What Shaft Drillers International does

Shaft Drillers International, LLC (SDI) is a privately held holding company headquartered in Mount Morris, Pennsylvania that operates a family of eight specialized construction, drilling and geotechnical services companies. Its portfolio spans dam construction and rehabilitation (ASI Construction, Heeter Geotechnical Construction), geotechnical construction (Coastal Drilling East, Ludwig Drilling), oil & gas well services and land drilling (Coastal Well Service, Highlands Drilling), mechanically excavated shafts (North American Drillers), and turnkey helical pile systems (TEK Piles). SDI targets government agencies, utilities, oil & gas operators, mining companies, and infrastructure developers across the United States and, through ASI and NAD, internationally.

The group's underlying technology base is mechanical and field-deployed rather than software-driven. It includes custom-built grout plants, custom drilling platforms, advanced air and fluid drilling techniques, and mechanical shaft excavation systems capable of producing shafts up to 20 feet in diameter and 2,000 feet deep. North American Drillers (NAD) positions itself as an international leader in blind bore and raise bore shaft development for ventilation, access, sewer, tunnel and raw water intake projects. Safety infrastructure — ISNetworld membership, SafeLandUSA and Veriforce credentialing, MSHA Part 48 & 77 training, OSHA 10/30, E-Verify, and an EMR rating below the national average — is used as a prequalification asset for regulated and government work.

SDI's business model is project-based and contract-driven, generating revenue through specialized construction contracts across heavy civil, mining, oil & gas, water resources and infrastructure end markets. Pricing is not publicly disclosed; prospective clients engage through the corporate office for project-specific quotes. GTM is enterprise and field-sales led, with no self-serve or product-led components. Quantified scale signals include 150+ dam projects (ASI), 2,500+ wells serviced (CWS), shaft capacity to 2,000 ft depth (NAD), and an 8-company operating footprint with bases in Pennsylvania, Colorado, the Appalachian Basin and select international markets.

Name

Shaft Drillers International

Legal name

Shaft Drillers International, LLC

Website

https://shaftdrillers.com

Company type

Private

Founded year

1934

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Shaft Drillers International is a privately held holding company operating eight specialty construction and drilling subsidiaries that deliver dam construction, geotechnical drilling, oil & gas well services, large-diameter shaft excavation and helical pile installation to government, utility, mining and infrastructure clients across the United States and internationally.

Ownership category

akta.pro rank

Product category

Specialized Construction and Drilling Services

NAICS

Support Activities for Mining (2131), Drilling Oil and Gas Wells (213111)

SIC

Oil & Gas Field Services, Nec (1389), Construction, Mining & Materials Handling Machinery & Equip (3530), Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Shaft Sinking, Raise Boring & Underground Development Works (IMAKAOAC)

akta.pro secondary industries

Exploration & Production Drilling Services (RC, Core, Directional, Sonic, Auger) (IMAKAKAB), Mine Construction & Development Contracting (Shaft Sinking, Tunneling, Pre-Strip, Civil Works) (IMAKAKAG)

Keywords

• Specialized construction services
• Dam construction remediation
• Geotechnical drilling services
• Deep shaft excavation
• Oil and gas well drilling

Headquarters

HQ city

Mount Morris

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Others

Revenue model

1. Specialized construction project contracts: SDI family companies generate revenue through project-based contracts for specialized construction services including dam construction/remediation, geotechnical drilling, shaft excavation, well drilling, and helical pile installation. These are primarily one-time, project-based commercial and government contracts.
2. Oil & gas well services: Coastal Well Service (CWS) provides oil & gas well services including well service, new hole drilling, site preparation, wireline services, and water hauling across the region. Highlands Drilling provides Marcellus & Utica well drilling and top hole drilling services in the Appalachian Basin.

Go-to-market motion2 records

Core offering

Shaft Drillers International (SDI) is a privately held holding company that operates a family of eight specialized construction companies delivering ground modification solutions and mechanically excavated shafts. Its portfolio delivers turnkey project-based services including dam construction and rehabilitation, geotechnical drilling, large-diameter mechanical shaft excavation (up to 20 feet in diameter and 2,000 feet deep), oil and gas well drilling and well services, and helical pile foundation systems for heavy civil, mining, water resources, oil and gas, and infrastructure clients.

