HHM

What HHM does

HHM (HEFTI. HESS. MARTIGNONI.) is a privately held Swiss engineering services firm specializing in total building technology planning, marketed under the HLKSE+ umbrella, which integrates heating, ventilation, air conditioning, sanitation, and electrical engineering into a single coordinated service offering. Founded in 1951 and headquartered in Aarau, the firm operates across seven German-speaking Swiss locations (Aarau, Basel, Bern, Chur, St. Gallen, Zug, Zürich) and serves architects, building developers, institutional and government clients, and industrial and commercial enterprises. The technical backbone relies on Building Information Modeling (BIM) as a standard methodology, supplemented by digital twin delivery at project handover, prefabrication planning for electrical systems, and participation in Integrated Project Delivery (IPD) frameworks through the IPD Lab at Switzerland Innovation Park Central.

The firm employs over 280 specialists and operates as a project-based B2B professional services business, with dedicated project managers acting as single points of contact for clients. Service revenue is generated through project-based engineering fees for planning and consulting services, with marquee engagements including the Roche pRED research and development center (80,000 m² laboratory space within a CHF 1.2 billion total project budget), the Polizei- und Justizzentrum Zürich (33,558 m², over 360 km of electrical conduits, 7,000+ UKV links), and the Thermoplan "unique" IPD project in Weggis. Customer segments span pharmaceutical (Roche), food retail (Migros), manufacturing (Thermoplan), and government (Cantons of Zürich and Bern), with additional specialized offerings in photovoltaics, e-mobility infrastructure, fire protection, security, and sustainability consulting.

HHM has pursued growth through a roll-up strategy, acquiring Moor Elektroplan AG (2005), the electrical division of PZM (2006), Rolf Grau Elektroplanungen AG (2007), and Hugentobler Ing. HLKS GmbH (2018), which added HLKS (HVAC) capabilities. The firm is founder/management-controlled, with leadership transitioned to a new generation in 2009-2010 under CEO Urs von Arx and Board President René Hert, complemented by COO Tobias Müller since 2020. The company invests in internal talent development via the HHM Academy (including an FH-accredited CAS program in "Leadership in Digital Construction" launched in 2021), and is a core member of Switzerland Innovation Park Central.

Name

HHM

Legal name

HEFTI. HESS. MARTIGNONI.

Website

https://hhm.ch

Company type

Private

Founded year

1951

Operating status

Operating

Headcount range

51–100 employees

Short description

HHM (HEFTI. HESS. MARTIGNONI.) is a Swiss engineering services firm providing integrated HLKSE+ building technology planning (HVAC, electrical, sanitation, building automation) using BIM methodology. It serves architects, developers, government, and industrial clients across German-speaking Switzerland with over 280 specialists.

Ownership category

akta.pro rank

Product category

Building Technology Engineering Services (MEP / HLKSE+ Planning)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Building Thermal Controls & Building Management Systems (HVAC BMS) (IMAHAKAK)

akta.pro secondary industry

HVAC Controls & Optimization (Smart Thermostats, VAV, Chillers/Boilers Controls) (BPABAGAB)

Keywords

• Building technology engineering
• Electrical engineering services
• HVAC engineering
• BIM coordination
• Building automation systems

Headquarters

HQ city

Zug

HQ country

Switzerland

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Services: Professional engineering services for building technology planning including electrical engineering, HLKSE systems, building automation, and related consulting. Revenue is generated through project-based fees for planning and engineering services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

HHM provides integrated building technology planning (HLKSE+) for new construction and infrastructure projects, covering heating, ventilation, air conditioning, sanitation, electrical systems, and building automation. Services are delivered as professional engineering planning and consulting, supported by BIM-based coordination, digital twin handover, prefabrication planning, and Integrated Project Delivery (IPD) processes for architects, developers, government institutions, and industrial clients across Switzerland.

Product overview

HHM (HEFTI. HESS. MARTIGNONI.) is a Swiss building technology engineering firm offering comprehensive Gebäudetechnik-Planung services under the HLKSE+ umbrella. The core portfolio consists of integrated engineering disciplines including Gesamt-Gebäudetechnik (total building services), HLKS-Engineering, Elektro Engineering, and Gebäudeautomation, supported by Gesamtkoordination/BIM for digital planning coordination. Specialized services include Nachhaltigkeit (sustainability), Energieversorgung (energy supply), Photovoltaik (solar systems), E-Mobilität (e-mobility), Brandschutz (fire protection), and Infrastruktur. The firm operates the HHM Academy for internal professional development and publishes the e-kontakt newsletter. HHM serves clients across multiple Swiss locations (Aarau, Basel, Bern, Chur, St. Gallen, Zug, Zürich) with over 280 employees, positioning itself as a digital Gesamt-Gebäudetechnik-Planer (total building technology planner) rather than a traditional product company.

