Technical Senior SIPP Administrator

Technical Senior SIPP Administrator – HMRC Reporting & Transition Support (Contract)
Contract Details
Contract Length: 6 months

Rate: Competitive day rate (DOE)
Location: Fully Remote (UK-based required)

Overview
We are supporting a growing financial services organisation seeking an experienced Senior SIPP Administrator to provide specialist support during a key operational period.

This role combines hands-on SIPP administration, HMRC reporting expertise, and knowledge transfer responsibilities, making it ideal for a technically strong contractor who can deliver immediate impact while supporting long-term capability within the business.

Role Purpose
To deliver high-quality end-to-end SIPP administration across a complex portfolio, while taking ownership of HMRC reporting obligations, technical oversight, and structured handover to the internal team.

Key Responsibilities
SIPP Administration & Case Management

Oversee full lifecycle administration of SIPPs, from onboarding through to ongoing servicing
Process contributions, transfers (in/out), crystallisations, and benefit payments
Manage drawdown activity, including pension payroll calculations
Take ownership of complex, non-standard, and high-value cases
Ensure all activities are completed accurately, efficiently, and in line with FCA and HMRC requirements HMRC Reporting & Tax Compliance

Prepare and submit Event Reports, including benefit crystallisation and other reportable events
Complete Accounting for Tax (AFT) returns, including calculation and reporting of scheme tax charges
Manage and submit Relief at Source (RAS) claims within required timelines
Complete and maintain Pension Scheme Returns (PSR)
Monitor and report on lump sum allowances and post-LTA regulatory requirements
Support reporting requirements for overseas transfers (QROPS) where applicable
Ensure all HMRC submissions are accurate, timely, and compliant with current legislation Technical Oversight & Quality Assurance

Act as a subject matter expert on SIPP regulation and pension tax rules
Review and check work completed by team members to ensure accuracy and compliance
Provide technical guidance on complex cases and regulatory interpretation
Maintain up-to-date knowledge of pension legislation and HMRC changes Client & Stakeholder Management

Liaise with clients, advisers, and third parties to resolve queries efficiently
Maintain high service standards and clear communication across stakeholders
Support resolution of complex or escalated issues Process Improvement

Identify opportunities to improve operational efficiency and controls
Assist in enhancing internal processes and documentation
Support consistent delivery of high-quality administration across the team Knowledge Transfer & Transition Support (Key Focus)

Train internal pensions team on SIPP processes, HMRC reporting, and best practices
Document procedures, workflows, and technical requirements
Support a structured handover of responsibilities to the permanent team
Act as a subject matter expert during transition, ensuring continuity and confidence in ongoing administration
Contribute to building a sustainable, scalable internal SIPP function Candidate Profile

Essential

5+ years’ experience in SIPP administration (end-to-end lifecycle)
Strong working knowledge of HMRC pension reporting (Event Reports, AFT, RAS, PSR)
Proven experience handling complex pension cases independently
Strong understanding of UK pension legislation and regulatory requirements
High level of accuracy and attention to detail
Ability to work autonomously in a remote environment Desirable

Experience supporting team training, mentoring, or transitions
Exposure to scheme implementations or internalisation of pension services
Professional qualifications (CII, PMI, or equivalent) Why Apply?

Immediate contract with a well-regarded organisation
Fully remote
High-impact role combining technical, operational, and strategic input
Opportunity to shape and support a long-term internal pensions capability