Freelance Principal Structural Engineer (Outside IR35)
Location: London / Hybrid
Contract: Long-Term Freelance
IR35 Status: Outside IR35
Day Rate: Competitive (DOE)
Sector: Infrastructure / Energy / Major Projects
We are working with a leading engineering consultancy delivering complex infrastructure and energy projects, and we are looking to engage an experienced Principal Structural Engineer on a freelance (Outside IR35) basis.
This role is ideally suited to a chartered structural engineer with a strong background in major infrastructure, high-risk structures, and multidisciplinary design environments .
Key Responsibilities:
- Lead structural design and analysis across complex projects from concept through to detailed design
- Take ownership of RC and steel design , including seismic and fatigue considerations
- Act as Technical Lead / CRE / Design Reviewer on key project packages
- Develop and review advanced structural models (ETABS, Robot, GSA, LUSAS etc.)
- Deliver foundations, substructures, heavy civils, and building structures
- Collaborate with multidisciplinary teams across rail, energy, and large-scale developments
- Ensure compliance with Eurocodes and project-specific standards
Requirements:
- Chartered Engineer ( CEng MICE or equivalent )
- Proven experience operating at Senior / Principal level within consultancy environments
- Strong background across infrastructure, transport, or energy projects (e.g. HS2, substations, metro, large developments)
- Demonstrated experience with advanced structural analysis tools (ETABS, Robot, GSA, etc.)
- Experience in design for seismic and complex loading conditions highly desirable
- Ability to act as Responsible Engineer / technical authority
- Must operate via a UK Limited Company (LTD)
- Must have the right to work in the UK
Desirable Experience:
- Experience on high-risk buildings or regulated infrastructure projects
- Background in substation, power, or rail projects
- Exposure to international design codes (ACI, EC, seismic codes)
What’s on Offer:
- Outside IR35 engagement with strong earning potential
- Opportunity to work on flagship UK and international projects
- Long-term contract visibility
- High level of technical ownership and autonomy
Apply:
If you are a Principal Structural Engineer available for your next freelance assignment, or planning ahead, please get in touch or apply directly via LinkedIn with your CV.
