KLH Engineers
KLH Engineers is a 70-year-old, nationally ranked MEP engineering consulting firm serving aviation, healthcare, education, civic, and commercial clients across the United States, with a complementary software division selling proprietary Autodesk Revit add-ins.
- Company typePrivate
- Founded1955
- HeadquartersLexington, United States
- Headcount101–250
- GTM typeB2B
- OfferingServices
What KLH Engineers does
KLH Engineers (legal name Kohrs Lonnemann Heil Engineers, Inc.) is a 70-year-old, Kentucky-incorporated engineering consulting firm founded in 1955 and headquartered in Fort Thomas, in the Greater Cincinnati region. The firm provides mechanical, electrical, plumbing, fire protection, commissioning, energy, lighting, technology systems, and WELL building consulting services to nine vertical markets — Aviation, Civic, Education, Healthcare, Hospitality, Industrial, Lifestyle, Retail, and Workplace — through four U.S. offices and a wholly-owned New York subsidiary. Project engagements span all 50 states, DC, Puerto Rico, and Ontario, and have included marquee clients such as John Glenn Columbus International Airport ($2 billion terminal), CVG ($175 million ConRAC), St. Elizabeth Healthcare ($120 million cancer center), Portland International Airport, Rivian, University of Kentucky, and Holmes County Courthouse.
In parallel with consulting, KLH operates a software division built around the KLH Collection for Revit — a suite of add-ins (AEC Design Suite, Electrical Suite, Mechanical Suite, Model Management Suite) developed under the firm's "doer-programmer" model, where software engineers are embedded in MEP project workflows. As an Authorized Autodesk Developer, the firm also offers an ML-driven AutoCAD-to-Revit conversion service with a custom layer-mapping model, a Data Connection API for utilization data integration, and an upcoming Executive Dashboard for benchmark-driven analytics. Software is sold through 30-day free trials and annual subscriptions.
Revenue is generated primarily through fee-per-project engineering consulting engagements typical of the A/E/C industry, with secondary recurring revenue from software subscriptions, ML-powered conversion services, and T&M or retainer workflow consulting. Distribution is consultative and enterprise-led via direct relationships with owners, architects, and contractors, increasingly enabled through alternative delivery methods such as design-build, design-assist, IPD, and P3, and supported by software self-serve download channels. The firm remains privately held with no institutional or venture funding disclosed.
KLH Engineers firmographics
Firmographics- Name
- KLH Engineers
- Legal name
- Kohrs Lonnemann Heil Engineers, Inc.
- Website
- https://klhengrs.com
- Company type
- Private
- Founded year
- 1955
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- KLH Engineers is a 70-year-old, nationally ranked MEP engineering consulting firm serving aviation, healthcare, education, civic, and commercial clients across the United States, with a complementary software division selling proprietary Autodesk Revit add-ins.
- Ownership category
- akta.pro rank
KLH Engineers industry classification
Industry- Product category
- MEP Engineering Services
- NAICS
- Engineering Services (54133), Architectural, Engineering, and Related Services (5413)
- SIC
- Services-Engineering Services (8711), Services-Computer Integrated Systems Design (7373)
- akta.pro primary industry
- MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)
- akta.pro secondary industries
- Industrial & Process Engineering Consulting (BPAHAIAF), Construction Engineering & Constructability Consulting (BPAHAIAN), Systems Engineering & Technical Program Management (BPAHAIAI)
Keywords
Where KLH Engineers is headquartered
LocationHeadquarters
- HQ city
- Lexington
- HQ country
- United States
- HQ region
- North America
Offices4 records
Markets served
KLH Engineers business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales
Revenue model
- Engineering Consulting Services: KLH generates revenue primarily through professional engineering consulting services including mechanical, electrical, plumbing, fire protection, commissioning, energy consulting, and technology systems design. Projects are billed on a fee-per-project basis typical of A/E/C industry.
- Software Products and Subscriptions: KLH offers proprietary Revit add-in software suites (AEC Design, AEC Automate, Electrical, Mechanical, Model Management) available via 30-day free trials and paid subscriptions. Software is sold as toolkits for AEC professionals.
- AutoCAD to Revit Conversion Services: Proprietary conversion services to transition 2D AutoCAD designs to 3D Revit/BIM environments, leveraging machine learning tools.
