Board of Directors

Prior expertise

James retired as a Managing Director at Numis Securities Ltd after 19 years during which time he advised a number of technology, media, healthcare and mining companies which were either admitted to trading on the Main Market of the London Stock Exchange or AIM. James has led many initial public offerings and secondary fundraises, including previous transactions for Mirriad, as well as advising on mergers and acquisitions and corporate governance issues. Previously James was a director of ABN AMRO Hoare Govett in various institutional sales roles.

Sector experience

James has a wealth of experience in helping publicly quoted companies make the most of their listings and liaising with investors.

Experience

Nic Hellyer brings over 30 years of financial and listed company experience to Mirriad, having held various senior banking, director and CFO positions. He has extensive tech company experience in both the UK and US, and is a former investment banker across a wide range of senior advisory roles including fund raising (IPOs and follow-ons) and M&A for growth companies, both public and private.

Experience

Joined the Board in July 2022. JoAnna has a depth of experience in the global advertising technology industry gained by holding executive leadership positions in operations, client services, marketing, and strategic partnerships. 

Prior expertise

JoAnna most recently served as Senior Vice President, Global Inventory at The Trade Desk.  Before joining The Trade Desk, JoAnna was Chief Operating Officer at OpenSlate ahead of its sale to DoubleVerify.  Prior to that, JoAnna held executive roles at Rapt (acquired by Microsoft), FreeWheel (acquired by Comcast), Adap.tv (acquired by AOL), and AOL (acquired by Verizon).

Sector experience

Advertising, media, technology, fundraising, change management, M&A, and business strategy.

External appointments

None.

Louis has been with Mirriad for 6 years and prior to becoming CEO headed up Mirriad Europe, overseeing the strong growth the region has seen over the last three years, driving this through increased sales, onboarding new key partners, and the strategic restructuring of contracts with other key partners. He was appointed to the Board on 25 June 2025