Office Manager / Senior Administrator (with Bookkeeping Support) Location: York (Fully Onsite, 5 days per week) Salary: £32,000 - £40,000 per annum KO2 is proud to be working with one of our long-standing clients, a highly respected bespoke software company delivering complex, high-integrity software solutions for blue-chip businesses across the world. This is a fantastic opportunity to join a growing international organisation of around 50 people, where you will play a pivotal role at the heart of the business. As Office Manager, you will ensure the smooth day-to-day running of the office while supporting finance and operations teams with key administrative and bookkeeping tasks. The Role This is a broad, senior administrative position offering variety, responsibility, and long-term career potential. You will be the central point of contact for office operations, working closely with colleagues across the business and supporting senior stakeholders. No two days will be the same, and your contribution will have a visible impact on the efficiency and wellbeing of the whole company. The role is fully office-based in York, five days a week. Key Responsibilities Office Management & HR Support Oversee the smooth running of the office, including facilities, procurement, and insurance Coordinate HR-related administration such as absence tracking, holidays, and recruitment support Organise and book international travel for staff Act as front-of-house, managing visitors, phones, and general enquiriesFinance Support Support the Financial Controller with basic bookkeeping tasks Accurately process supplier invoices, expense claims, and company credit card transactions Maintain strong attention to detail when handling financial dataOperations & Logistics Support Assist with order delivery administration and day-to-day operational processes Prepare physical goods for shipment and track deliveries Produce delivery documentation including invoices, packing lists, and commercial paperwork Coordinate documentation, agreements, and records with customers and internal teamsWhat We're Looking For Essential Skills & Experience 5-10 years' experience in a general administration, office management, or senior admin role Exceptional organisational skills and attention to detail Proactive, motivated, and confident taking ownership of responsibilities Strong Microsoft Office and general IT skills Comfortable juggling multiple priorities simultaneously Excellent interpersonal skills with the ability to build rapport across all levels Good GCSEs / A-Levels, including maths Desire to grow with the role and develop long-term within the businessDesirable Experience supporting finance or bookkeeping tasks Exposure to financial or accounting software Experience booking international travel Background in a small or medium-sized business where roles are broad and hands-onWhy Join KO2's Client? You'll be joining a friendly, collaborative, and technically passionate team with an innovative culture. The company delivers software that supports safer, greener technologies and works with organisations shaping the future of low-carbon systems, autonomous vehicles, and advanced engineering solutions. This is a long-term opportunity for someone looking to build a meaningful career as an Office Manager within a growing international software business. If you're an experienced administrator who thrives on responsibility, variety, and being the glue that holds a business together, we'd love to hear from you. Apply now or contact KO2 for more information