- Consulting Services: Workflow analysis and operational efficiency consulting offered on T&M or retainer basis.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Software Suite Subscriptions |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels6 records
KLH Engineers product offering
Product offeringCore offering
KLH Engineers provides mechanical, electrical, and plumbing (MEP) engineering consulting for building projects, from preliminary system design and load calculations through construction administration and commissioning support. The firm complements its consulting practice with a suite of proprietary Revit add-in software tools and BIM-driven drafting automations that it has developed internally to accelerate MEP design production.
Product overview
KLH Engineers operates as a dual-entity company offering both engineering consulting services and proprietary software solutions. The software portfolio centers on the KLH Collection for Revit, a comprehensive bundle of Autodesk Revit add-in tools developed by KLH as an Authorized Autodesk Developer. The collection is organized into four main suites: AEC Design Suite (16 productivity tools for general Revit workflows), Electrical Suite (Bulk Circuit Editor, Multi-Circuiter, Sync Equipment), Mechanical Suite (Match Elevation, MIso, Space Helper), and Model Management Suite (Model Management Assistant, Sheet/View Editor). Additionally, KLH offers standalone services including AutoCAD to Revit conversion using machine learning, a Data Connection API for back-office integration, and an upcoming Executive Dashboard. The engineering services encompass Building Systems Engineering (MEP, commissioning, energy consulting, fire protection, lighting, technology systems, WELL building), BIM Technology Development (AR/VR, software engineering), Progressive Delivery Methods (design-build, IPD, P3), and Lean Practices (DfMA).
Differentiator
Problem solved
Functional benefit
Products and services
- MEP Engineering Consulting Services Mechanical, electrical, and plumbing (MEP) engineering design and consulting services for building projects, spanning preliminary design through construction administration. Delivered to architects, contractors, and building owners on commercial, institutional, and industrial projects.
- Proprietary Revit Add-in Software Suite Suite of proprietary add-ins developed by KLH Engineers for Autodesk Revit, supporting MEP drafting automation, modeling efficiency, and BIM workflow enhancement. Used to accelerate MEP design production within the firm's consulting practice and made available to other Revit users.
- Construction Administration Services Post-design engineering support during the construction phase, including shop drawing review, RFI response, field MEP coordination, and commissioning oversight. Available to general contractors, construction managers, and building owners.
Quantifiable outcome
- Saved client $900,000 through lighting cost verification at St. Elizabeth Cancer Center
- +2 more outcomes
Companies that use KLH Engineers
Customer profileNamed customers11 records
Segments9 records
Ideal customer profiles3 records
KLH Engineers technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration3 records
AI capability7 records
Feature6 records
KLH Engineers partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered strategic, core and minor.
- TrimblestrategicKLH collaborated with Trimble on developing the SysQue Model Manager tool, providing step-by-step method to standardize project setup and deliverables. Consistent models lead to more productive SysQue environment and streamlined workflows.
- Demain ConsortiumcoreKLH is a founding member of Demain, a consortium of like-minded AEC firms united by leveraging BIM standards to totally integrate data throughout design and construction. Partners include Construction Innovations, DPMG Corporation, RexMoore, and Tweet/Garot Mechanical. The consortium challenges traditional construction workflows through unified data standards.
- Levcon AnalyticsstrategicLevcon Analytics provides software and data consulting for building design and construction, embracing 'Data as a Discipline'. Offers project or strategic partnership for creating tangible data management strategies through planning, design, construction and operations.
- Autodesk Developer NetworkcoreAs an Authorized Autodesk Developer, KLH collaborates with Autodesk and other developers, previews software releases, and engages in the developer community. KLH has direct relationships with developers and product owners at Autodesk.
- Cincinnati 2030 DistrictminorKLH is a Professional Partner committed to reducing building energy use, water consumption and transportation commuting emissions by 50% by 2030 across Greater Cincinnati.
- Lean Construction Institute (LCI)strategicKLH participates in LCI to advocate for leaner construction approaches and share best practices aimed at reducing inefficiencies and waste.
- Construction Users Roundtable (CURT)strategicKLH participates in CURT as a trade association focused on new ideas and best practices in construction.
