On behalf of UK Parliament, we are looking for a Senior Infrastructure Engineer (UC) - Voice (Inside IR35) for a contract until March 2027 (with potential for extension) based hybrid in London. The Unified Communications Team is a dedicated 3rd Line engineering capability and is responsible for managing, supporting, and evolving Parliament''s collaborative ecosystem, including core telephony services (VoIP, MS Teams Voice, and Contact Centres) and messaging services (Exchange Online, hybrid Exchange, mail security, compliance). The team sits under the Enterprise Technology directorate, under the Office of the Chief Technology Officer which supports Parliament in delivering its democratic mission by providing secure, resilient and innovative technology services that are user centred and strategically aligned. Enterprise Technology provides the foundations and core business platforms that Parliament relies on every day. The Role The Senior Infrastructure Engineer acts as a Subject Matter Expert and technical authority within this domain. You will deliver complex technical implementations, provide the final point of escalation for critical incidents, and drive the "Value Stream" approach, shifting focus from reactive maintenance to proactive service improvement. While this role has no line management responsibilities, you will be expected to raise the technical capability of the wider team through active mentorship and the definition of engineering standards. The post-holder is ..... full job details .....