented more than 50 times to 35 state transportation agencies.

Quantifiable outcome

• LRFD training presented to 35 state transportation agencies over 50 times
• +2 more outcomes

Named customers11 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

13 partnerships are on record, tiered core and minor.

• American Council of Engineering Companies (ACEC)coreOthersOrganizational membership providing business operations improvement through peer review, project and quality practices training, and strategic planning programs.
• American Concrete Institute (ACI)coreOthersProfessional membership providing access to technical resources and standards development for concrete engineering practices.
• The International Association of Foundation Drilling (ADSC)coreOthersProfessional membership in foundation drilling industry association providing technical resources and career development opportunities.
• American Society of Civil Engineers (ASCE)coreOthersOrganizational membership providing access to technical resources, conferences, and peer-reviewed publications in civil engineering.
• Association of State Dam Safety Officials (ASDSO)coreOthersProfessional membership in dam safety organization providing technical resources and industry best practices for dam engineering.
• ASFE – The Geoprofessional Business Association (GBA)coreOthersOrganizational membership providing peer review, quality practices training, and business operations improvement programs.
• American Society for Testing and Materials (ASTM)coreOthersOrganizational membership providing access to standards development and technical resources for testing and materials evaluation.
• Deep Foundations Institute (DFI)coreOthersProfessional membership providing access to deep foundations technical resources, conferences, and industry best practices.
• Geo-Institute of ASCEcoreOthersProfessional membership in geotechnical engineering specialty organization providing technical resources and career development.
• National Ground Water Association (NGWA)minorOthersProfessional membership providing access to groundwater technical resources and industry information.
• Vistage, International Organization of CEOscoreOthersExecutive membership providing strategic planning resources and peer advisory for business leadership.
• Transportation Research Board (TRB)coreOthersOrganizational membership providing access to transportation research, technical resources, and national conference participation.
• United States Society on Dails (USSD)coreOthersProfessional membership in dam engineering society providing technical resources and best practices for dam design and rehabilitation.

Scale indicators6 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• AECOM: Global infrastructure consulting firm with major dam, water, transportation, and energy practices. Competes with D'Appolonia for large USACE, DOT, and energy-sector engineering contracts.
• Terracon: Large national geotechnical, environmental, and materials engineering firm serving government, transportation, and energy clients. Competes for similar on-call contracts but at significantly greater scale and geographic reach.
• WSP: Global engineering consultancy with deep water, dam, transportation, and energy infrastructure practices (now including Golder Associates). Competes for the same federal/state infrastructure contracts D'Appolonia serves, but at much larger scale.
• Arcadis: Global design and engineering consultancy with water, infrastructure, and environmental practices. Competes for federal/state engineering work similar to D'Appolonia's portfolio.
• Stantec: International engineering and environmental services firm with significant water resources, dam, geotechnical, and transportation infrastructure practices overlapping with D'Appolonia's markets.

Direct peers

• GeoEngineers: Geotechnical and environmental consulting firm offering dam, levee, transportation, and energy infrastructure services. Comparable boutique-scale specialty practice focused on subsurface engineering.
• Haley & Aldrich: Geotechnical and environmental engineering consulting firm serving infrastructure, energy, and government clients with subsurface, foundation, and dam-related services that overlap directly with D'Appolonia's core offerings.
• GAI Consultants: Engineering and environmental consulting firm with strong Pennsylvania presence offering geotechnical, water resources, transportation, and energy services directly comparable to D'Appolonia's regional practice.
• Schnabel Engineering: Geotechnical, dam, and tunneling engineering consulting firm with comparable dam safety, foundation design, and infrastructure practices. Closest direct peer in boutique-scale geotechnical/dam specialty work.
• Brierley Associates: Engineering firm specializing in tunnels, underground structures, and geotechnical engineering. Direct peer in foundation/earth retention design and underground infrastructure work.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Dappolonia1956

Revenue estimate

Valuation estimate

Number of profiles

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 D'Appolonia