Stronghold Engineering

Name

Stronghold Engineering

Legal name

Stronghold Engineering Inc.

Website

https://strongholdengineering.com

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

251–500 employees

Ownership category

akta.pro rank

Product category

Design-Build Construction Services

NAICS

Commercial and Institutional Building Construction (236220), Nonresidential Building Construction (2362), Heavy and Civil Engineering Construction (237), Utility System Construction (2371), Engineering Services (541330)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Heavy Construction Other Than Bldg Const - Contractors (1600), Services-Engineering Services (8711), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ)

akta.pro secondary industries

Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations) (EUAEADAA), Power Plant Electrical Systems EPC (Switchyard, Transformers, Protection & Controls) (EUAEAAAM), Battery Safety Engineering (Fire Detection/Suppression, Hazard Mitigation) & Code Compliance (EUAEAEAI)

Keywords

• Design-build construction
• Commercial general contracting
• Renewable energy construction
• Federal government contracting
• Civil infrastructure construction

Headquarters

HQ city

Perris

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Design-Build Construction Services: Full-service design and construction support including design-build, EPC, vertical, civil, and high-voltage electrical construction, new construction, and modernization. Projects range from ground-up facilities to technically challenging renovations.
2. Renewable Energy Systems: Solar installations (photovoltaic systems), solar carports, battery storage solutions, and operations and maintenance for renewable energy systems. Revenue generated from consulting, site inspection, project design, procurement, construction, and ongoing maintenance.
3. Civil Infrastructure Projects: Large civil, infrastructure, and electrical projects including bridges, waterlines, rail projects, and seismic upgrades. Projects exceeding $3 billion in construction cost over company history.
4. Government Construction Contracts: Federal construction services including accurate cost estimates, project management, sustainability compliance (LEED), ongoing maintenance for government buildings, and federal procurement compliance.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

Stronghold Engineering is a full-service design-build general contractor that delivers vertical, civil, and high-voltage electrical construction; new construction and modernization; and renewable energy systems including commercial solar PV, solar carports, battery energy storage, and microgrids. Services span pre-construction planning, EPC delivery, program management, general contracting, CM at Risk, and ongoing operations and maintenance for federal, higher education, healthcare, and civil infrastructure clients.

Product overview

Stronghold Engineering is an award-winning design and construction company offering a comprehensive portfolio of construction and engineering services. The company operates as a single unified service platform providing building construction, general contracting, electrical services, renewable energy solutions (including solar installations, solar carports, and battery storage), civil construction, and specialized services for higher education, healthcare, and federal government sectors. The core offerings span Design-Build, Engineering-Procurement-Construction (EPC), vertical/civil/high-voltage electrical construction, new construction, modernization, and renewable energy systems with operations and maintenance. The company self-performs significant portions of work including electrical, civil, and concrete, and has completed projects exceeding $3 billion in construction costs across its 34-year history.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial Building Construction Services Full-service building construction including pre-construction planning, contracted design and construction services, program management, general contracting, CM at Risk construction, and engineering consulting for all types of building projects.
• General Contracting Services Full-service design-build and support, EPC (Engineering-Procurement-Construction), vertical, civil, and high-voltage construction, new construction and modernization, and project consulting services for facility, electrical, and civil projects.
• Commercial Electrical Services Large-scale electrical infrastructure design and upgrades, solar photovoltaic systems, emergency generators, Tesla battery energy storage systems, HVAC and ductwork repairs, microgrid systems, and lighting systems for commercial and government facilities.
• Renewable Energy Engineering and Construction Comprehensive renewable energy construction services including consulting, site inspection, project design, procurement, construction, and operations and maintenance for solar and battery storage systems.
• Commercial Solar Installation Large-scale commercial solar power system installation services in Los Angeles and Southern California, covering consulting, project design, construction, project management, and ongoing operations and maintenance.
• Commercial Solar Carport Solutions Custom solar carport design and installation providing shade coverage, solar power generation, and increased parking lot safety for commercial, government, and institutional properties.
• Solar Battery Storage Solutions Battery energy storage systems including lithium-ion, lead-acid, and flow battery technologies for peak shaving, backup power, demand charge reduction, and renewable energy integration.
• Civil Construction Services Civil infrastructure construction including roads, bridges, dams, power grids, water treatment facilities, rail track extensions, bridge replacements, and waterline systems for public and private infrastructure.
• Higher Education Construction Construction and engineering services for universities and colleges including general contracting, design-build engineering, and sustainable building practices with LEED certification focus.
• Healthcare Construction Specialized healthcare facility construction including hospital renovations, medical center expansions, and compliance with infection control protocols and patient safety regulations.
• Federal Government Construction Services Government construction services including federal building projects, seismic retrofits, historical renovations, and compliance with federal and local standards and LEED sustainability requirements.

Quantifiable outcome

• Experience Modification Rate (EMR) of 0.78 - industry-leading safety performance
• +4 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration13 records

Feature5 records

Partnerships

One partnership is on record.

• Tesla MotorscoreTechnology or IntegrationBattery storage technology partner providing Tesla battery systems and Powerwall products for commercial and industrial energy storage installations.

Scale indicators11 records

Recent moves11 records

Expansion highlights5 records

Direct peers

• Mortenson Construction: Top-tier US general contractor with one of the largest renewable energy EPC practices (wind, solar, BESS). Directly comparable on solar/BESS integration capabilities, federal project execution, and self-perform scope strategy — though materially larger and geographically broader.
• Sundt Construction: Employee-owned general contractor with significant renewable energy (solar, wind, BESS) and heavy civil capabilities. Comparable in mid-size scale, self-perform scope, and federal/civil project mix, with strong safety culture similar to Stronghold's EMR-led positioning.
• Swinerton: West Coast-headquartered general contractor with an established renewable energy construction division (Swinerton Renewable Energy) covering solar, BESS, and microgrid scopes. Comparable in regional orientation, self-perform culture, and design-build delivery model for federal and institutional clients.
• Bernards: Family-owned Southern California general contractor serving commercial, institutional, and public-sector clients with design-build delivery. Closely comparable in size, regional orientation, family-ownership profile, and federal/institutional project mix.
• McCarthy Building Companies: Large national general contractor with a dedicated renewable energy and solar EPC division, serving federal, healthcare, and higher education clients. Closely comparable business model: design-build, self-perform electrical/civil, and major federal past performance — but at significantly larger scale and broader geography than Stronghold.

Broad incumbents

• DPR Construction: Large national technical builder serving advanced technology, healthcare, higher education, and federal clients. Comparable on design-build delivery and self-perform culture, with significantly greater scale and geographic diversification.
• Granite Construction: Public infrastructure and heavy civil construction company with significant water, transportation, and renewable energy infrastructure work. Comparable on heavy civil execution (waterlines, bridges, site works) and federal contracting, though publicly traded and substantially larger.
• Clark Construction Group: Major US general contractor with extensive federal, commercial, and civil infrastructure portfolio. Comparable on federal contract execution and design-build delivery, with substantially larger bonding capacity and geographic footprint.
• Hensel Phelps: Large national design-build general contractor with deep federal, healthcare, and higher education practices. Comparable on design-build delivery, self-perform capabilities, and government contract execution — though serving a broader portfolio at meaningfully larger scale.

Regional players

• Rudolph and Sletten: California-based general contractor focused on healthcare, higher education, and technology clients with design-build delivery. Comparable in California regional orientation and institutional client base, with similar mid-size project profile.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/strongholdengineering
• Xx.com/StrongholdEng
• LinkedInlinkedin.com/company/stronghold-engineering-inc.

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Stronghold Engineering