Symphony

What Symphony does

Symphony Infrastructure Partners is an Australian independent, vertically integrated grid connection infrastructure partner, formed in 2024 through a $488 million Series A from Blackstone and the consolidation of five wholly-owned specialist businesses: RJE (HV substations, switchyards and electrical balance of plant), Catalpa (transmission line towers, stringing and civil works), Cowell Electric (powerline construction and remote energy systems), Horizon United Group (civil construction, trenching and earthworks), and ART (specialist wind resource assessment and modular power systems). The company employs 1,300+ specialists nationally across offices in Sydney (headquarters), Adelaide, Melbourne, Brisbane, Perth and Hobart, and has managed 11.7 GW+ of grid connections, delivered 100+ HV substations, constructed 5,000+ km of powerlines, and executed 3,000+ projects across the group.

Symphony's core offering is high-voltage grid connection infrastructure — substations, switchyards, transmission lines and electrical balance of plant — packaged as standardised, manufactured-in-house products deployed under three partnership models: Development Partnership (full lifecycle co-investment from day one), Delivery Partnership (detailed design through lifecycle asset management under a single accountability), and EPC + Operations Partnership (hybrid EPC contract plus services agreement with optional ownership buyback). Discrete services including concept and grid strategy support, TNSP stakeholder management, and complete maintenance solutions are also delivered outside the three main models.

The company targets four customer segments: renewable energy developers (wind, solar, battery storage), data center and AI factory operators, mining and industrial facilities, and gas generation developers. Revenue is generated through B2B project-based enterprise engagements with pricing determined by project scope, partnership model and capital deployment requirements. Distribution is exclusively through direct enterprise partnerships rather than third-party channels, with sales structured around early project engagement to maximise value creation across the eight-phase connection lifecycle from concept through ownership and lifecycle asset management.

Name

Symphony

Legal name

Symphony Infrastructure Partners

Website

https://symphonyinfra.com.au

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Symphony Infrastructure Partners is an Australian independent, vertically integrated grid connection infrastructure partner that develops, delivers, and operates high-voltage substations, switchyards, transmission lines, and electrical balance of plant for renewable energy developers, data center operators, mining companies, and industrial facilities across Australia.

Ownership category

akta.pro rank

Product category

Grid Connection Infrastructure Services

NAICS

Electric Power Generation, Transmission and Distribution (2211), Electric Power Transmission, Control, and Distribution (22112), Electric Bulk Power Transmission and Control (221121)

SIC

Electric Services (4911), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Grid Interconnection & Collector Substation EPC (Utility-Scale Renewables) (EUAEABAK)

akta.pro secondary industries

Electrical Balance-of-Plant EPC (MV Collection, Cabling, Earthing, Lighting) (EUAEADAB), Substations, Transformers & Grid Step-Up Facilities (EHV Substations, GSU Transformers) (EUAMAFAE), Transmission Interconnection & Line Works (Gen-Tie Lines, Overhead/Underground Lines) (EUAMAFAF), Power Plant Electrical Systems EPC (Switchyard, Transformers, Protection & Controls) (EUAEAAAM), Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ), Commissioning, Testing & Energization Services (Pre-Commissioning, Grid Code Compliance) (EUAMAFAK)

Keywords

• Grid connection infrastructure
• High voltage substations
• Transmission line construction
• Renewable energy EPC
• Energy transition infrastructure

Headquarters

HQ city

Sydney

HQ country

Australia

HQ region

Oceania

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Development Partnership Revenue: Co-investment model where Symphony deploys capital, engineering, and delivery expertise as a partner in network assets from project day one, with lifecycle risk management and long-term alignment
2. Delivery Partnership Revenue: Integrated delivery from detailed design through construction, testing, commissioning, and operations/maintenance with single point of accountability for the critical path to grid connection
3. EPC + Operations Revenue: Hybrid commercial model with works under standard EPC contract and operations/maintenance under services agreement or partnership; optional ownership buyback when capital recycling suits
4. Discrete Services Revenue: Individual services including concept and grid strategy support, grid connection application leadership, TNSP stakeholder management, and complete maintenance solutions

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

Symphony develops, delivers and operates the high-voltage assets (substations, switchyards, transmission lines, electrical balance of plant) that connect renewable energy generation, energy storage, data centre and industrial projects to Australia's electricity grid. Through three partnership models — Development Partnership, Delivery Partnership, and EPC + Operations Partnership — the company serves as an independent, vertically integrated connection infrastructure partner with 1,300+ in-house specialists covering engineering, manufacturing, construction, civil works and operations across the full project lifecycle.

