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Our open positions

For our office in Königstein im Taunus, close to Frankfurt, we are currently looking for various consultants:

Exciting Mini Job Opportunity (Home-Based)

Interns in IT, Communication, or Climate Technology Consulting (full-time)

Mini Job - Administrator for Account Payable section

We invite you to contribute to the development and growth of HEAT in the Account Payable section of the administration department.

Your tasks:

  • Close cooperation with the accounts payable department.
  • Processing of timesheets from our project experts (copy and paste)
  • Processing approvals with relevant line managers
  • Reconciling of timesheets for expert invoice.
  • Checking spreadsheets for accuracy.
  • Maintaining digital and physical financial records.
  • You will provide feedback to improve tools and processes.

Your bring this with you:

  • Skills: Accurate and precise way of working, good maths skills and experience with MS Excel
  • Language: Proficiency in German and English

look forward to:

  • A varied field of activity in an extremely committed, interdisciplinary team
  • Independent work with a flat hierarchy
  • Intensive training in your new area of responsibility - and: Questions are allowed!
  • An open, uncomplicated team that values pleasant, respectful cooperation and mutual support.
  • The opportunity to work Home-Based (mobile)

Start: As soon as possible

Working hours: 14 hours per week

Length of contract: up to 1 year and extendable

Application: Please send your detailed, complete application documents with CV and references, stating your earliest possible starting date, to Interviews will take place as soon as possible.

Your contact person is: Abbas Samay, HEAT Administration and Internal Services Manager

Interns in IT, Communication, or Climate Technology Consulting

If you are an enrolled student and looking for an interesting place to spend your required internship at, we're looking forward to your application for a 6-month internship.

Requirements for all internships are:

  • You have started or recently completed higher education or FH degree program in a field relevant to your internship
  • Secure handling of the MS Office package
  • Independent, flexible and reliable way of working

Technology-focus internship

  • Supporting the development and implementation of technical studies, market or demand analyses,
  • Conducting of data collections, creation of inventories, calculation of greenhouse gas emissions


  • Basic knowledge of thermodynamics, refrigeration technologies or energy efficiency
  • Advanced knowledge in MS Excel, Access and database management (SQL)
  • Interested in interntional cooperation and climate policy
  • Fluent in English and German, Spanish or French are an asset

Communication-focus internship

  • Writing and editing of texts and presentations
  • Editing of company and project websites including social media
  • Supporting project acquisition


  • Quick grasp of technical topics
  • Interest in international cooperation and climate change policy
  • fluent German and English in spoken and written, ideally fluent Spanish or French

Internship with IT focus:

  • Support for in-house IT processes and processes;
  • Installation of hardware and software
  • Optimization of Microsoft SharePoint, teams and other programs for internal use


  • Extended Excel, Access, and Database Knowledge (SQL)
  • Knowledge of MS Office365, especially MS Sharepoint and MS Teams
  • Experience as network administrator
  • Knowledge in powershell / scripting desirable

Want to apply?

You are highly motivated, have a professional and responsible work attitude with a high degree of flexibility, and an accurate and independent working style. You have excellent oral and written communication skills and like to work in a team? We are looking forward to your application!

Your application:

Please send us your application (motivation/cover letter, CV and relevant certificates) including your earliest availability, salary expectation and language level according to the European framework by email.

Your contact person is Claudia Becker

Phone: +49 61 74 94 03 70 4
or +49 61 74 96 97 40 (head office)

Interested but no vacancy posted?

If you are interested to work with us in our office in Königstein im Taunus, close to Frankfurt, you are welcome to send us an unsolicited application!