Name

3S MEP + Structural

Legal name

3S MEP + S PLLC

Website

https://3smep.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

MEP and Structural Engineering Services

NAICS

Architectural, Engineering, and Related Services (5413)

akta.pro primary industry

MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)

akta.pro secondary industries

Data Center MEP & Commissioning (Electrical, Mechanical, BMS, Integrated Systems Testing) (IMAFAIAH), Fire Protection & Life Safety Systems (Firewater, Suppression, Detection, Alarm) (EUAEAFAG), Medium/Low-Voltage Power Distribution (MCCs, Panels, UPS, Grounding) (EUAEAFAB), Energy Optimization & Retro-Commissioning for MEP Systems (BPABACAL)

Keywords

• MEP engineering services
• Structural engineering design
• Building information modeling
• Energy modeling services
• Fire protection engineering

Headquarters

HQ city

Chicago

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Design and Consulting Services: 3S MEP + S generates revenue through professional engineering and design services billed on a project basis. Services include MEP & FP engineering, structural engineering, BIM, energy modeling, cleanroom design, arc flash studies, and solar PV design. Revenue is project-based and one-time per engagement, with potential for follow-on projects from existing clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

3S MEP + S provides integrated Mechanical, Electrical, Plumbing (MEP), Fire Protection, Fire Alarm, Structural Engineering, BIM, Energy Modeling, Arc Flash and Power System Studies, Cleanroom, and Solar PV engineering design services. The firm delivers coordinated, code-compliant designs for commercial, residential, industrial, and institutional buildings, spanning schematic design through construction administration.

Product overview

3S MEP + Structural operates as an integrated engineering services firm offering a unified portfolio of MEP (Mechanical, Electrical, Plumbing) and Structural Engineering design services. The core offering centers on Mechanical Engineering Design Services, Electrical Engineering Design Services, Plumbing Engineering Design Services, Fire Protection Engineering Services, Structural Engineering Services, and BIM Services. These are complemented by specialized services including Energy Modeling Services for building performance simulation, Clean Room Design Services for pharmaceutical and healthcare facilities, Arc Flash and Power System Studies for electrical safety compliance, and Solar PV Engineering and Design for renewable energy projects. The services leverage BIM drafting tools (AutoCAD and Revit) and specialized engineering software (HAP for HVAC, ETAP/EasyPower/SKM for power analysis, Design Builder/EnergyPlus for energy modeling). Project delivery follows a four-stage Discover-Design-Coordinate-Deliver methodology, with services spanning schematic design through construction administration across commercial, residential, industrial, and institutional building types.

Differentiator

Problem solved

Functional benefit

Products and services

• Mechanical Engineering Design Services HVAC, heating, cooling, and ventilation system design for commercial and residential buildings, including heat load calculations, system design, and energy-efficient solutions using AutoCAD and Revit.
• Electrical Engineering Design Services Comprehensive electrical system design including power distribution, lighting, emergency power systems, grounding, and low-voltage infrastructure for commercial, residential, and industrial developments, with knowledge of NEC, CEC, IBC, and NFPA standards.
• Plumbing Engineering Design Services Design of domestic water, sanitary, storm drainage, natural gas, compressed air, and specialized systems including lab and medical gas piping for industrial, commercial, and residential projects.
• Fire Protection Engineering Services Fire protection and fire alarm system design including sprinkler systems (wet, dry, pre-action, deluge), standpipe design, fire pump design, and clean agent suppression systems compliant with IBC, IFC, and NFPA standards.
• Structural Engineering Services Structural analysis, foundation design, superstructure design, steel connection design, seismic bracing, and structural BIM modeling using Revit and AutoCAD for commercial and institutional projects.
• Energy Modeling Services Building performance simulation using DesignBuilder, EnergyPlus, and Carrier HAP to evaluate energy efficiency, support LEED/BREEAM certification, and provide compliance documentation per ASHRAE 90.1 Appendix G, including EPAct certification using eQUEST, daylight modeling, renewable energy studies, carbon footprint analysis, ENERGY STAR benchmarking, and Net-Zero consulting.
• Clean Room Design Services MEP design for cleanroom projects following ISO classes 1-9 standards, including HVAC, electrical, plumbing, HEPA filtration, contamination control, temperature and humidity management, GMP-compliant product/personnel flow, cleaning protocols, process heat load, exhaust, and ESD prevention for pharmaceutical and healthcare facilities.
• Arc Flash and Power System Studies Power system analysis including arc flash hazard analysis per IEEE 1584 and NFPA 70E, short-circuit and fault current analysis, protective device coordination studies, equipment evaluation and SCCR verification, TCC development, electrical system modeling and validation, arc flash mitigation assessments, and utility/DER impact studies using SKM Power*Tools, ETAP, and EasyPower.
• Solar PV Engineering and Design Solar photovoltaic system design for commercial, industrial, and utility-scale projects including system sizing, equipment selection, string design, single-line diagrams, layout drawings, voltage drop calculations, grounding and bonding, rapid shutdown compliance, utility coordination, and BESS integration, compliant with NEC Article 690, 705, 706, NFPA 70, NFPA 70E, IBC, IFC, and local utility interconnection requirements.
• BIM Services Building Information Modeling services including BIM drafting, MEP and structural BIM modeling up to LOD 500, clash detection and conflict resolution, 4D construction phasing and simulation, Revit Family creation, and facility/asset information modeling using AutoCAD and Revit.

Named customers15 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

Integration6 records

Feature6 records

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Page (Page Southerland Page): Architecture and engineering firm delivering MEP, structural, and building technology design. Comparable in scope and target markets (healthcare, education, commercial), though Page is significantly larger.
• ME Engineers: Specialized MEP and technology systems consulting firm serving commercial, sports, and cultural buildings. Overlaps directly on core MEP + structural integration and BIM workflows.
• Affiliated Engineers (AEI): Multidisciplinary engineering consultancy focused on MEP, structural, and energy services for complex building projects. Strong overlap on integrated delivery and specialized services like labs and cleanrooms.
• Syska Hennessy Group: MEP and critical facilities engineering consultancy with strong presence in healthcare, data centers, and cleanroom environments — a direct competitor on 3S's specialized cleanroom and high-rise work.
• IMEG Corporation: Top US MEP and structural engineering consultancy with similar full-service building design portfolio. Closely comparable on services, project types, and multi-state US delivery, though significantly larger.

Broad incumbents

• Burns & McDonnell: Major US engineering firm with MEP and structural services across multiple verticals. Competes on large commercial and industrial programs though primarily a much larger incumbent.
• NV5 Global: Technical engineering and consulting firm with MEP, energy, and building performance services. Competes on similar project types though NV5 is publicly traded and significantly larger.
• Stantec: Global engineering, architecture, and environmental services firm with a large buildings practice. Overlaps on MEP, structural, energy modeling, and cleanroom projects across all of 3S's verticals.
• WSP USA Buildings: Global professional services firm with substantial MEP and structural engineering practice. Competes for the same building projects but operates as a much larger, multi-disciplinary incumbent.

Emerging players

• Mazzetti: MEP and healthcare infrastructure engineering consultancy. Overlaps on cleanroom, healthcare, and energy services but with a narrower focus and different scale profile.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/3s-meps

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 3S MEP + Structural