Callidus

What Callidus does

Callidus is a Perth, Australia-based industrial engineering services firm founded in 1997 that specializes in the repair, maintenance, management, servicing, and diagnostics of valves, actuators, and instrumentation. Its service portfolio spans valve supply, repair and specialist testing, asset integrity management, well integrity field services and workshop capabilities, flange and turnaround management, leak sealing, on-site welding, PSV management, and personnel supply. Adjacent offerings cover gas turbine components, fuel systems, control systems, surface technologies (thermal coatings, ENP, CNC, precision diamond lapping, APS and TiN), fabrication and welding, professional training, and emissions-elimination engineering focused on fugitive emissions, flare and vent monitoring, energy savings, and regulatory compliance.

In 2025, Callidus was acquired by Score Group Limited, a global advanced engineering technology services provider that itself sits within the D2Zero portfolio. Callidus now operates as 'Callidus, a Score Company,' integrated into a platform serving energy, power, minerals, water, defence, and aerospace end markets. The company employs 101–250 people and runs from Perth, Australia, with access through Score to an international field-service network. No public listing, funding rounds, or disclosed pricing models appear in the source material.

The business model is project- and service-based industrial engineering: revenue is generated through maintenance contracts, turnaround work, specialist testing, supply of parts and components, and training services delivered to industrial operators. Go-to-market relies on technical specialization, OEM-adjacent capabilities (e.g., authorised parts supply for gas turbines), and regulatory-compliance positioning around emissions reduction. Pricing, customer segmentation, and contract structures are not disclosed in the available data.

Name

Callidus

Legal name

Score Group Limited

Website

https://callidusgroup.com.au

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

101–250 employees

Short description

Callidus is a Perth-based industrial engineering services firm specializing in the repair, maintenance, and diagnostics of valves, actuators, and instrumentation, now operating as a subsidiary of Score Group Limited within the D2Zero portfolio.

Ownership category

akta.pro rank

Headquarters

HQ city

Perth

HQ country

Australia

HQ region

Oceania

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Core offering

Callidus provides specialist repair, maintenance, management, servicing, and diagnostics of valves, actuators, and instrumentation for industrial operators. Following its integration into Score Group Limited in 2025, the offering now spans valve and actuation support, emissions elimination, gas turbine components and services, well integrity, surface technologies, on-site services, fabrication and welding, and professional training across energy, power, minerals, water, defence, and aerospace sectors.

Product overview

Score Group Limited provides advanced engineering technology services as a unified platform of specialized offerings. The portfolio includes Emissions Elimination (fugitive emissions, flare monitoring, energy savings, regulatory compliance), Valves & Actuation (supply, repair, testing, asset integrity), Gas Turbines (fuel systems, parts supply, testing, field services, control systems), Well Integrity (field services, workshop capabilities, engineered solutions), Surface Technologies (thermal coatings, ENP, CNC, precision diamond lapping, APS and TiN, special processes), On-Site Services (flange management, turnaround management, leak sealing, on-site welding, personnel supply, PSV management), Engineering & Technology (engineering solutions, acoustic monitoring, severe services), Fabrication & Welding, and Training. Callidus, integrated into Score in 2025, operates as a Score company within this broader engineering services ecosystem.

Differentiator

Problem solved

Functional benefit

Products and services

• Emissions Elimination Engineering solutions focused on eliminating fugitive emissions, flare and vent emission monitoring, energy savings, and regulatory compliance for industrial operators.
• Valves & Actuation Valve supply, repair, specialist testing, and asset integrity management solutions ensuring valve support needs are met for industrial operators.
• Gas Turbines Gas turbine components and services including fuel systems and accessories, authorised parts supply, testing, field services, technical support, and control systems.
• Well Integrity Surface well integrity solutions including field services, specialist workshop capabilities, and engineered solutions.
• Surface Technologies Surface treatment and finishing services including thermal coatings, electroless nickel plating (ENP), CNC machining, precision diamond lapping, APS and TiN coatings, special processes, and aerospace technologies.
• On-Site Services Routine inspection and maintenance services including flange management, turnaround management, leak sealing solutions, on-site welding solutions, on-site personnel supply, and PSV management.
• Engineering & Technology Advanced engineering solutions encompassing engineering solutions, acoustic monitoring technologies, and severe services technologies.
• Fabrication & Welding Fabrication and welding solutions for industrial applications.
• Training Professional training services delivered by skilled and knowledgeable experts.

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Score Group LimitedcoreOthersCallidus has been integrated into Score Group Limited. News articles from 2026 indicate the ongoing integration process, with Callidus now operating as 'Callidus, a Score Company'. This appears to be an acquisition/integration relationship where Callidus has become part of the Score Group portfolio of companies.

Recent moves4 records

Expansion highlights5 records

Direct peers

• Flowserve Corporation: Global provider of industrial pumps, valves, seals, and automation services for the energy and process industries. Most directly comparable peer given overlap in valves, actuators, and aftermarket MRO services for oil & gas, power, and chemicals markets.
• IMI plc: Specialist in critical motion and fluid control solutions for industrial markets including energy, process industries, and transportation. Closely comparable to Callidus in valve and actuation technologies for severe-service industrial applications.
• Spirax-Sarco Engineering: Global specialist in steam systems, thermal energy management, and industrial fluid handling with a substantial valve business. Comparable to Callidus in industrial valve services for energy, process, and utilities markets.
• Circor International: Engineered flow control products for industrial and aerospace markets, including valves for severe-service applications. Comparable to Callidus in flow control and valve offerings across energy and aerospace.
• Velan Inc. Manufacturer of industrial valves for severe service applications in oil & gas, power, chemicals, and pulp & paper. Directly comparable to Callidus's valve and actuation services for similar industrial customers.
• KSB SE & Co. KGaA: Global manufacturer of pumps, valves, and related services for industrial applications including energy, water, mining, and process industries. Comparable to Callidus in industrial fluid handling and valve services.
• Pentair plc: Global water and fluid solutions provider with industrial flow technologies serving water treatment, mining, and industrial markets. Comparable to Callidus in flow control and industrial fluid handling services.

Broad incumbents

• Crane Co. Diversified industrial manufacturer of highly engineered products including process flow solutions, valves, and pumps. Comparable to Callidus in industrial valve offerings, though Crane operates with a much broader portfolio across multiple end markets.
• John Wood Group: Global engineering and consulting services company serving energy and industrial markets, including valve management and instrumentation services. Comparable to Callidus in industrial services for oil & gas and power customers, though operating at much larger scale and broader scope.
• SLB (formerly Schlumberger): Global energy technology company with the Cameron valves division serving oil & gas production. Comparable to Callidus in valves and wellhead equipment for upstream energy customers, though operating at vastly larger scale across the full oilfield services value chain.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/ScoreGroup
• LinkedInlinkedin.com/company/score-group
• Instagraminstagram.com/scoregroupltd

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

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 Callidus