What Diamond Companies does

Diamond Companies, legally Diamond Drilling & Sawing Company, Inc. (DDSC), is a privately held specialty concrete services contractor founded in 1959 and headquartered at 1157 S Bannock St, Denver, Colorado. The company provides sawing, drilling, demolition, and ancillary concrete services — including slab sawing, wall sawing, core drilling, wire sawing, structural and bridge demolition, GPR-based locates and testing, concrete rehab and repair, surface preparation and grinding, terrazzo/epoxy/polished flooring (via its Diamond Terrazzo sub-brand and a Mapei partnership), earthwork and excavation, concrete and asphalt pourback, and trucking/hauling. Operations are powered by a fleet of 40+ completely self-contained trucks equipped with generators, hydraulic power units, heated boxes, water tanks, pumps, lift gates, vacuum systems, and GPR scanning technology, supported by 4 full-time mechanics and in-house operator training.

The company's revenue model is project-based professional services, with quote-driven pricing tied to scope, material, access conditions, and timeline. Go-to-market is direct B2B field sales targeting construction contractors, state DOTs, airports, defense contractors, healthcare and educational institutions, and commercial/industrial property owners; sales involvement begins at the pre-construction and bidding stage. Named customers include major general contractors (Kiewit, Hensel Phelps, Mortenson, Flatiron, Granite, GE Johnson, Saunders, Brinkmann), Colorado DOT, airports (DEN, DFW, Hartsfield-Jackson Atlanta), defense/aerospace (Lockheed Martin, Boeing), and industrial clients (Coors). Service area spans 10 U.S. states (Colorado, Georgia, Idaho, Kansas, Montana, Nebraska, North Carolina, Texas, Utah, Wyoming) with headquarters-anchored nationwide capability.

The business is led by President & CEO Matt Wiersma (joined 2014 as CFO, CEO since 2016) and VP/Treasurer/Chairman Henk Dykhouse (owner since 1990), under a locally-owned, non-PE-backed ownership structure. The company differentiates on safety (EMR 0.87 versus industry benchmark 1.0, ABC Gold STEP every year since 2003, Platinum STEP, 25+ total industry awards), tenure (15-20+ year operators, 130+ combined years of experience), and scale (largest sawing and drilling fleet in the Rocky Mountain region, 1,000+ clients, 10,000+ projects).

Name

Diamond Companies

Legal name

Diamond Drilling & Sawing Company, Inc.

Website

https://diamond-co.com

Company type

Private

Founded year

1959

Operating status

Operating

Headcount range

51–100 employees

Short description

Diamond Companies (Diamond Drilling & Sawing Company) is a Denver-based specialty concrete contractor providing sawing, drilling, demolition, GPR scanning, and concrete rehab services to contractors, state DOTs, airports, and defense and industrial clients across 10 U.S. states since 1959.

Ownership category

akta.pro rank

Product category

Concrete Construction Services

NAICS

Site Preparation Contractors (23891), Specialty Trade Contractors (238)

SIC

Construction - Special Trade Contractors (1700), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Exploration & Resource Development (Critical Minerals) (IMAKAFAL)

akta.pro secondary industries

Construction & Renovation Debris Removal (Outdoor Projects) (HSAIAOAD), Rock Excavation, Blasting & Quarry-Assist Works (IMAFAKAE)

Keywords

• Concrete cutting services
• Concrete demolition services
• Core drilling services
• Ground penetrating radar scanning
• Concrete surface preparation

Headquarters

HQ city

Denver

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Concrete Cutting & Drilling Services: Core service revenue from concrete sawing, drilling, wall cutting, wire sawing, core drilling, and hand/ring sawing services. Services provided to construction contractors, municipalities, and property owners for commercial, industrial, and infrastructure projects.
2. Demolition Services: Structural demolition, bridge demolition, selective surgical demolition, breaking and munching, picking and craning. Full or partial demolition services where concrete sawing is the safest and best option for removal.
3. Locates & Testing Services: GPR scanning, concrete testing (cure/PSI/break testing), soil testing, mold/asbestos/lead testing services as part of full-service offerings.
4. Concrete Rehab & Repair: Crack sealing, joint sealing, spall repair, patching, curing hardeners, floor maintenance, slab leveling, dustproofing and sealing services.
5. Surface Prep & Grinding: Shot blasting, grinding, scarifying, floor shaving, polishing, and removal services for concrete surface preparation.
6. Terrazzo, Epoxy & Polish: Custom flooring design, concrete polishing, epoxy flooring, and terrazzo flooring installation services.
7. Earthwork & Excavation: Site clear, soil disposal or remediation, trench digging services as part of full-service concrete solutions.
8. Concrete & Asphalt: New concrete slabs, patios, garages, sidewalks, curbs, gutters, and trench removal and pourback services.
9. Trucking & Hauling: Transportation of equipment, material delivery, demolition cleanup, hauling soil, concrete, rebar using fleet of flatbed and dumping trucks and trailers.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Diamond Companies is a full-service concrete construction services provider delivering concrete sawing (slab, wall, wire, hand, chain sawing), core drilling, structural and selective demolition, bridge demolition, airfield/runway sawing, GPR scanning and concrete testing, surface preparation and grinding, terrazzo/epoxy/polished flooring, earthwork and excavation, new concrete/asphalt placement, and trucking/hauling. Services are delivered via a fleet of 40+ self-contained trucks with in-house trained operators and 24/7 availability to construction contractors, municipalities, state DOTs, airports, and property owners across Colorado and nationwide.

