At a Glance
- Tasks: Lead the SIOP process, aligning demand, supply, and inventory for our MRO business.
- Company: Join Ontic, a thriving community in aerospace and defence manufacturing.
- Benefits: Enjoy competitive pay, growth opportunities, and a culture of empowerment.
- Other info: Be part of a recognised workplace where innovation and collaboration thrive.
- Why this job: Make a real impact in a fast-paced environment with ambitious growth plans.
- Qualifications: Experience in SIOP, demand planning, and strong analytical skills required.
The predicted salary is between 60000 - 75000 £ per year.
Ontic, a leading licensor and manufacturer of complex engineering parts for the global aerospace and defence industries, is now recruiting for a SIOP Manager to lead the end-to-end Sales, Inventory & Operations Planning process within our MRO business. This is a key role, responsible for aligning customer demand, operational capacity, inventory strategy, and financial objectives through a structured, data-driven planning cycle.
We are seeking an experienced, analytical and collaborative SIOP Manager to lead and continuously improve the SIOP process within our MRO environment. This role is accountable for bringing together demand, supply, inventory, operational capacity, and financial planning to support clear, informed decision-making. Working cross-functionally with Sales, Operations, Planning, Supply Chain, Engineering, Programmes, and Finance, the SIOP Manager will improve forecast accuracy, strengthen planning discipline, and help balance service levels, cost, inventory investment, and operational efficiency. The SIOP Manager will operate at both a strategic and operational level, translating business priorities into structured planning processes, clear governance, and actionable plans.
Key Responsibilities:
- Lead and manage the SIOP cycle across monthly and quarterly planning cadences, ensuring consistent execution across demand planning, supply planning, reconciliation, and executive review.
- Consolidate and validate demand inputs from customer contracts, forecasts, historical trends, and commercial opportunities, challenging assumptions to ensure plans are realistic, data-driven, and aligned to business strategy.
- Oversee alignment of supply plans with demand and operational capacity, ensuring visibility of constraints, risks, and opportunities, and driving corrective action where performance is off track.
- Define and manage inventory strategies across key MRO categories, balancing inventory investment with service levels, risk, and working capital objectives.
- Track and report performance against plan, including forecast accuracy, service levels, inventory turns, and other key SIOP metrics, developing dashboards and reporting frameworks to support operational and executive decision-making.
- Provide key planning inputs into budgeting and financial forecasting cycles, ensuring SIOP outputs are aligned with financial plans and supporting scenario planning and trade-off decisions across cost, revenue, inventory, working capital, and service performance.
- Facilitate cross-functional decision-making, lead executive SIOP reviews, and continuously improve SIOP processes, governance, tools, reporting standards, and ways of working.
About You
At Ontic, our culture is integral to how we deliver success. We’re looking for someone who not only brings the right experience but who will thrive in a culture of recognition, empowerment, and accountability.
To be successful in this role, you will bring:
- Strong experience in SIOP, S&OP, demand planning, or supply chain leadership within an MRO, aviation, aerospace, or complex manufacturing environment.
- Deep understanding of integrated business planning, including demand, supply, inventory, and financial alignment.
- Experience managing complex demand streams and long-lead supply chains.
- Strong analytical capability, with experience in forecasting, scenario modelling, and performance reporting.
- Proven ability to influence and align senior stakeholders across multiple functions.
- Experience driving process standardisation, governance, and continuous improvement.
- Strong commercial awareness and the confidence to challenge assumptions constructively.
- A structured, data-driven approach to planning, decision-making, and performance management.
You will also have:
- Experience developing dashboards, reporting frameworks, and SIOP performance metrics.
- Strong proficiency in Excel and planning/reporting tools.
- The ability to translate complex data into clear insights, risks, and recommendations.
- A continuous improvement mindset, with a focus on simplification, efficiency, and better business outcomes.
- The confidence to operate at both strategic and operational levels.
Best Place to Work
We are more than the sum of our parts — and we’ve been recognised for it:
- Ranked #9 in Best Companies’ Q3 leaderboard for Best Manufacturing Company.
- 72.5% of employees in our 2023 survey said they are proud to work at Ontic.
