Planning Assistant

Location:

Onsite, Portsmouth, Hampshire Competitive Salary + Excellent Benefits

Job Title:

Planning Assistant

Join Harwin's Growing Manufacturing Team

Harwin is a Portsmouth-based, family-owned precision engineering company with a global reputation for quality, innovation, and reliability. As we continue our ambitious growth journey, we’re investing heavily in new technologies, digital transformation, and the development of a state-of-the-art manufacturing facility in Portsmouth.

We are now looking for a Planning Assistant to join our Production Planning team. This is an exciting opportunity for either an experienced planning professional or someone looking to take their first step into a planning career within a successful manufacturing business.

As a Planning Assistant, you’ll play a key role in helping ensure our production operations run smoothly and efficiently. Working closely with Production, Procurement, Warehousing, and Logistics teams, you’ll help maintain accurate production plans, monitor performance, and support the delivery of customer requirements.

This role offers excellent exposure across the supply chain and manufacturing operation, making it an ideal position for someone looking to build a long-term career in planning.

• Supporting the creation and maintenance of daily, weekly, and monthly production schedules
• Updating planning systems with demand forecasts, production outputs, and capacity changes
• Monitoring adherence to production plans and identifying potential risks, constraints, or delays
• Liaising with Production, Procurement, Warehousing, and Logistics teams
• Supporting material availability checks and escalating shortages where required
• Communicating schedule changes to relevant stakeholders
• Helping to ensure customer demand is met effectively and efficiently

We’re open to applications from candidates at different stages of their career.

You may already have experience in Production Planning, Materials Planning, Purchasing, Supply Chain, or Inventory Control and be looking for your next opportunity.

Equally, this could be the perfect role for someone looking to move into planning for the first time. If you have experience working in a manufacturing, production, warehouse, logistics, or other demand-led operational environment, we’d love to hear from you.

Whether your background is in engineering, food production, chemicals, FMCG, packaging, pharmaceuticals, or another manufacturing sector, the key requirement is experience within an environment where production, stock, materials, or customer demand must be carefully managed.

• Experience working within a manufacturing, production, warehouse, logistics, supply chain, or other fast-paced operational environment
• Strong IT skills, particularly Microsoft Excel
• Excellent organisational skills and attention to detail
• Strong communication skills with the ability to work effectively across multiple departments
• A proactive and problem-solving mindset

• Previous experience in Production Planning, Materials Planning, Purchasing, Inventory Control, or Supply Chain
• A qualification in Supply Chain, Logistics, Business, Engineering, or a related discipline
• Knowledge of manufacturing processes, production scheduling, or capacity planning

• An experienced Planner, Materials Planner, Buyer, or Supply Chain professional looking for a new challenge
• Someone working in manufacturing, warehousing, logistics, production, or operations who wants to build a career in planning
• A candidate looking to develop analytical, commercial, and operational planning skills within a growing global manufacturer

• Competitive salary
• 25 days annual leave plus bank…