Sebastian Hellmann - Building Services Project Manager

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Dankerode, Germany

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Experience

Jan 2025 - Mar 2025

3 months

Berlin, Germany

Project Management KG400 LP 2 to 3

Ernst-Reuter-Gesamtschule

New construction and renovation of Ernst-Reuter-Gesamtschule, Berlin
Costs: --,- Mio € net

Jan 2025 - Mar 2025

3 months

Berlin, Germany

Project Management KG400 LP 3

Schadow-Gymnasium

New construction and renovation of Schadow-Gymnasium, Berlin
Costs: --,- Mio € net

Apr 2024 - Feb 2025

11 months

Germany

Concept development and planning of KG410/ 420/ 430 LP 1 to 9

Diakonie-Krankenhaus Harz

Renovation of a facility of Diakonie-Krankenhaus Harz
Costs: --,- Mio € net

Sep 2023 - Feb 2025

1 year 6 months

Gerlingen, Germany

Project Manager for the concept development and planning of KG410/ 420/ 430 LP 3 to 7

Hochhaus Stuttgart

Renovation of a high-rise building in Stuttgart, Gerlingen
Costs: --,- Mio € net

Sep 2023 - Sep 2024

1 year 1 month

Wiernsheim, Germany

Project Manager for the concept development and planning of KG410/ 420/ 430 LP 1 to 7

Mehrzweckhalle Wiernsheim

Renovation of a multi-purpose hall (1.000 persons) in Wiernsheim
Costs: --,- Mio € net

Jul 2023 - Jun 2024

1 year

Germany

Planning of precision air-conditioning cabinets LP 1 to 9

KV Sachsen-Anhalt

Planning of precision air-conditioning cabinets for the KV server room
Costs: --, Mio € net

Dec 2022 - Jan 2023

2 months

Germany

Analysis and evaluation of a heat supply concept

Stadtwerke Mansfeld-Südharz

Analysis and evaluation of a heat supply concept for the Stadtwerke
Costs: -,- Mio € net

Jul 2022 - Aug 2023

1 year 2 months

Berlin, Germany

Planning of HVAC systems and outdoor facilities LP 3 to 5

Wohnbauten Berlin

Planning of HVAC systems and outdoor facilities for residential buildings in Berlin
Costs: -,- Mio € net

Jun 2022 - Nov 2022

6 months

Güntersberge, Germany

Concept development and planning of KG410/ 420/ 430 and outdoor facilities LP 1 to 2

Feuerwehr Güntersberge

Concept development and planning of KG410/ 420/ 430 and outdoor facilities for Feuerwehr Güntersberge

Mar 2022 - Aug 2023

1 year 6 months

Bochum, Germany

Concept development and planning of KG410/ 420/ 430/ 470 LP 5

Viktoria Karree

Construction of Viktoria Karree in Bochum for various rental areas
Costs: -,- Mio € net

Feb 2022 - Aug 2023

1 year 7 months

Cologne, Germany

Planning KG410/ 420/ 430/ 470 LP 5 to 7

Universitätsklinik Köln

New construction of the pathology department at Universitätsklinik Köln in Cologne
Costs: --,- Mio € net

Dec 2021 - Aug 2022

9 months

Berlin, Germany

Concept development and planning of HKLS systems LP 1 to 5

Mehrfamilienhäuser Berlin

Concept development and planning of the HKLS systems for 4 apartment buildings with underground parking in Berlin
Costs: -,- Mio € net

Sep 2021 - May 2022

9 months

Concept development and planning of HKLS systems LP 1 to 4

Pharmaunternehmen

Concept development and planning of the HKLS systems for a canteen with an industrial kitchen (500 meals per day)
HLS costs: -,- Mio € net

