Job Description

At Thalia, we're looking for a Principal Process Engineer to join our senior site team and drive excellence across our operation at Allerton Waste Recovery Park. This is a career-defining opportunity for a chartered engineer with a flair for optimisation, a deep technical background, and the ability to influence and collaborate across diverse functions.

The Role

As Principal Process Engineer, you'll be the technical authority on process performance across your site - leading root cause analysis, influencing capital project design, and driving operational sustainability. You'll also play a pivotal role in process safety, performance reporting, regulatory support and innovation. This is a visible, strategic position where your engineering insight directly informs decision-making, investment cases and continuous improvement at scale.

Location: Allerton Waste Recovery Park, Moor Lane, Knaresborough, HG5 0SD

The Role

Be the site expert in process technology and performance. Optimise plant operations for cost-effectiveness, stability and sustainability. Investigate and resolve process-related issues through root cause analysis. Lead the development and ownership of Process Safety Management and Management of Change. Translate data into performance planning, improvement actions and business insight. Collaborate with stakeholders across operations, maintenance, compliance and procurement.

The Person

You are a chartered engineer with: Experience as a Principal Engineer in an operational setting. Hands-on understanding of risk management, process control, and unit operations. A pragmatic mindset, able to solve complex problems and communicate technical issues clearly. Strong analytical, interpersonal and planning skills. An ability to draw insight from other sectors and apply it to waste and energy operations.

Benefits

Entry into Company bonus scheme - up to 10% Contributory pension up to 8% Private medical cover (single) Company car or car allowance (493 per month) 25 days annual leave Annual opportunity to buy additional annual leave (up to 5 days) Life assurance: 4 x annual salary Flexible benefits: Access to a wide range of flexible benefits through Bravo Benefits, allowing you to tailor your package to suit your individual needs, including health, wellbeing, and lifestyle options. Free parking

#LI-LM1



Our Business

At Thalia Waste Management, we are creating a future to be proud of. We think differently, questioning everything, enabling us to develop progressive waste into energy solutions and services. Being motivated, tackling problems together, inspiring others to take responsibility, making a difference, being ambitious and contributing value.

We operate the best technology available across our four strategic sites in North Yorkshire, Milton Keynes, Cambridgeshire and the Isle of Wight. Our technology includes everything from mechanical and biological treatment, traditional mass-burn energy from waste and material recycling technologies to in-vessel composting, advanced thermal treatment, innovative small-scale energy from waste and anaerobic digestion. In a single year we process 300,000 tonnes of waste that is turned into energy. This generates the same amount of energy as approximately 600 million solar panels. Similarly we recycle circa 95,000 tonnes of waste.



Inclusion

At Thalia Waste Management, we work hard to make sure we are an inclusive and diverse place to work. This means we don't just look at your CV, we're focused on who you are, your skills and passion that can be brought to Thalia Waste Management. We know and understand the everyone is different and has a life outside work, so we're happy to discuss flexible working and any adjustments that could be needed! We'll do all that we can to support everyone from their first contact with us. For any support or adjustments needed through our recruitment process, please speak to our recruitment team who will be happy to support. We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. As a Disability Confident Employer, we will make sure that individuals with disabilities are provided reasonable adjustments to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment.