Jan Hertlein - Freelance Energy Consultant

Q: Where is Jan based?

Jan is based in Freiburg im Breisgau, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Jan speak?

Jan speaks the following languages: German (Native), English (Advanced), Spanish (Advanced), French (Elementary) .

Q: How many years of experience does Jan have?

Jan has at least 21 years of experience. During this time, Jan has worked in at least 13 different roles and for 10 different companies . The average length of individual experience is 1 year and 7 months . Note that Jan may not have shared all experience and actually has more experience.

Q: What is Jan's latest experience?

Jan's most recent position is Freelance Energy Consultant at Energieberatung Hertlein .

Q: What companies has Jan worked for in recent years?

In recent years, Jan has worked for Energieberatung Hertlein , greenventory GmbH , and SICK AG .

Q: Which industries is Jan most experienced in?

Jan is most experienced in industries like Manufacturing , Utility Services , and Energy . Jan also has some experience in Education , Construction , and Government and Public Administration .

Q: Which business areas is Jan most experienced in?

Jan is most experienced in business areas like Human Resources (HR) , Project Management , and Sales . Jan also has some experience in Product Development , Information Technology (IT) , and Marketing .

Q: Which industries has Jan worked in recently?

Jan has recently worked in industries like Manufacturing and Energy .

Q: Which business areas has Jan worked in recently?

Jan has recently worked in business areas like Human Resources (HR) , Project Management , and Strategy and Planning .

Recommended expert

Freiburg im Breisgau, Germany

Experience

May 2025 - Present

9 months

Freelance Energy Consultant

Energieberatung Hertlein

Energy consulting for residential buildings
Development of individual renovation roadmaps
Preparation of energy performance certificates
Advice on funding and application
Construction support

Apr 2024 - May 2025

1 year 2 months

Freiburg im Breisgau, Germany

Project Manager

greenventory GmbH

Project management of municipal heat planning projects in collaboration with municipalities, energy suppliers, and engineering firms
Conducting inventory and potential analyses
Defining suitable areas and planning measures
Client support for software solutions
Establishment of knowledge management

Apr 2023 - Sep 2024

1 year 6 months

Waldkirch, Germany

Training Consultant & Team Coach

SICK AG

Team coaching and project management of strategic department projects
Introduction and support for new methods and agile working practices such as OKR and SCRUM
Facilitating workshops and conducting training sessions
Development of digital training materials

Feb 2019 - Mar 2023

4 years 2 months

Waldkirch, Germany

Head of Training Consulting

SICK AG

Built a team of seven people
Took over personnel and technical leadership of the team
Represented the team in the business unit management

Jan 2017 - Jan 2019

2 years 1 month

Waldkirch, Germany

Training Consultant

SICK AG

Project management for division-wide and company-wide training projects
Expanded the existing training portfolio to include client trainings, including development of initial products, market and competitor analysis, and marketing preparation
Managed the SIA Campus project in the areas of media infrastructure, commissioning, and employee onboarding
Advised business units on digitization and Industry 4.0
Evaluated the feasibility of new methods and technologies
Supported the sales organization in developing current training products

Sep 2011 - Dec 2016

5 years 4 months

Waldkirch, Germany

Training Manager

SICK AG

Target group-oriented development of training plans and materials
Planning and conducting product trainings for internal and external target groups
Introduction of new training methods and materials such as blended learning, e-learning, hands-on trainings, and video tutorials
Point of contact for all training topics in the business unit for sales and subsidiary companies

Feb 2008 - Aug 2011

3 years 7 months

Offenburg, Germany

Business Developer

Hansgrohe AG / Pontos GmbH

Development of international markets for greywater treatment and heat recovery technologies
Sales and service support for existing markets
Innovation development in collaboration with R&D
Project management of international cooperation projects and PPP initiatives
Focus regions: Southwestern Europe, South Africa, Middle East

Oct 2007 - Jan 2008

4 months

Freelancer

Speechless Engineered Translation

Continuing freelance translation work for Speechless – engineered translation
Translation of technical texts from English to German and Spanish to German

