Outside IR35 Security Architect Contract Jobs

Security Architect contractors are engaged to design and govern the security architecture of complex technology environments, ensuring that security is embedded into the design of systems, applications, networks, and cloud infrastructure rather than added as an afterthought. The work involves developing security reference architectures, reviewing and approving the security design of major programmes and system changes, defining security standards and patterns, conducting threat modelling using frameworks such as STRIDE or PASTA, advising on the selection and implementation of security controls, and providing expert security guidance to technology and business leadership. Security Architects are brought in when organisations are undertaking major technology transformation programmes, when a security architecture capability needs to be established or strengthened, or when a specific system or programme requires dedicated security architectural expertise.

Security Architect contractors are expected to have both broad security domain knowledge and the technical depth to engage credibly across network security, identity and access management, application security, cloud security, and data security. Experience developing security architectures using established frameworks including SABSA, TOGAF with security extensions, or NIST CSF is expected at senior level. Deep knowledge of zero-trust architecture principles, cloud-native security design on AWS, Azure, or GCP, and the security implications of microservices, API-first, and container-based application architectures is widely expected as organisations modernise their technology estates. CISSP, CISM, CCSP, or equivalent security architecture certifications are well regarded and frequently required for senior Security Architect contract roles, particularly in financial services and government where formal qualification requirements are common.

Contract Security Architect work sits within a high-value specialist market within the cybersecurity contractor ecosystem, driven by the growing recognition that security architecture is a strategic design discipline rather than a compliance checkbox, and the shortage of architects who can combine security expertise with the breadth of technology knowledge needed to design security across complex hybrid and cloud environments. Financial services, central government, healthcare, and critical national infrastructure organisations are the most consistent buyers. The zero-trust architecture trend is creating particularly strong demand for Security Architects who can design and govern the identity, network, and endpoint security controls that implement zero-trust principles at enterprise scale. Rates are at the premium end of the cybersecurity contracting market, reflecting the seniority, breadth, and strategic impact of the role.

IR35 is UK tax legislation that determines whether a contractor is genuinely self-employed or working in a manner that resembles employment. When a contract is classified as outside IR35, the engagement is treated as a business-to-business arrangement. The contractor operates through their own limited company, invoices for services, and manages their own tax affairs including corporation tax, self-assessment, and VAT where applicable.

Outside IR35 engagements are assessed against three key factors: the degree of control the client exercises over how the work is delivered, whether the contractor has a genuine right to provide a substitute, and whether there is a mutuality of obligation between the parties. Contracts that demonstrate contractor autonomy, project-based delivery, and the absence of ongoing employment obligations are more likely to sit outside IR35. Since April 2021, responsibility for making this determination sits with the end client for medium and large private sector organisations.

On QualityContracts.co.uk, approximately 28% of roles with a stated IR35 status are classified as outside IR35. The proportion varies by sector and role type, with some disciplines seeing a significantly higher or lower share of outside IR35 opportunities. Each listing on this page displays its IR35 status where provided by the hiring organisation.

Security architecture sits at around 25% outside IR35 among contracts with a stated status. The advisory end of security architecture, producing threat models, designing security reference architectures, or assessing an organisation's security posture against a framework like NIST or ISO 27001, can support outside IR35 when scoped as a discrete engagement. Consultancies and organisations commissioning security architecture reviews ahead of major programmes or regulatory audits are the typical clients.

Contract rates for security architect roles typically range from £650 to £1100 per day, depending on the scope of the role, required expertise, and the delivery expectations of the engagement. Rates shown are for outside IR35 engagements and reflect the gross day rate paid to the contractor's limited company before any personal tax obligations.

Over the past twelve months, we have tracked over 200 security architect contract roles across the site. Of the roles currently listed on our site, around one in four are Outside IR35. Data reviewed up to March 2026.