Product overview

Shaft Drillers International (SDI) is not a single unified software product but rather a parent holding organization that operates a family of specialized construction, drilling, and geotechnical services companies. The portfolio consists of eight operating subsidiaries — ASI Construction LLC, Coastal Drilling East LLC (CDE), Coastal Well Service LLC (CWS), Heeter Geotechnical Construction LLC (HGC), Highlands Drilling, Ludwig Drilling LLC (LDW), North American Drillers LLC (NAD), and TEK Piles LLC — each functioning as an independent sub-brand delivering a distinct specialty service line (dam construction, geotechnical drilling, oil & gas well service, heavy civil work, land drilling, drilled shafts, shaft development, and helical piles respectively). In addition, SDI operates an internal Employee Self Service (ESS) Portal used by its workforce to access pay stubs and benefits.

Differentiator

Problem solved

Functional benefit

Brands

• ASI Construction LLC: Construction leader in the water resources industry; dam construction and remediation, design/build, underground construction, spillway and intake development.
• Coastal Drilling East, LLC (CDE)
• Coastal Well Service LLC (CWS)
• Heeter Geotechnical Construction, LLC (HGC)
• Highlands Drilling
• Ludwig Drilling LLC (LDW)
• North American Drillers LLC (NAD)
• TEK Piles LLC

Products and services

• ASI Construction LLC

Quantifiable outcome

• 150+ dam projects completed (35 new dams, 110 dam modification/remediation projects)
• +3 more outcomes

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

Scale indicators6 records

Recent moves5 records

Expansion highlights6 records

Broad incumbents

• Tutor Perini Corporation: Large heavy civil and specialty construction contractor with dam, tunneling, and infrastructure work. Overlaps with SDI's ASI/NAD in dam and shaft/tunnel projects but at materially larger scale and broader geography.
• APi Group: Global specialty services and solutions provider in safety, specialty, and industrial services. Comparable as a multi-subsidiary specialty services platform — similar 'family of businesses' structure to SDI though with different end-market exposure (fire/life safety vs. drilling/geotechnical).
• Granite Construction: Large public heavy civil contractor with material exposure to dams, water resources, and infrastructure. Overlaps with SDI's ASI and HGC in dam construction and heavy civil, but operates at significantly greater scale and breadth.

Direct peers

• Sterling Infrastructure: Specialty/heavy civil construction company with operations in foundations, heavy civil, and transportation infrastructure. Comparable to SDI's family-of-companies model with multiple operating subsidiaries delivering geotechnical, structural, and infrastructure services.
• Keller Group plc: Global geotechnical specialist (parent of Hayward Baker) offering ground engineering, foundation, and ground improvement services. Closest comparable to NAD, CDE, Ludwig Drilling, and TEK Piles for shaft, grouting, micropile, and helical pile work.
• Orion Group Holdings: Heavy civil and marine construction contractor serving infrastructure, marine, and energy markets. Comparable to SDI's mix of dam remediation (HGC/ASI), heavy civil earthwork, and exposure to oil & gas and water infrastructure projects.
• Matrix Service Company: Specialty contractor serving energy, power, and industrial infrastructure markets with construction and maintenance services. Comparable to SDI's project-based, contract-driven model across heavy industrial, energy, and infrastructure end markets.
• Boart Longyear: Global drilling services and equipment provider serving mining, energy, and infrastructure. Closest comparable to NAD (large-diameter shaft drilling), Highlands Drilling, and Ludwig Drilling in mechanical and rotary drilling capabilities.
• Primoris Services Corporation: Infrastructure and energy construction services company with operations spanning utilities, pipelines, and civil. Comparable to SDI's mix of oil & gas services (CWS/Highlands), civil/heavy construction, and specialty contracting.

Regional players

• MYR Group: Specialty construction services provider focused on electrical construction and transmission/distribution. Indirect peer to SDI in specialty contracting business model and project-based heavy industrial work, though serving different end markets (electrical vs. geotechnical/drilling).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/shaft-drillers-international

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries8 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 Shaft Drillers International