Carmichael UK is recruiting an experienced Assistant Design Manager to support delivery on a major HS2 infrastructure package based in Buckinghamshire. This is a freelance opportunity to join a high-performing design and delivery team on one of the UK’s most significant rail infrastructure programmes, working across complex civil engineering works. The Role As Assistant Design Manager, you will support the coordination, management, and assurance of permanent works design, working closely with designers, construction teams, and client stakeholders. You will be involved in readiness review meetings, DDRs and IDRs within your area of responsibility, coordinating the delivery of typical sections, standard detail drawings, and supporting design documentation. The role will include day-to-day coordination of design activities, including verification, technical reviews, and interdisciplinary checks. You will also manage third-party design reviews, including Cat 3 checks, and work closely with construction teams to ensure designs are buildable and aligned with the construction programme. Key Responsibilities Supporting and coordinating design delivery across allocated work packages Managing DDRs, IDRs, and readiness reviews Coordinating design assurance activities, including verification and technical review Liaising with Cat 3 checkers and third-party reviewers Ensuring designs are buildable and aligned with construction sequencing Managing technical and commercial communications (TQs, EWs, EIs, CEs) via CEMAR Coordinating with interfacing organisations and HS2 technical teams Maintaining technical registers, including assumptions and departures Supporting MIDP technical deliverables and attending client, designer, and JV meetings About You Degree-qualified in Civil Engineering or Construction Management Experience in a similar Assistant Design Manager or design coordination role Background in major civil engineering or infrastructure projects Strong understanding of design assurance and technical governance processes Confident using MS Office and managing multiple workstreams Strong communication skills and ability to build effective working relationships Understanding of HS2 Act requirements or similar major project frameworks (preferred)