Principal Structural Engineer

United Infrastructure is a dynamic and rapidly expanding business, focused on delivering critical infrastructure projects, across the utility and social infrastructure sectors. Our team of highly skilled and hardworking specialists deliver innovative solutions to the complex challenges our clients face. Our company is split into two business areas:
Utility Infrastructure – Our team of Utility Infrastructure specialists design, build and maintain critical water, energy (gas), power and telecoms infrastructure, for the UK’s largest network owners and operators. Social Infrastructure
- Our team of Social Infrastructure specialists revitalise homes and communities by carrying out a wide range of work, from retrofit to refurbishment, and maintenance. Equal Opportunities Statement
- At United Infrastructure, we are committed to making every interaction a positive and inclusive experience. If there is anything we can do to support you, remove barriers, or make the process more accessible, please let us know — we want this to be the best possible experience for you.

UIPTD is seeking a Principal Structural Engineer to lead structural design and technical governance across our overhead line and substation structures portfolio, supporting EPC delivery for SSE, SPEN, NGED, and National Grid. The successful candidate will work closely alongside the incumbent team during a structured handover period to absorb corporate knowledge and technical authority. OHL structural experience (lattice towers, wood pole lines, or similar guyed/self-supporting structures) is strongly desired given how specialised this discipline is, but UIPTD will also consider candidates from adjacent structural disciplines — steel lattice/mast structures, telecoms towers, bridges, or other slender/dynamically-loaded structures — where the underlying engineering principles and analytical approach transfer well to OHL.

Full training and mentoring into OHL-specific practice will be provided where required.

• Act as the senior structural design authority for OHL lattice tower, wood pole, and steel pole structures across UIPTD's EPC portfolio
• Provide structural design authority for substation equipment support structures — gantries, busbar supports, plant support steelwork, cable sealing end structures
• Lead complex or non-standard structural assessments, including heritage/legacy tower types, uprating studies, and load reassessment for line refurbishment or reconductoring schemes
• Review and approve structural calculations and reports produced by senior and intermediate engineers within the team
• Set and maintain UIPTD's structural design standards, procedures, and calculation templates for OHL and substation structures
• Provide technical sign-off on structural elements of tender and PQQ submissions for OHL and substation framework contracts
• Represent UIPTD at client technical governance meetings on structural matters (SSE, SPEN, NGED, National Grid)

• Structural analysis and design of lattice towers, wood pole (single, H-pole, trident) and steel pole structures
• Tower/pole capacity studies for reconductoring, uprating, and line diversion schemes — assessing existing structures against revised loading
• Review of PLS-CADD / PLS-POLE structural outputs and integration with the wider OHL design process
• Structural input to feasibility studies and options assessments for new-build and refurbishment OHL schemes

• Structural design of substation gantries, busbar support structures, plant support steelwork, and cable sealing end structures
• Structural assessment of existing substation structures for plant replacement or uprating schemes
• Coordination with electrical and civil disciplines on substation structural interfaces

• Work directly alongside incumbent senior structural engineers during a structured handover period, to capture corporate knowledge, historic design precedent, and client-specific practice
• Mentor and technically supervise Senior and Intermediate Structural Engineers within the team
• Support recruitment, onboarding, and development of the wider…