- Design Build Institute of America (DBIA)strategicKLH participates in DBIA to advance design-build delivery methods and alternative project delivery approaches.
Scale indicators8 records
Recent moves7 records
Expansion highlights6 records
KLH Engineers competitors and assessment
Company assessmentDirect peers
- Henderson Engineers: Privately held MEP specialty firm serving aviation, retail, healthcare, and commercial markets nationally; similar size band, similar project portfolio composition, and similar owner-architect-contractor go-to-market.
- Heapy Engineering: MEP and commissioning consulting firm serving higher education, healthcare, government, and aviation — directly overlapping with KLH's primary verticals and progressive delivery positioning.
- ME Engineers: MEP consulting firm with comparable aviation, sports/entertainment, and cultural venue portfolio; competes directly for large institutional and transportation infrastructure MEP scopes.
- Affiliated Engineers, Inc. (AEI): National MEP-focused engineering consulting firm with comparable mechanical, electrical, plumbing, fire protection, and lighting design practices across research, healthcare, aviation, and higher education — the closest pure-play comparable to KLH in scale and market mix.
- Smith Seckman Reid (SSR): Engineering consultancy with strong MEP and commissioning practices serving healthcare, aviation, and higher education clients; directly comparable services stack and end-market mix.
- Mazzetti: MEP and technology systems consulting firm with healthcare, aviation, and mission-critical focus; comparable in building systems and technology systems services to KLH's offering.
- TLC Engineering Solutions: MEP, fire protection, and commissioning consulting firm serving healthcare, education, commercial, and aviation clients; comparable services breadth and end-market diversification.
Broad incumbents
- WSP: Global professional services firm with a dedicated MEP and buildings practice that competes for aviation terminals, healthcare facilities, and commercial developments where KLH also bids.
- HDR: Global A&E firm with significant MEP, healthcare, and aviation practices; competes with KLH for large healthcare and airport projects but operates at much larger scale across diversified services.
- Burns & McDonnell: Large employee-owned engineering, architecture, and construction firm with substantial MEP practice among broader industrial and infrastructure portfolio; competes with KLH on aviation and healthcare MEP scopes but with vastly larger scale.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
KLH Engineers social profiles
Digital presenceKLH Engineers financial estimates
Financial estimateRevenue estimate
Valuation estimate
KLH Engineers leadership team
Management profileNumber of profiles
KLH Engineers subsidiaries and ownership
Company hierarchySubsidiaries1 record
KLH Engineers funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
KLH Engineers M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about KLH Engineers
What does KLH Engineers do?
KLH Engineers provides mechanical, electrical, and plumbing (MEP) engineering consulting for building projects, from preliminary system design and load calculations through construction administration and commissioning support. The firm complements its consulting practice with a suite of proprietary Revit add-in software tools and BIM-driven drafting automations that it has developed internally to accelerate MEP design production.
Is KLH Engineers a public or private company?
KLH Engineers is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was KLH Engineers founded?
KLH Engineers was founded in 1955. It employs 101 to 250 people.
Where is KLH Engineers based?
KLH Engineers is headquartered in Lexington, United States, in the North America region.
How does KLH Engineers make money?
Four revenue lines are on record. Engineering Consulting Services are the primary driver. The others are software Products and Subscriptions, autoCAD to Revit Conversion Services and consulting Services.
Who are KLH Engineers's main competitors?
Direct peers on record are Henderson Engineers, Heapy Engineering, ME Engineers, Affiliated Engineers, Inc. (AEI), Smith Seckman Reid (SSR), Mazzetti and TLC Engineering Solutions. Broad incumbents are WSP, HDR and Burns & McDonnell.
Does KLH Engineers have an API?
Yes. The Data Connection API provides a method for organizations to consume utilization data, which can then be integrated with back office solutions. It includes basic support services with <=24hr response times. Developer documentation is at www.klhengrs.com/software-solutions/data-connection-api.
What industry is KLH Engineers in?
KLH Engineers's product category is MEP Engineering Services. Its primary akta.pro industry code is BPAHAIAE, MEP (Mechanical, Electrical & Plumbing) Engineering Consulting, with a secondary code of BPAHAIAF, Industrial & Process Engineering Consulting. Its NAICS code is 54133 and its SIC code is 8711.