Aug 2021 - Mar 2025

3 years 8 months

Harzgerode, Germany

Concept development and planning of ventilation systems LP 1 to 9

Grundschule Harzgerode

Concept development and planning of ventilation systems
L costs: 0,36 Mio € net

Nov 2018 - Nov 2022

4 years 1 month

Magdeburg, Germany

Preparation, supervision, review and project management in the HKLS department

Polizeiinspektion Sachsen-Anhalt

Preparation of tenders and construction supervision for replacement buildings of Polizeiinspektion Nord
Review of the HKLS planning for the „Polizeiinspektion Magdeburg“ and other replacement buildings
Review, adaptation and organization of tenders, project management for LP 7 and project management
HLS costs: Mio -, € net

Eisleben, Germany

Building services planning as part of general planning LP 1-8 and project management

Stadtwerke Eisleben

New construction of a CHP plant with 1.999 kWElt for Stadtwerke Eisleben
HKS costs: 1,450 Mio € net

Sangerhausen, Germany

Building services planning as part of general planning LP 1-8, LP 1-2 and project management

Stadtwerke Sangerhausen

New construction of a CHP plant with 1.999 kWElt + buffer storage (Vges=200 m³), as well as the development and integration of a buffer storage management system
HLS costs: 1,620 Mio € net
Heating supply concept for the new construction of a 3 MWth heating plant and expansion of the district heating route
HLS cost estimate: 3,600 Mio € net

Bitterfeld-Wolfen, Germany

Building services planning as part of general planning LP 1-5 and project management

Former DIY store

Conversion of a former DIY store in Bitterfeld-Wolfen
HKS costs: 0,067 Mio € net

Leipzig, Germany

Building services planning as part of general planning LP 1-8

New construction of apartment building with 8 residential units

New construction of an apartment building with 8 residential units in Leipzig
HKS costs: 0,165 Mio € net

Hettstedt, Germany

Building services planning as part of general planning LP 1-8 and project management

Hettstedt underground garage

New construction of a ventilation system for an underground garage in Hettstedt
HKS costs: 0,032 Mio € net

Eisleben, Germany

Building services planning as part of general planning LP 1-8 and project management

Boiler System Replacement

Replacement of an 8 MW boiler system and adjustment of the heat distribution network with peripherals
HKS costs: €0.413 million net

Querfurt, Germany

Building services planning as part of general planning LP 1-8

Retirement and Nursing Home

CHP unit with peak-load generation for heating a retirement and nursing home in Querfurt
HKS costs: €0.086 million net

Aschersleben, Germany

Building services planning as part of general planning LP 1-8 and project management

Dermatology Practice

Cooling of a dermatology practice in Aschersleben
KL costs: €0.025 million net

Eisleben, Germany

Building services planning as part of general planning LP 1-8

Helfta Fire Station

Heat supply for a fire station in Helfta
HLS costs: €0.015 million net

Eisleben, Germany

Building services planning as part of general planning LP 1-6

Eisleben Production Facility

District heating generation concept to supply a production facility with feed-in to the grid
HKS costs: €0.135 million net

Osterburg, Germany

Costing, proposal preparation and project management for HKS

Edeka

Renovation of an Edeka in Osterburg
HLS costs: 0,450 Mio € net

Halle (Saale), Germany

Project management for HK

Martin-Luther-Universität Halle/ Wittenberg

New construction of the Protein Center of Martin-Luther-Universität Halle/ Wittenberg in Halle/ Saale
HK costs: 1,300 Mio € net

Sarstedt, Germany

Costing, proposal preparation and project management for HKS

Baubetriebshof Sarstedt

New construction of the municipal building yard in Sarstedt
HKS costs: 0,120 Mio € net

Quedlinburg, Germany

TGA planning as part of general planning LP 1-4

New construction of a 14 WE MFH

New construction of a 14 WE MFH in Quedlinburg
HKS costs: 0,380 Mio € net

Quedlinburg, Germany

TGA planning

Retirement and nursing home

Preparation for and support during the expert acceptance inspection of a retirement and nursing home (178 rooms)
Completion 04-2017

