NatWest has doubled down on its backing for Wales’ start-up scene with the appointment of Siwan Rees and Sam Sharkey as Acceleration Managers at the Cardiff Accelerator Hub. The move signals a major boost for entrepreneurs across the region, with the duo set to drive business growth and innovation in 2026 and beyond.
Siwan Rees, a first-language Welsh speaker from Blackwood, returns to NatWest after senior roles in the start-up sector, including as Commercial Director at a fast-growing EdTech firm and Programme Manager for the Business Wales Accelerated Growth Programme. Her hands-on experience scaling businesses, navigating new markets, and raising investment will be central to helping Welsh entrepreneurs take their next steps.
Joining her is Sam Sharkey, whose background spans marketing, business support, and a previous stint with NatWest in Plymouth. Sam’s fresh perspective and track record with the Accelerator Programme make him a strong addition to the Cardiff team.
The Cardiff Accelerator Hub is part of NatWest’s national Accelerator Programme, which has supported more than 10,000 entrepreneurs UK-wide. The programme offers free, year-round support including expert-led workshops, access to funding advice, and invaluable connections to business networks and partners. Local alumni like Finalrentals - a global car rental platform - and Darogan, which links Welsh employers with graduate talent, show the impact the programme is already having.
Siwan Rees said:
“Coming back to the NatWest Cardiff Accelerator Hub is a fantastic opportunity. "Having worked in the start-up world, I know how tough it can be for founders. I want the Hub to be a go-to place for support and opportunity for Welsh entrepreneurs.
“As a team we have strong connections in many important areas - like universities, government, policy makers, business, and both public and private sectors. These wide-ranging connections can help our customers access these resources, knowledge, and opportunities more easily which increases the chances of successful collaborations, support, and growth for the startups involved.”
Sam Sharkey added:
“I’m excited to get stuck in at the Cardiff Accelerator Hub. I’ve seen first-hand how much of a difference a supportive community can make, and I’m looking forward to helping businesses connect, learn and grow.”
The new team has wasted no time kicking off 2026 with a packed-out event for over 150 entrepreneurs. “Inside the Economy: 2026 UK Outlook” brought together business leaders, founders and local stakeholders across both Cardiff and Bristol Accelerator Hubs. NatWest Principal Economist Stephen Blackman shared insights on the UK economy - from labour market trends to the impact of big data - helping businesses gear up for the year ahead.
Pam Sheemar, NatWest’s Regional Accelerator Director, commented:
“Siwan and Sam bring real energy and expertise to our Cardiff Accelerator Hub. They’re passionate about supporting local businesses and will play a key role in driving growth and innovation across Wales. Events like ‘Inside the Economy’ are exactly the kind of opportunity we want to offer - giving entrepreneurs the tools, insights, and networks they need to succeed.”
NatWest is the biggest bank for businesses in Great Britain and a leader in supporting start-ups and SMEs. The Cardiff Accelerator Hub is open to entrepreneurs at all stages, offering free resources, workshops, and expert guidance. All NatWest Accelerator resources are accessible through the NatWest Accelerator App and in-person events, making business support easily available to entrepreneurs.