Differentiator

Problem solved

Functional benefit

Products and services

• Gesamt-Gebäudetechnik (HLKSE+) Integrated total building technology planning service covering heating, ventilation, air conditioning, sanitation, and electrical systems (HLKSE+) for new construction and infrastructure projects, delivered to architects, developers, and institutional clients.
• HLKS-Engineering Heating, ventilation, air conditioning, and sanitation engineering services for building projects, providing mechanical systems planning as part of HHM's HLKSE+ portfolio.
• Elektro Engineering Electrical engineering services including power distribution, lighting systems, and electrical infrastructure planning for buildings and infrastructure.
• Gebäudeautomation Building automation engineering services integrating HVAC, lighting, and security controls for intelligent building management.
• Gesamtkoordination/BIM Overall project coordination using Building Information Modeling (BIM) methodology for integrated digital planning across all building services disciplines.
• Nachhaltigkeit (Sustainability) Sustainability consulting and planning services including environmental impact assessment and green building certification support for construction projects.
• Energieversorgung (Energy Supply) Energy supply planning including district heating, cogeneration, and renewable energy integration solutions for buildings and sites.
• Photovoltaik (Solar PV) Solar photovoltaic system planning and design services for building-integrated and rooftop installations, including facade PV applications.
• E-Mobilität (E-mobility Infrastructure) Electric mobility infrastructure planning including charging station deployment and electrical grid integration for buildings and real estate.
• Licht/Lichtverschmutzung (Lighting Design) Lighting design services addressing both functional illumination and light pollution reduction for sustainable urban and architectural environments.
• Sicherheit/Türengineering (Security and Door Engineering) Security systems engineering and door/gate access control planning for building safety applications, including high-security public facilities.
• Brandschutz (Fire Protection) Fire protection engineering including detection systems, suppression planning, and evacuation safety measures for buildings and infrastructure.
• Infrastruktur (Infrastructure Planning) Infrastructure planning services for transportation, utilities, and public facilities beyond standard building systems.

Quantifiable outcome

• Roche pRED project: 80,000 m² laboratory + 30,000 m² office + 40,000 m² garage with CHF 1.2 billion total costs over nearly a decade
• +1 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered core, flagship and minor.

• Selmoni Ingenieure AGcoreStrategic or Co-development Partner · 1 January 2015Planning partnership (Planergemeinschaft S+H) for the Roche pRED project, providing all electrical planning services from preCD through Detail Design phases. The partnership operated as a unified entity with maximum transparency and trust between the two firms.
• Switzerland Innovation Park Central (Rotkreuz)coreStrategic or Co-development PartnerHHM is a core member of the Innovation Park Zentralschweiz in Rotkreuz and active in the Building Excellence ecosystem. The company participates in IPD Lab activities at this innovation hub.
• Thermoplan AGflagshipStrategic or Co-development PartnerIPD partnership for the unique project - a pioneering construction project in Weggis where all participating companies and trades are networked from the beginning. HHM's Urs von Arx serves on the IPD Executive Team.
• Hugentobler Ing. HLKS GmbHcoreStrategic or Co-development PartnerAcquired in 2018, expanding HHM's HLKS (HVAC) capabilities and establishing presence in St. Gallen region.
• Rolf Grau Elektroplanungen AGcoreStrategic or Co-development PartnerNew subsidiary operational since July 1, 2007, strengthening electrical planning services.
• IPD Lab SwitzerlandcoreStrategic or Co-development PartnerHHM is an active part of IPD Lab at Switzerland Innovation Park Zentral, contributing to the development of Integrated Project Delivery in Swiss construction industry.
• stiftung bilding (Building Award)minorStrategic or Co-development PartnerHHM, through CEO Urs von Arx as president of the foundation, supports the Building Award that inspires young engineering talent.

Scale indicators6 records

Recent moves14 records

Expansion highlights6 records

Direct peers

• Basler & Hofmann: Swiss engineering consultancy providing building services, infrastructure, and energy planning. Comparable to HHM in offering integrated engineering for complex building projects with strong BIM and sustainability practices.
• Gruner: Swiss engineering group with building services, structural, and infrastructure divisions. Competes with HHM on integrated HLKS planning for commercial, institutional, and industrial projects in Switzerland.
• Hager Partner AG: Swiss engineering consultancy with strong electrical and building services planning practices. Comparable to HHM in serving enterprise and institutional clients across Switzerland with integrated engineering offerings.
• Amstein + Walthert: Largest Swiss engineering firm specializing in building technology, energy, and sustainability consulting. Directly comparable to HHM as a comprehensive HLKSE+ engineering services provider serving architects, developers, and government across Switzerland.
• Selmoni Ingenieure AG: Swiss engineering firm partnered with HHM on the Roche pRED project. Offers electrical and building services planning directly comparable in scope, methodology, and Swiss enterprise client base.
• TBF + Partner: Swiss engineering firm offering building technology (HLKS), electrical, and structural engineering. Direct competitor for mid-sized integrated engineering mandates in German-speaking Switzerland.

Broad incumbents

• Arup: Global engineering firm with strong sustainability, BIM, and integrated building services practices. Competes with HHM for landmark Swiss projects where international credentials and innovation credentials are required.
• AFRY (formerly Pöyry): European engineering and design consultancy with building services and energy practices. Competes with HHM on large-scale institutional and industrial projects where global delivery capability matters.
• Buro Happold: International engineering consultancy with integrated MEP and sustainability practices. Comparable to HHM in methodology and complex-building focus, though operating at a much larger international scale.
• WSP in Switzerland: Global professional services firm with significant Swiss building services engineering presence. Larger and broader than HHM, competing for major nonresidential and infrastructure mandates as a full-service consultancy.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UC-VviAjD2-i_rPxQTUPtSZA
• LinkedInch.linkedin.com/company/hefti--hess--martignoni-
• Xx.com/hhmgruppe
• Facebookfacebook.com/hhmgruppe

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries4 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 HHM