What ÖSTAP Engineering & Consulting GmbH does

ÖSTAP Engineering & Consulting GmbH is a privately held Austrian engineering consulting firm headquartered in Vienna, described as one of the oldest planning offices in Austrian water management. The company provides integrated engineering and consulting services across the full water cycle: wastewater systems and treatment plants, drinking water supply networks, surface water management, flood protection, hydraulic and hydrodynamic modeling, digital pipe cadastre (Leitungskataster), waste management, small wastewater treatment plants, restoration, project controlling, project financing, road construction, and energy certificates. Its proprietary capabilities include hydrodynamic simulation tools for sewer system analysis (per ÖWAV-Regelblatt standards) and digital pipe information systems including the IKAS Evolution shaft survey platform.

The firm serves two primary verticals: municipal governments and public authorities (wastewater, water supply, flood protection, infrastructure rehabilitation) and commercial/industrial clients (pre-treatment plants, oil/grease trap control, industrial discharge monitoring). Geographically, ÖSTAP operates from five Austrian offices (Vienna headquarters, Ameis, Salzburg, Spittal an der Drau) and maintains representative offices in Slovakia, Kosovo, and Bosnia and Herzegovina, with project experience extending to Mongolia, Albania, and Macedonia. International project execution is supported by financial partnerships for Austrian Softloan and export financing arrangements.

The business model is project-based professional services with sales-led B2B go-to-market, targeting direct relationships with municipal decision-makers and industrial clients. The firm is ISO 9001 certified, an ANKÖ member, and won 2nd prize at the Neptun Wasserpreis 2021 for green infrastructure assessment methodology. Leadership is led by CEO DI Christoph Gierlinger with authorized officers DDI Dr. Johannes Leimgruber and DI Eveline Bruckmüller. The company is independently owned with no disclosed external investors, PE/VC ownership, or parent company.

Name

ÖSTAP Engineering & Consulting GmbH

Legal name

ÖSTAP Engineering & Consulting GmbH

Website

https://oestap.at

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

ÖSTAP Engineering & Consulting GmbH is an Austrian engineering consulting firm specializing in water management, wastewater treatment, water supply, flood protection, and hydraulic simulation, serving municipalities, public authorities, and industrial clients across Austria, Central Europe, and Southeastern Europe.

Ownership category

akta.pro rank

Product category

Water Management Engineering Consulting

NAICS

Engineering Services (54133), Environmental Consulting Services (54162), Other Scientific and Technical Consulting Services (541690)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industry

Systems Engineering & Technical Program Management (BPAHAIAI)

Keywords

• Wastewater engineering consulting
• Water supply infrastructure
• Flood protection planning
• Hydraulic simulation services
• Municipal engineering consulting

Headquarters

HQ city

Vienna

HQ country

Austria

HQ region

Europe

Offices6 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 and Consulting Services: Project-based professional services for water management, wastewater treatment, water supply, flood protection, and related infrastructure engineering. Services include planning, design, construction supervision, and project controlling.
2. Project Financing Services: Specialized financing services including Austrian Softloan and export financing for infrastructure projects in selected countries such as Bosnia and Herzegovina, Albania, Macedonia, Mongolia, and Kosovo.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

ÖSTAP Engineering & Consulting GmbH is a long-established Austrian engineering and consulting firm specializing in water management infrastructure. It provides a comprehensive portfolio of integrated consulting services including wastewater systems and treatment plant design, water supply network engineering, flood protection planning, hydraulic and hydrodynamic modelling, surface water drainage, waste management, digital pipe information systems (Leitungskataster), restoration and rehabilitation planning, small wastewater treatment plants, project controlling, project financing (Austrian Softloan and export financing), road construction, and energy certificates.

Product overview

ÖSTAP Engineering & Consulting GmbH is a long-established engineering and consulting firm specializing in Austrian water management infrastructure. The company offers a comprehensive portfolio of integrated consulting services rather than a software product. Core offerings span wastewater treatment systems, water supply networks, flood protection, hydraulic modelling, digital pipe information systems, waste management, and supporting services including financing, road construction, and energy certification. The various service areas are interconnected—hydrodynamic simulations support wastewater and flood protection design, digital pipe cadastre feeds into restoration planning, and project controlling coordinates the full project lifecycle from planning through site supervision.