- We’ve experienced rapid growth, doubling in size in recent years.
No day is the same at Ontic. Our success comes from empowering our colleagues to create opportunity, fostering an environment of autonomy where we ask for forgiveness, not permission.
Our Values
Our values are intrinsic to everything we do:
- We share a common sense – a global family of specialists with a shared passion for precision.
- We have the freedom to choose – challengers and innovators who think differently.
- We create the opportunity – change-makers with a clear direction and can-do spirit.
We are a fast-paced business with ambitious growth plans; so if you are dedicated, enthusiastic and always seeking ways to improve, you'll enjoy a career with us!
SIOP Manager in Tewkesbury employer: Ontic Engineering and Manufacturing, Inc.
At Ontic, we pride ourselves on being more than just a workplace; we are a thriving community of innovators dedicated to excellence in the aerospace and defence industries. Located in Tewkesbury, Gloucestershire, we offer a dynamic work culture that empowers employees through recognition, autonomy, and continuous improvement, ensuring that every team member has the opportunity to grow their career while contributing to meaningful projects. With a strong commitment to employee satisfaction, as evidenced by our high survey ratings, Ontic is an excellent employer for those seeking a rewarding and impactful role in SIOP management.
Contact Details:
Ontic Engineering and Manufacturing, Inc. Recruitment Team
StudySmarter Expert Advice🤫
We think this is how you could land SIOP Manager in Tewkesbury
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We think you need these skills to ace SIOP Manager in Tewkesbury
Some tips for your application 🫡
Show Off Your Technical Skills:When applying for the aerospace engineering role at Ontic Engineering and Manufacturing, Inc., make sure to highlight your technical expertise. Include specific software skills, like CAD tools or simulation software, and any relevant engineering projects you’ve worked on. This is your chance to really shine and showcase your engineering toolkit!
Don't Skip Your Projects!:Include a section in your CV dedicated to projects that demonstrate your problem-solving abilities in aerospace engineering. Whether it's a university project, an internship, or personal work, we love seeing how you’ve applied your skills in real-world scenarios. Make it clear what your role was and the impact of the project.
Show Your Passion in Your Cover Letter:At Ontic Engineering and Manufacturing, Inc., we're not just looking for skills – we want to know why you’re passionate about aerospace engineering. Use your cover letter to express what excites you about aviation technology and your career goals. Share any relevant experiences or inspirations that have led you to apply for this full-time position.
Tailor Your CV for Aerospace:Make sure your CV is specifically tailored to aerospace engineering. Focus on your education, any certifications, and your work experience, ensuring you highlight aspects that relate directly to the role. Don’t forget to mention any internships or apprenticeships that have given you hands-on experience.
How to prepare for a job interview at Ontic Engineering and Manufacturing, Inc.
✨Brush Up on Your Technical Knowledge
Aerospace engineering is all about technical precision, so make sure you’re comfortable with key concepts like aerodynamics, propulsion, and materials science. We recommend going through any relevant coursework or projects you’ve worked on – these real-world examples can illustrate your understanding during the interview with Ontic Engineering and Manufacturing, Inc..
✨Showcase Your Projects with Confidence
Make sure to have a portfolio ready that details any significant projects you've worked on, whether it’s a group assignment or a personal endeavour. Be prepared to discuss the challenges you faced, the tools you used, like CAD software, and what you learned from the experience, as this will show your problem-solving skills in action.
✨Prepare for Technical Interviews
Expect some technical questions or even problem-solving exercises during your interview with Ontic Engineering and Manufacturing, Inc.. Get familiar with design challenges or theoretical problems related to aerospace; this can range from calculating lift and drag forces to materials selection under stress. Practising these can help you feel more at ease when faced with tricky questions.
✨Emphasise Your Passion and Teamwork Skills
As a full-time candidate, it’s crucial to convey your passion for aerospace engineering and your ability to work in teams. Highlight any group projects or internships you've done, focusing on how you collaborated with others to achieve a goal. Companies like Ontic Engineering and Manufacturing, Inc. love seeing candidates who not only have technical skills but also fit well within their team culture.
