📍 Lenzkirch in the Black Forest | Part of the Testo Group
Career atTesto Sensor
This is where temperature probes for European market leaders are manufactured. Robust and built to last. Qualified in our own laboratory. Developed specifically to meet customer requirements and perfectly tailored to the application.
Whether you’re developing temperature probe solutions, optimising manufacturing processes or managing customer projects: you’ll be working on technically challenging solutions that have to perform in the field.
As part of a team of 65 colleagues in the Black Forest. And 140 in China.
Where people still know each other personally.
Where your ideas matter. Where you help shape the future.
Testo Sensor – the employer that suits your lifestyle
What sets Testo Sensor appart?
Small enough for real conversations, professional enough for market leaders
We supply leading European manufacturers in HVAC, mechanical engineering and professional household appliances. With our own laboratory, ISO certification, systematic FMEAs and 100% functional testing. But: in a team where you know everyone – from production to senior management.
What sets us apart:
- You help shape things – and we expect you to.
Your ideas aren’t just heard, they’re expected. Our webshop, for example: an employee idea. Various technical developments: they came out of the team.
- Real innovation
We build our own test benches when none exist. We implement new technologies such as laser welding. We develop qualification methods that go beyond the standards. Because our customers need them.
- Technical depth
You work with colleagues who know what they’re doing. Physicists in the laboratory, experienced design engineers, manufacturing specialists. No superficial “it’ll be fine” – precise solutions instead.
- Flat hierarchies, for real
First-name terms with everyone, including senior management. Feedback rounds, an extended management team, Vertrauensmitarbeiter as employee representatives. Short decision paths, direct communication.
What we expect from you:
Honestly: being a team player matters more to us than technical knowledge. You don’t have to be an expert – but you do have to be willing to learn, show initiative and work with others. We can teach you the technical side. Attitude we can’t.
Your development with us:
Individual professional development (seminars, certifications, conferences), structured onboarding with mentoring, internal advancement opportunities – from apprentice to specialist, from technician to project manager.
Our vision
Testo Sensor is the most respected and preferred partner for temperature probes.
Our mission
We inspire our customers with reliable and long-lasting application solutions.
Our Guiding Principles
Our collaboration within the team and with our customers and partners is fair, transparent and reliable.
Our teams
We don’t just supply temperature probes – we provide solutions. Quality doesn’t happen by chance.
It comes from a team that sticks together and from customers and partners we work with cooperatively and always as equals.Timo Löffler
Managing Director of Testo Sensor GmbH
In Engineering, everything revolves around specification, design and prototypes. This is where temperature probes are guided from the first idea through qualification to series release.
Sales
Sales works closely with customers, translates technical requirements into concrete solutions and implements them together with the internal specialist departments.
Customer Service & Order Processing
Customer Service is the interface between customers and production. This is where enquiries are answered, quotations prepared, delivery dates coordinated and orders processed on schedule.
Laboratory and Quality Management
The laboratory develops and runs test procedures. This includes the qualification of probes using temperature, shock and vibration tests.
Manufacturing and Logistics
Manufacturing and Logistics focus on efficient processes and high delivery reliability. Topics include process optimisation, low error rates, stable supply chains and sustainable solutions.
Personal
HR supports employees from recruitment through onboarding and professional development to benefits and personal support.
Marketing
Marketing is responsible for how Testo Sensor presents itself externally. This includes flyers and brochures as well as content and copy for the website and webshop.
Purchasing & Customs
Purchasing organises the availability of the right components, sensors and materials, including supplier negotiations, cost optimisation and the reliable handling of customs and compliance.
Which role will you take on?
Talent is always welcome here. Take a look at our current vacancies or send us a speculative application. We look forward to hearing from you.
Would you like to actively shape the successful course of Testo Sensor?

Produktionsmitarbeiter (m/w/d)
Du arbeitest gerne praktisch und legst Wert auf Qualität? Dann unterstütze unser Fertigungsteam beim Aufbau verschiedenster Temperaturfühler und Baugruppen. Du führst Messungen nach Anleitung durch, übernimmst die Paarung gemessener Temperaturfühler und wendest Techniken wie Löten, Spleißen, Vergießen und Rollieren an. Du hast erste Erfahrung in der Produktion und arbeitest zuverlässig? Dann freuen wir uns auf Deine Bewerbung!

Mitarbeiter Serienqualität und Qualitätsmanagement (m/w/d)
Du möchtest Qualität nicht nur prüfen, sondern aktiv mitgestalten? Als Mitarbeiter Serienqualität und Qualitätsmanagement (m/w/d) stellst Du die Serienreife neu entwickelter Temperaturfühler sicher, analysierst Reklamationen und bringst Verbesserungen in Produkte und Prozesse ein. Dabei arbeitest Du eng mit Entwicklung und Produktion in Deutschland und China zusammen und wirkst an unserem QM System nach ISO 9001 mit. Klingt nach Deiner Aufgabe?

Initiativbewerbung
Du möchtest Teil von Testo Sensor werden, findest aktuell aber keine passende Stelle? Dann freuen wir uns auf Deine Initiativbewerbung. Zeig uns, in welchem Bereich Du Dich einbringen möchtest, welche Erfahrungen Du mitbringst und was Dich an Testo Sensor interessiert.
Jetzt bewerben …
Here’s what you can expect from us:
Working in a team
Flat hierarchies
Flexible working hours
Fair pay
Health programme
Job-Rad bike leasing
Company pension scheme
Staff discounts
Free hot drinks
Can’t find what you’re looking for?
Can’t find a suitable vacancy?
Perhaps there isn’t the right opportunity for you at the moment.
Feel free to take a look at our group Testo SE & Co. KGaA or at Testo Industrial Services – there are plenty of other exciting opportunities there.
Or send us a speculative application. We look forward to receiving your application!
Get in contact with us.
- Testo Sensor GmbH
- Testo-Str. 1 | 79853 Lenzkirch
- +49 07653 681-0 (Testo HQ)
- +49 7653 96597 99
- info@testo-sensor.de
- Neu: Testo Sensor Webshop