Product overview

Symphony provides a secure messaging platform for financial markets as its core offering, augmented by an Agentic AI Layer for autonomous financial market operations and a Control Plane for orchestrating agentic AI workflows across enterprise systems. The Symphony Market Place serves as an ecosystem for third-party AI agents such as P.R.I.M.E. Brokerage AI Agents. The platform extends into regulated industries including insurance through a federation product that supports messaging via SMS, WhatsApp, and WeChat. Symphony operates as a platform-plus-modules architecture where the secure messaging core integrates with AI-powered automation and orchestration capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Development Partnership Full lifecycle co-investment partnership covering Concept & Grid Strategy, Early Planning & Design, Grid Modelling & Connection Application, Engineering & Design, Construction, Testing & Commissioning, Operations & Maintenance, and Ownership & Lifecycle Asset Management. Symphony deploys capital, engineering and delivery expertise as a co-invested partner in the project's network assets from day one, providing a de-risked path to FID, fastest path with no rework, fast-tracked delivery through aligned incentives, execution certainty on time and cost, and lifecycle risk management.
• Delivery Partnership Integrated delivery partnership covering Engineering & Design, Construction, Testing & Commissioning, Operations & Maintenance, and Ownership & Lifecycle Asset Management (Phases 04-08). Symphony provides a single point of accountability for the critical path to grid connection through detailed design, construction, testing, commissioning, and into operations, maintenance and lifecycle asset management.
• EPC + Operations Partnership Hybrid commercial partnership combining a standard EPC contract for Engineering & Design, Construction, and Testing & Commissioning with a separate services agreement or partnership for Operations & Maintenance, plus optional ownership buyback when capital recycling suits. Designed for clients seeking a clear EPC contracting structure with operations support.
• Discrete Grid Connection Services Standalone grid connection services available outside the three partnership models, including concept and grid strategy support, grid connection application leadership, TNSP stakeholder management, EPC services, and complete maintenance solutions delivered by Symphony's in-house workforce.

Quantifiable outcome

• 11.7 GW+ of grid connections managed
• +3 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability4 records

Feature3 records

Partnerships

One partnership is on record.

• Intellimation.aicoreTechnology or Integration · 11 November 2025Intellimation.ai's P.R.I.M.E. Brokerage AI Agents are available on the Symphony Market Place, providing automation tools for financial institutions to manage workflows across pre-trade and post-trade operations. The AI agents aim to reduce manual errors, increase transparency, and accelerate processes through integration with Symphony's secure messaging platform.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Zinfra: Australian infrastructure services provider for utilities and renewables, delivering HV construction, powerline, and O&M services across NEM regions. Owned by APA Group, with comparable specialist capability.
• Consolidated Power Projects Australia (CPPA): Specialist HV substation and BOP EPC contractor in Australia delivering grid connections for wind, solar, and BESS projects. Most direct comparison to Symphony's RJE-led substation capability.
• Beon Energy Solutions: Australian HV infrastructure and renewable energy connection specialist owned by ENGIE. Delivers substations, powerlines, and BESS connections across the NEM — directly comparable customer base and service offering.
• Elecnor Australia: Subsidiary of Spanish Elecnor Group delivering HV transmission, substations, and renewable grid connections across Australia. Comparable customer base and BOP delivery scope.
• Service Stream: ASX-listed Australian utility infrastructure services provider delivering power, gas, and telecommunications connections. Provides HV infrastructure, maintenance, and connection services to NEM utilities.

Broad incumbents

• Downer EDI: Large ASX-listed Australian infrastructure group with significant HV substation, transmission line, and renewable energy EPC capabilities across utilities and renewables. Broader portfolio but overlapping core service lines.
• UGL Limited: Australian infrastructure EPC delivering rail, power, and HV electrical works including substations and transmission. CIMIC-owned, broader portfolio, but competes directly in HV connection delivery.
• Monadelphous Group: ASX-listed Australian engineering and infrastructure services group with significant HV electrical, renewables, and resource-sector infrastructure delivery. Broader portfolio, overlaps on grid connection EPC.
• TransGrid: NSW-regulated transmission network service provider owning and operating the HV transmission backbone. A regulated incumbent counterpart whose decisions gate Symphony's customer connection pathways.
• Clough Limited: Australian engineering and project delivery contractor (Webuild-owned) with HV electrical, infrastructure, and energy transition capabilities. Broader portfolio but competes for grid connection projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/symphony-infrastructure-partners

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries5 records

Funding overview

Funding rounds2 records

Investors2 records

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 Symphony