Product overview

Diamond Companies (operating as Diamond Drilling & Sawing Company, Inc.) is a full-service concrete construction company providing a comprehensive suite of services since 1959. The company operates as a single integrated service platform with multiple specialized service lines rather than a modular software product. Core offerings include Concrete Cutting & Drilling (slab sawing, wall sawing, core drilling, wire sawing), Demolition (structural, interior, bridge), Locates & Testing (GPR scanning, concrete/soil testing), Concrete Rehab & Repair, Surface Prep & Grinding, Terrazzo & Epoxy & Polish flooring, Earthwork & Excavation, Concrete & Asphalt construction, and Trucking & Hauling. Specialty services include Bridge Demolition and Airfield/Runway Sawing. All services are delivered with in-house equipment, trained operators, and 24/7 availability.

Differentiator

Problem solved

Functional benefit

Brands

• Diamond Terrazzo: Terrazzo, Epoxy & Polish services subsidiary with dedicated website at DiamondTerrazzo.com offering custom terrazzo flooring, concrete polishing, and epoxy flooring solutions.

Quantifiable outcome

• EMR of 0.87 (below industry average of 1.0), demonstrating strong safety performance and reduced insurance costs for customers
• +2 more outcomes

Named customers18 records

Segments8 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core and minor.

• MapeicoreStrategic or Co-development PartnerPartnership with Mapei for terrazzo flooring solutions. Diamond utilizes Mapei's Ultratop terrazzo effect flooring system, a premium quality hard-wearing floor system applied as a veneer and polishable like concrete. The partnership enables fast-curing installation for reduced project timelines and customizable terrazzo finishes.
• Associated General Contractors of America (AGC)minorOthersIndustry association membership providing networking, training resources, and industry advocacy. Diamond participates in AGC safety programs and industry events.
• Concrete Sawing and Drilling Association (CSDA)coreOthersCore industry association membership in the trade association for concrete sawing and drilling contractors. Company featured in CSDA's Concrete Openings Magazine for project work. CSDA provides training standards and industry best practices.
• Associated Builders and Contractors (ABC)coreOthersCore membership in association providing safety training,STEP award program, and networking. Diamond has received Platinum and Gold STEP Awards through ABC membership and ABC Outstanding Award for Sub-Contractor.

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Holes Incorporated: Regional concrete drilling, sawing, and scanning contractor serving commercial, industrial, and infrastructure customers. Closely comparable to Diamond in core trade (concrete cutting, core drilling, GPR locates) and in serving GCs and DOTs.
• National Concrete Cutting & Drilling: Concrete cutting and drilling contractor providing slab sawing, wall sawing, core drilling, and selective demolition to commercial and infrastructure customers. Direct peer in specialty trade services.
• Penhall Company: Largest US concrete cutting, coring, scanning, and demolition services company. Directly comparable to Diamond on core service lines (slab/wall sawing, core drilling, GPR, demolition), customer types (DOTs, GCs, airports), and self-contained truck fleet model.
• Concrete Drilling & Sawing Co. Specialty concrete cutting, drilling, and selective demolition contractor with overlapping scope to Diamond (slab/wall sawing, core drilling, wire sawing) for commercial and infrastructure customers.
• Cardinal Concrete Cutting: Independent specialty concrete cutting and core drilling contractor serving commercial contractors and DOTs. Comparable business model and service mix to Diamond, though typically smaller in fleet scale.

Regional players

• Bierlein Companies: Midwest-based demolition, environmental, and specialty contractor with capabilities adjacent to Diamond's demolition, earthwork, and concrete services, primarily serving a different geography but with overlapping capabilities.

Broad incumbents

• D.H. Griffin Companies: Diversified demolition and site services contractor with strong bridge, industrial, and infrastructure demolition practices. Comparable to Diamond's bridge demolition and structural demolition service lines, though larger and broader in scope.
• VEIT & Company: Specialty contractor providing demolition, earthwork, and concrete services. Comparable to Diamond on demolition, earthwork/excavation, and concrete sawing lines, but operates as a broader, larger specialty contractor across multiple regions.

Others

• Mapei Corporation: Manufacturer of adhesives, sealants, and specialty chemical flooring systems including the Ultratop terrazzo system that Diamond uses. Strategic supplier / partner for Diamond's terrazzo, epoxy, and polish service line rather than a direct competitor.
• Husqvarna Construction Products: Manufacturer of concrete saws, drills, and surface preparation equipment. Not a direct competitor but adjacent ecosystem participant — Diamond purchases comparable cutting and drilling equipment to outfit its self-contained truck fleet.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/diamond-drilling-and-sawing-company

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 Diamond Companies