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Apr '26
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Pursue Excellence with Us
Are you a highly motivated individual who strives to make each day better than the last? Do you embrace challenges and value the opportunity to grow both personally and professionally? If so, Sternfenster could be the perfect place for you.
We’re proud to have achieved Platinum Investors in People (IIP) status – joining just 2% of organisations worldwide to reach this prestigious level. This recognition reflects the dedication, innovation, and teamwork that drive everything we do.
But for us, Platinum isn’t the finish line. Continuous improvement is part of our DNA – we’re always finding new ways to strengthen engagement, communication, and empowerment across every area of the business. Join us and be part of a team that never stops raising the bar.
Your Future, Our Commitment
As a family-run business, we’re proud to have been recognised with prestigious awards, including Family Business of the Year and Product Supplier of the Year, reflecting the hard work of our dedicated team and the trust of our valued customers.
Our commitment to fostering an inclusive, supportive workforce has earned us recruitment accolades such as the Neurodiversity Award, Workforce Developer of the Year, and the G24 Training Initiative Award. These achievements highlight our focus on creating opportunities for everyone.
We’re proud to hold the prestigious Investors in People Platinum accreditation – the highest level of recognition for people management and development. This achievement reflects our unwavering commitment to valuing, supporting, and empowering our team as the foundation of our success.
When you join Sternfenster, you’re not just joining a company – you’re becoming part of an award-winning, people-first culture where your growth, wellbeing, and achievements truly matter.
What You Can Expect as a Sternfenster Employee
At Sternfenster, our people are at the heart of everything we do. Joining our team means becoming part of a supportive and forward-thinking environment where your contributions are valued, and your potential is nurtured. We’re committed to fostering a workplace where everyone feels inspired, empowered, and recognised for their dedication and hard work.
Regular reviews at all levels provide an opportunity to reflect on your achievements, align with your goals, and discuss areas for growth. These sessions are designed to support your development and ensure the value you bring to the team is acknowledged.
We believe in never standing still. Our continuous improvement culture ensures we’re always looking for ways to innovate, enhance processes, and create a better workplace. Your insights and ideas play a key role in driving these improvements and shaping our success.
We encourage open communication and the freedom to challenge and share ideas at every level of the business. Whether you’re working on the factory floor or in management, your contributions matter, and constructive feedback is welcomed as part of our shared commitment to growth.
Our Reward and Recognition schemes celebrate outstanding contributions across the team. Whether you’re acknowledging a colleague’s exceptional effort or being recognised yourself, we champion a culture of appreciation where no achievement goes unnoticed.
Your learning and development are shaped by you, with opportunities tailored to meet your ambitions. With our support, you’ll have access to the tools and encouragement needed to reach your full potential and achieve your goals.
Join an Award-Winning Team at Sternfenster
At Sternfenster, we’re proud to be recognised for our excellence in both the glazing industry and our commitment to our people. With certifications like BSI, IIP, and FENSA, we consistently deliver high-quality products and exceptional service you can rely on.
Our dedication extends beyond our industry, as we actively support the economy by partnering with UK suppliers whenever possible. From our cutting-edge 80,000-square-foot factory in Lincoln, we manufacture and supply thousands of frames nationwide, ensuring quality and innovation at every step.
As pioneers in the industry, we were the first UK fabricator to adopt the seamless welder from Graf Synergy, setting new standards in uPVC manufacturing. Join us and become part of a team that values excellence, innovation, and community impact.
Hear from Our Team
Don’t just take our word for it – hear firsthand what it’s like to be part of the Sternfenster family from the people who know it best.
Our team members share their experiences, showcasing what makes working at Sternfenster special – from our collaborative culture to the opportunities for personal and professional growth.
Let their stories give you a glimpse into the rewarding careers that await you at Sternfenster.
Sam Willerton – Production Executive Assistant
Colin Todd – Expert Glass Cutter
Shaun Cannon – Production Manager
Martha – Door Line Cleaner
Kev Wallis – Senior Trade Engineer
Vic Holland – Customer Service Team Leader
Our Stenfenster Family Principles
At Sternfenster, our family principles form the backbone of our organisation, driving our commitment to teamwork, integrity, and excellence in every area of the business.
Leaders Values
- Dynamic Drive and Determination
- Self Assurance
- Just Do It!
Team Values
- Perform for Our Customers
- Work Together
- Be the Best
Daily Focus
- Make Tomorrow Better than Today
- Work Smart as Well as Hard
- Be Effective, Efficient and Right First Time
Over 50 Years at Sternfenster
WIN BIG TODAY!
uPVC
We are a proud supplier of award winning Deceuninck uPVC windows and doors.
Market Leading Profiles
With Deceuninck uPVC windows and doors, we can manufacture products suited for a vast range of residential and commercial projects. As a Sternfenster Approved Installer, you’ll be able to fit high-quality Deceuninck windows anywhere in the UK.
High Performance Solutions
Award Winning Colour Range
BECOME A STERFENSTER APPROVED INSTALLER
Install market leading uPVC Deceuninck windows with the full support of industry leaders Sternfenster.
Aluminium
Our long standing partnership with SMART Systems enables us to offer a wide range of high quality aluminum windows and doors.
Modern Profiles
Aluminium is not only inherently strong and secure, it can easily be structured into styles to suit any UK project. We can supply contemporary modern profiles for homeowners along with shop fronts and large patio doors for the commercial sector.
Fully Customisable
JOIN OUR NETWORK & INSTALL SUPERIOR ALUMINIUM WINDOWS & DOORS
SIGN UP
DoorCo Composite Doors
We are constantly innovating and pushing industry boundaries with our partners at DoorCo.
Enhance Your Sales
Our key supply partners DoorCo are always pushing the boundaries with innovative new door technology. With our reliable supplier, we’re able to deliver the quality our customers have come to expect of us over our 50 years in business.
Advanced Thermal Performance
EXPLORE GRIPCORE
Discover More
Express your interest in joining our award-winning company below
CAREERS AT STERNFENSTER
Start Selling Sternfenster Today
Get in touch today with enquires for any of our market leading products. Sell the best with Sternfenster.
Become An Approved Installer
Grow your business with an award winning manufacturer. We’ll support you with materials and expert guidance every step of the way.
Outsource Fabrication To Sternfenster
Looking to outsource for any of your projects? Get started today. We will provide you with expert guidance for your trade success.
