Octavius Infrastructure, previously the rail and highways department of the Geoffrey Osborne till its disposal in 2021, is now a part of RSK.
Octavius and its 700 workers will proceed to function below the management of leader govt John Dowsett, with Matt Smith and Gavin Pritchard proceeding as managing administrators for the rail and highways respectively.
The addition of Octavius marks a pivotal step for RSK within the shipping infrastructure sector, extending it from its consultancy roots into tier one major contracting.
Octavius recorded turnover of £322.9m for the yr to 31st March 2025 (2024: £276.7m) with pre-tax benefit emerging to £8.6m (2024: £4.7m).
RSK Staff became over £2,241m within the yr to fifth April 2025, up 21% over the former yr helped through 11 acquisitions all through the yr. On the other hand, it made a pre-tax lack of £124.5m and has now not made a benefit since 2017, focusing as a substitute on acquisitions to handle earnings enlargement.
RSK began out as an environmental engineering consultancy however to handle enlargement has moved all over in its acquisitions, from metal fabrication and drilling to lawn nurseries and public members of the family.

Octavius leader govt John Dowsett stated: “I’m very thinking about becoming a member of the RSK Staff and embarking at the subsequent degree of the Octavius adventure. Having thrived below the possession of Sullivan Side road Companions, increasing our functions, popularity, earnings and profitability, RSK feels just like the herbal long-term house for us to proceed our formidable enlargement plans.
“We can retain our proud Octavius logo and handle a robust stage of autonomy, whilst taking part in a wealth of fortify from the really extensive experience throughout the RSK Staff. We have now a robust cultural are compatible with RSK, with complementary strengths, and percentage a imaginative and prescient for formidable however sustainable enlargement, delivered with an unwavering dedication to the protection, well being and wellbeing of our folks and our surroundings. I’m having a look ahead to operating carefully with the RSK management workforce and our spouse companies to ship the Octavius imaginative and prescient of being essentially the most revered shipping infrastructure supplier.”
RSK founder and leader govt Alan Ryder stated: “I’m very proud to look Octavius, a prime quality and depended on spouse in the United Kingdom rail and freeway sectors, make a selection RSK as its long-term house. John and his workforce have constructed a exceptional industry, and I look ahead to operating with them as they proceed to guide Octavius thru many extra successes.”
He added: “Infrastructure is one among RSK’s core strategic enlargement markets and, in Octavius, we’ve discovered a big, well-established industry with a confirmed monitor file in safety-critical infrastructure supply. With many complementary companies already within the staff, we see important alternative for collaboration, additional making improvements to the price we will be able to convey to our shared consumer base.”
Layton Tamberlin, founding spouse of Sullivan Side road, stated: “Our adventure with Octavius has been an unbelievable one. From carving out the industry, to executing the natural enlargement plan and including further functions thru add-ons, the industry has been remodeled into a countrywide participant of substantial scale. It’s been a excitement operating with this very good control workforce all through our possession, and we’ve each and every self belief that Octavius will proceed to thrive as a part of RSK Staff.”
Present Octavius initiatives come with the refurbishment of Ryde Pier at the Isle of Wight and Waterloo Station roof, the development of latest railway stations at Okehampton and Charfield, the A46 Walsgrave junction improve, the development of a brand new hyperlink street in Colchester and of completion of the newly opened A140 Lengthy Stratton Bypass.
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