Jan 2007 - Sep 2007

9 months

Eschborn, Germany

Junior Specialist

Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) GmbH

Project management in the ecosan sector project (circular wastewater and sanitation systems)
Management of EU cooperation projects with a regional focus on West Africa

Jan 2006 - Jan 2007

1 year 1 month

Hoisdorf, Germany

Managing Director

Jugendheim Lichtensee

Occupancy management and accounting
Budget planning and responsibility
Organizing events
Representing the institution externally

Jan 2005 - Dec 2005

1 year

Hamburg, Germany

Project Engineer

Züblin Umwelttechnik GmbH

Project and plant supervision for large-scale process engineering plants in soil and groundwater remediation
Concept development and proposal preparation for international markets

Sep 2004 - Nov 2004

3 months

Bad Belzig, Germany

Intern

Ökotec GmbH

Technical support for a project on wastewater hygiene

Sep 2002 - Feb 2003

6 months

Tepotzotlán, Mexico

Practical semester student

Umweltschutz Nord GmbH

Participated in a BMBF research project on reducing microbial counts in wastewater through constructed wetlands

Skills

Energy Balancing Software (Hottgenroth, Evebi)
Ms Office Suite, Sap
Project Management And Agile Tools (Atlassian Jira, Miro, Slack)
Scrum, Lego Serious Play (Certified Facilitator), Design Thinking
Authoring Tools (Articulate 360, Synthesia)

Languages

German

Native

English

Advanced

Spanish

Advanced

French

Elementary

Education

Sep 2003 - Jul 2004

Van Hall Instituut

Dual degree as Dipl. Ing. (FH) in environmental process engineering and Bachelor of Environmental Engineering (B. Hons.) · Environmental process engineering with a focus on environmental science · Leeuwarden, Netherlands

Sep 2000 - Sep 2003

Fachhochschule Wilhelmshaven

Dual degree as Dipl. Ing. (FH) in environmental process engineering and Bachelor of Environmental Engineering (B. Hons.) · Environmental engineering (international program in environmental process engineering) · Wilhelmshaven, Germany

Oct 1990 - Jun 1999

Kreisgymnasium Bargteheide

General university entrance qualification · Bargteheide, Germany

Certifications & licenses

Information Security Foundation ISO/IEC 27001

LEGO Serious Play Methods And Materials

Leadership training

Transactional analysis

E-trainer training

Profile

Created

December 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Jan based?

Jan is based in Freiburg im Breisgau, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Jan speak?

Jan speaks the following languages: German (Native), English (Advanced), Spanish (Advanced), French (Elementary).

How many years of experience does Jan have?

Jan has at least 21 years of experience. During this time, Jan has worked in at least 13 different roles and for 10 different companies. The average length of individual experience is 1 year and 7 months. Note that Jan may not have shared all experience and actually has more experience.

What roles would Jan be best suited for?

Based on recent experience, Jan would be well-suited for roles such as: Freelance Energy Consultant, Project Manager, Training Consultant & Team Coach.

What is Jan's latest experience?

Jan's most recent position is Freelance Energy Consultant at Energieberatung Hertlein.

What companies has Jan worked for in recent years?

In recent years, Jan has worked for Energieberatung Hertlein, greenventory GmbH, and SICK AG.

Which industries is Jan most experienced in?

Jan is most experienced in industries like Manufacturing, Utility Services, and Energy. Jan also has some experience in Education, Construction, and Government and Public Administration.

Which business areas is Jan most experienced in?

Jan is most experienced in business areas like Human Resources (HR), Project Management, and Sales. Jan also has some experience in Product Development, Information Technology (IT), and Marketing.

Which industries has Jan worked in recently?

Jan has recently worked in industries like Manufacturing and Energy.

Which business areas has Jan worked in recently?

Jan has recently worked in business areas like Human Resources (HR), Project Management, and Strategy and Planning.

What is Jan's education?

Jan holds a Bachelor in Environmental process engineering with a focus on environmental science from Van Hall Instituut and a Bachelor in Environmental engineering (international program in environmental process engineering) from Fachhochschule Wilhelmshaven.

Does Jan have any certificates?

Jan has 5 certificates. Among them, these include: Information Security Foundation ISO/IEC 27001, LEGO Serious Play Methods And Materials, and Leadership training.