Differentiator

Problem solved

Functional benefit

Products and services

• Wastewater Systems and Treatment Plants Comprehensive engineering for municipal and industrial wastewater systems including sewer design, sewage treatment plants, industrial pre-treatment, digitalisation of existing systems, TV inspection, restoration, and discharge monitoring for Austrian municipalities and industrial clients.
• Water Supply Systems Engineering and consulting for drinking water supply including water extraction facilities, reservoirs, drinking water treatment plants, distribution networks, pumping tests, and regulatory technical inspections under Austrian federal water law for municipal and industrial clients.
• Surface Dewatering Engineering for stormwater management including absorbing wells, pre-treatment plants for street and parking area drainage, retention and storage basins, and linear discharger systems for municipalities and industrial sites.
• Flood Protection Planning and design of flood detention and storage basins, flood risk assessment, flood protection planning, and pond design for municipalities and property developers in flood-prone areas.
• Waste Management Engineering and consulting for waste management infrastructure including landfill design, waste disposal concepts, landfill cover and monitoring, composting plants, and waste collection centers for municipalities.
• Hydraulic and Hydrodynamic Modelling Hydrodynamic simulation of sewer systems to analyze flow conditions, simulate combined sewer systems, and dimension overflow and storage structures per ÖWAV-Regelblatt standards for municipalities and engineering firms.
• Commercial and Industrial Services Industrial wastewater consulting including pre-treatment plants, treatment plants, oil and grease trap control, industrial discharger monitoring, and technical consulting for commercial and industrial enterprises.
• Digital Pipe Information Systems (Leitungskataster) Cadastre and digital documentation services for sewage and water supply networks including TV-inspection tendering and monitoring, shaft surveys via IKAS Evolution, damage classification, and rehabilitation planning for municipalities.
• Restoration Services Tendering, monitoring, and documentation of infrastructure restoration works with local construction supervision for municipalities and infrastructure owners.
• Small Wastewater Treatment Plants Engineering for small wastewater treatment plants including variant testing, wastewater plan revision, water recharging, commissioning, authorization processing, and maintenance for small communities and private clients.
• Project Controlling Comprehensive project controlling services covering planning, awarding, site supervision, and financing coordination for large public authority infrastructure projects.
• Project Financing Services Arrangement of Austrian Softloan and export financing for international infrastructure projects in Bosnia and Herzegovina, Albania, Macedonia, Mongolia, Kosovo, and other selected countries, provided in partnership with banking institutions.
• Road Construction Road construction planning including street design, routing, green area design, coordination of utility providers, road drainage, and local construction supervision for municipalities and infrastructure owners.
• Energy Certificates Energy performance certificates for office buildings, one and multi-family houses, and multi-storey residential buildings, for both new construction and renovation, for property owners and developers.

Quantifiable outcome

• 2nd place in WasserFORSCHT category at Neptun Wasserpreis 2021 for green infrastructure methodology

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

Feature4 records

Partnerships

Two partnerships are on record, tiered core and supporting.

• TRM – Tiroler Rohre GmbHcoreStrategic or Co-development Partner · 4 March 2020ÖSTAP acts as subcontractor to TRM – Tiroler Rohre GmbH for international water infrastructure projects. For the Mongolia project, ÖSTAP is responsible for planning and local construction supervision of water supply systems for the community of Altai.
• ÖWAV (Austrian Water and Waste Management Association)supportingStrategic or Co-development PartnerProfessional collaboration with ÖWAV for industry seminars and continuing education. ÖSTAP experts present at ÖWAV events on topics such as stormwater infiltration guidelines (Regelblatt 35 and 45).

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Hydroplan Ingenieurgesellschaft: Specialist water-resources and hydraulic engineering consultancy active in Austria/CEE. Highly comparable to ÖSTAP as a similarly scoped niche water engineering firm serving municipalities and industrial clients.
• FCP Fritsch Chiari & Partner ZT GmbH: Austrian engineering consultancy offering civil, structural, and infrastructure services. Comparable to ÖSTAP as an Austrian engineering firm serving public-sector clients in similar infrastructure categories.
• TBH Ingenieure GmbH: Austrian engineering consultancy focused on infrastructure and environmental projects. Comparable because it competes for similar municipal and infrastructure planning mandates in Austria.

Broad incumbents

• Arcadis: Global design and consultancy firm with water and resilience practices. Comparable to ÖSTAP in addressing municipal water infrastructure, flood risk, and climate adaptation advisory.
• WSP: Global professional services firm with significant water and environment practice serving municipal clients. Comparable because it competes for similar wastewater, flood, and water supply consulting mandates in Europe.
• Ramboll: Global engineering, environment, and water consultancy serving municipal clients across Europe. Comparable to ÖSTAP in water/wastewater infrastructure advisory and design services.
• AFRY (formerly Pöyry): Nordic-headquartered global engineering consultancy with a strong water and environment practice. Comparable to ÖSTAP as it serves municipal water and wastewater clients across Europe with overlapping technical capabilities.
• Sweco: European engineering consultancy with a dedicated water business serving municipalities and utilities. Comparable because it operates in adjacent European markets with overlapping water infrastructure service lines.
• Drees & Sommer: German engineering consultancy with infrastructure and environment services for public-sector clients. Comparable because it competes in adjacent European infrastructure engineering markets with overlapping municipal client base.
• ILF Consulting Engineers: Large Austrian-headquartered international engineering consultancy with water, environment, and infrastructure practices. Comparable because it operates from Austria, covers water management, and bids for similar municipal and international infrastructure work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/oestap

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 ÖSTAP Engineering & Consulting GmbH