Senior Penetration Tester

Company: Barclay Simpson

Location: London

Posted: May 20th, 2026

This is a fantastic opportunity for an experienced penetration tester to move into an internal role with a leading financial services firm. The role offers variety across Penetration Testing (WebApp, Infrastructure – internal and external, and Cloud) along with involvement in Purple Teaming and Red Teaming engagements.

The role will see you leading, scoping and planning engagements, defining methodologies and working with third parties and the wider cyber defence team where required. You will undertake peer reviews of reports, and will communicate findings to senior stakeholders in the business. You will have the opportunity to mentor a junior PenTester and to work on a range of different projects.

The successful candidate will be an experienced PenTester with WebApp, Cloud and Infra skills. You may be certified in OSCP, CREST or SANS (although certifications are not a prerequisite) and will have good verbal and written communication skills. Experience in red/purple teaming will be beneficial. You may have experience from either a consultancy or an internal team.

The role is based 3 days a week in the office. If you live in Surrey, West/East Sussex, Hampshire, Croydon, Brighton, Portsmouth or West Kent, you will be within a commutable distance of their office. There is parking available, and the office is just a 5-minute walk from the station with regular direct trains from London Bridge, Victoria and Blackfriars. Base salary up to £85,000 + benefits + bonus.

There is no visa sponsorship available at this time.

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