Public Digital partners with LeftBrain to simplify ISO 27001 success and build client confidence

Public Digital is a transformation consultancy working with leading organisations across the world across multiple sectors, helping them adapt how they work so they can respond more effectively to change. Growing rapidly in recent years, Public Digital wanted to make sure that they could demonstrate that they are following best practice for the management and protection of information.

Already working with LeftBrain for technology support, Public Digital turned to us for help to navigate ISO 27001 accreditation. We guided them through what can often be an incredibly complex process, making it clear and achievable. With our help and contributions from across their team, Public Digital secured ISO 27001 accreditation within six months.

“ISO 27001 was a logical next step on our journey and was a priority for us. We turned to LeftBrain because of their existing relationship supporting our technology and their experience helping other organisations through the ISO 27001 process.”

The Challenge

Scaling securely while meeting client expectations

Public Digital has grown quickly, with a team that is now around 100 people and with clients who span governments, charities, global institutions and businesses across the commercial sector. Their Cyber Essentials Plus accreditation provided a solid foundation for the security of their systems, but they wanted to demonstrate a higher level of assurance across the whole lifecycle of managing information. Aligning with an internationally recognised standard also supports the growth of Public Digital’s global business.

With such a diverse client base, Public Digital required a governance and risk management framework that could satisfy even the most stringent client requirements. ISO 27001 was the natural choice.

“Making sure we are managing information well is really important, especially as a growing business. Clients need to know they can have confidence in us. The breadth of ISO 27001 provided a clear framework and helped us make sure we’d considered all aspects thoroughly.”

The Solution

Strategic: A framework that works for growth

Because LeftBrain was already a trusted technology partner, Public Digital turned to us for support. ISO 27001 was framed not as a tick-box exercise but as a way to strengthen governance and demonstrate consistent assurance across their varied client portfolio. It provided a foundation for both trust and long-term growth.

“ISO 27001 was never about pinning a certificate on the wall. For us, it was about embedding the right practices across the business, maintaining the collaborative culture that is fundamental to how we work, and giving clients the confidence they need.”

Tactical: Creating living documentation

LeftBrain brought proven toolkits, structured guidance, and experience working directly with accredited auditors. Working alongside Public Digital’s internal team, we transformed ISO 27001 from a static compliance exercise into a dynamic, accessible system.

Instead of relying on spreadsheets and files tucked away in folders, the Information Security Management System was built in Notion. Every clause was linked to the relevant documentation, risks, and controls, making it simple for the team to surface the right information at the right time. This linked with the policies and processes that Public Digital developed so everything was easy to navigate, relevant to the business and ready to demonstrate thorough practices when the time came for the audit to happen. With this approach, Public Digital achieved certification in just six months.

The results speak for themselves

• ISO 27001 certification achieved in just six months
• A smoother accreditation process with minimal friction
• Clear registers and records now embedded into day-to-day operations
• Increased client confidence with visible proof of security maturity
• Strong organisational culture around information management