First, a clarification: there is no major theme park simply named "Oakwood Theme Park." You are likely referring to Oakwood Theme Park (formerly Oakwood Leisure Park) in Pembrokeshire, Wales, UK.
Oakwood Theme Park employs over 300 staff members during its regular operating season. This number can increase significantly during peak periods (summer holidays, Halloween events, etc.) when seasonal workers are hired for ride operations, hospitality, retail, and entertainment.
For the most current figures or job openings, check Oakwood’s official website or careers page.