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    RSK Group–Octavius Infrastructure deal: integrated rail delivery lens for engineers

    November 24, 2025|

    Reviewed by Tom Sullivan

    RSK Group–Octavius Infrastructure deal: integrated rail delivery lens for engineers

    First reported on New Civil Engineer

    30 Second Briefing

    RSK Group has acquired rail and highways contractor Octavius Infrastructure from Sullivan Street Partners to expand its position in the UK transport infrastructure market. Octavius brings established frameworks with Network Rail and National Highways, covering rail renewals, station upgrades and complex bridge and structures work in constrained possessions. The deal signals more integrated delivery of geotechnical, civils and asset management services across major corridors, with RSK able to fold site investigation, environmental consenting and materials consultancy into multi-disciplinary transport programmes.

    Technical Brief

    • Acquisition structure involves RSK buying Octavius Infrastructure directly from private equity owner Sullivan Street Partners.

    Our Take

    Within the 39 Infrastructure stories in our database, UK-focused pieces are heavily weighted towards rail and road upgrades, so RSK Group’s move on Octavius Infrastructure signals an effort to secure a larger slice of that recurring transport workbank rather than one-off megaprojects.

    Most of the 94 tag-matched ‘Projects’ and ‘Contract Award’ items involve contractors scaling up via framework positions rather than outright M&A, so this acquisition route by RSK Group suggests a more aggressive consolidation strategy in the UK transport contracting tier.

    Sullivan Street Partners’ exit from Octavius Infrastructure via M&A fits a pattern in our coverage where UK mid-market infrastructure contractors are being recycled from private equity ownership into larger engineering groups, typically to bundle specialist delivery capability under broader multi-disciplinary platforms.

    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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