Magdeburg, Germany

Project Management for HKS

Max-Planck-Institut

Expansion of the laboratory ventilation system at the Max-Planck-Institut in Magdeburg
HKS costs: 0,065 Mio € net

Cost calculation, preparation of quotations and project management for HKS

Construction of a new production hall

Use of two gas engine heat pumps for heating and cooling
HKS costs: 0,380 Mio € net

Harzgerode, Germany

Building services planning as part of general planning LP 1-5 and project management

Hotel Morada

Renovation of the riser system at Hotel Morada in Alexisbad
HKS costs: 0,040 Mio € net

Building services planning as part of general planning LP 1-5 and project management

Rheinmetall Defense

New construction and optimization of the heat generation and distribution system for a production and storage hall
HKS costs: 0,075 Mio € net

Wittenberg, Germany

Cost calculation, preparation of quotations and project execution for HKS

Schlosskirche Wittenberg

Renovation of the Schlosskirche in Wittenberg
HKS costs: 0,750 Mio € net

Wittmar, Germany

Project Management for HKS

New construction of a wastewater treatment plant

New construction of a wastewater treatment plant in Wittmar
HKS costs: 0,120 Mio € net

Magdeburg, Germany

Cost calculation, preparation of quotations and project execution for HKS

Sportpark life

Renovation of Sportpark life
HKS costs: 0,500 Mio € net

Derenburg, Germany

TGA planning as part of general planning LP 1-8

Glass manufactory

New construction of a Cafe´ and kitchen as well as expansion of the smoke extraction system
HLS costs: 0,050 Mio € net

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Construction, Government and Administration, Education, Real Estate, Healthcare, and Information Technology.

Construction

Government and Administration

Education

Real Estate

Healthcare

Information Technology

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Project Management, Procurement, Product Development, Information Technology, and Operations.

Project Management

Procurement

Product Development

Information Technology

Operations

Languages

German

Native

English

Advanced

Statistics

Experience

Total positions 38

Experience in Construction 6.5 y

Avg length 6 m

Longest experience 4 y

Global experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Project Management KG400 LP 2 to 3, Project Management KG400 LP 3, Concept development and planning of KG410/ 420/ 430 LP 1 to 9

Main industries Construction, Government and Administration, Education

Main business areas Project Management, Procurement, Product Development

Profile

Member since

August 2025

Last update

October 2026

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Frequently asked questions

Have questions? Find more information here.

Sebastian is based in Dankerode, Germany.

Sebastian speaks the following languages: German (Native), English (Advanced).

Sebastian has at least 6 years of experience. During this time, Sebastian has worked in at least 15 different roles and for 15 different companies. The average length of individual experience is 5 months. Note that Sebastian may not have shared all experience and actually has more experience.

Based on recent experience, Sebastian would be well-suited for roles such as: Project Management KG400 LP 2 to 3, Project Management KG400 LP 3, Concept development and planning of KG410/ 420/ 430 LP 1 to 9.

Sebastian's most recent position is Project Management KG400 LP 2 to 3 at Ernst-Reuter-Gesamtschule.

In recent years, Sebastian has worked for Ernst-Reuter-Gesamtschule, Schadow-Gymnasium, Diakonie-Krankenhaus Harz, Hochhaus Stuttgart, and Mehrzweckhalle Wiernsheim.

Sebastian is most experienced in industries like Construction, Government and Administration, and Education. Sebastian also has some experience in Real Estate, Healthcare, and Information Technology.

Sebastian is most experienced in business areas like Project Management, Procurement, and Product Development. Sebastian also has some experience in Information Technology, Operations, and Business Intelligence.

Sebastian has recently worked in industries like Construction, Government and Administration, and Education.

Sebastian has recently worked in business areas like Project Management, Procurement, and Product Development.

The availability of Sebastian needs to be confirmed.

Daily rate distribution

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<€640 €640-800 €800-960 €960-1120 €1120-1280 €1280+

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Average rates for similar positions

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Daily rate avg. 900 €

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Median rate 860 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 17 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.