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Business Details
Trusted Marine Civil Engineering Solutions in the UK
Southbay Civil Engineering has established itself as a leader in marine and heavy civil engineering construction. With decades of collective experience, our team delivers technically demanding projects in challenging environments, combining economic efficiency with rigorous safety standards. Our expertise spans river and coastal works, reinforced concrete structures, and flood defences, supported by ISO 9001, ISO 14001, and ISO 45001 certifications. We maintain long-term partnerships with major clients, including the Port of Tyne and Bouygues Travaux Publics, and have completed projects valued up to 20 million. Our commitment to innovation and quality is evidenced by our RoSPA Gold Medal for Occupational Health and Safety, awarded for nine consecutive years.

We operate an Integrated Management System accredited by UKAS through URS, ensuring compliance with the highest industry standards. Our directors bring over 150 years of combined experience in marine engineering, quay construction, and project management. We prioritise precise tidal project scheduling to meet deadlines without compromising quality. Our technical team has developed safety and environmental protocols that align with CHAS Elite, Constructionline Gold, and SSIP requirements. This combination of expertise, accreditation, and client-focused delivery positions us as trusted specialists in complex marine construction projects.
Services
Marine Construction Quay Repairs Coastal Works Reinforced Concrete Structures Flood Defences
Highlights and features
  • We have completed marine projects valued up to 20 million.
  • Our team holds nine consecutive RoSPA Gold Medals for safety.
  • We operate UKAS-accredited ISO 9001, ISO 14001, and ISO 45001 systems.
  • Our directors bring over 150 years of combined marine engineering experience.
  • We implement tidal project management to maintain programme precision.
Associations and certifications
  • ISO 9001
  • ISO 14001
  • ISO 45001
  • RoSPA
  • Achilles
  • CHAS Elite
  • Constructionline Gold
  • Avetta
  • Acclaim
  • SSIP
Services
Marine Construction
We deliver complex marine construction projects including quay walls, jetties, and coastal defences. Our expertise covers tubular piling, sheet piling, and cathodic protection systems. Projects incorporate tidal management challenges requiring precise scheduling to ensure quality and budget adherence.
Quay Repairs
Specialist quay repair services for major ports and harbours. We handle structural reinforcement, fendering systems, and concrete restoration. Our work maintains operational safety while addressing erosion and wear from maritime conditions.
Flood Defences
Design and construction of flood defence systems using steel piling and reinforced concrete. Projects include erosion control measures and sea wall repairs to protect infrastructure from tidal forces.
Reinforced Concrete Structures
Construction and repair of marine-grade reinforced concrete structures. Our capabilities include formwork, pouring, and finishing for jetties, piers, and coastal barriers requiring high durability.
Design & Build Contracts
Full lifecycle project delivery from initial design to construction completion. We manage all aspects including earthworks, drainage, and service integration for marine and civil engineering schemes.
People
Paul Stephenson
Managing Director
With over 30 years in heavy civils, Paul leads project delivery and client relations. He previously worked with national contractors before joining Southbay in 2006, specialising in river and coastal works.
Antony Ballantyne
Operations Director
Antony brings 30 years of global marine engineering experience. His expertise includes deep water structures, dredging, and large diameter drainage systems. He joined Southbay after two decades working overseas projects.
Graham Taylor
Operations Manager
Graham holds a BEng in Environmental and Civil Engineering with 20+ years managing marine, rail, and utility projects. He oversees site operations and contract management for complex schemes.
Adrian Haggart
Technical Manager
With 20 years in construction management, Adrian developed Southbay's safety and quality systems. He ensures ISO 9001 compliance and manages technical implementation across all projects.
Dwayne Francis
Health, Safety & Environmental Lead
Dwayne has 16 years of HSEQ experience, implementing safety protocols across marine and construction sites. He ensures compliance with industry standards and regulatory requirements.
Questions
What types of civil engineering projects do you specialise in?
We specialise in marine and heavy civil engineering projects including quay repairs, coastal works, reinforced concrete structures, and flood defences across the UK.
Are you accredited for quality and safety standards?
Yes, we hold ISO 9001, ISO 14001, and ISO 45001 certifications, along with CHAS Elite and Constructionline Gold accreditations.
What contract values do you typically handle?
We undertake contracts ranging from £5,000 to £20 million, with major projects including quay works for the Port of Tyne and offshore structures.
How do you manage tidal challenges in marine projects?
Our team implements precise project scheduling and tidal management strategies to maintain programme timelines while ensuring quality and safety standards.
Can you provide references from previous clients?
We maintain long-term relationships with clients including the Port of Tyne, A&P Tyne, and Bouygues Travaux Publics, with case studies available for review.