![Hagen Lessing](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Hagen Lessing currently works at Ista Metering Services España SA, as Chief Executive Officer and ista SE, as Chief Executive Officer from 2021.
Dr. Lessing also formerly worked at ista International GmbH, as Country Manager-Germany & Deputy CEO, ista Luxemburg GmbH, as Chief Executive Officer, and Trionista Topco GmbH, as Managing Director.
| Unternehmen | Position | Beginn |
|---|---|---|
Ista Metering Services España SA
 Ista Metering Services España SA Miscellaneous Commercial ServicesCommercial Services Provides measurement and individual billing services of heating, water and other energy consumption | Vorstandsvorsitzender | - |
ista SE
 ista SE Engineering & ConstructionIndustrial Services Provides digital and decentralized energy management solutions | Vorstandsvorsitzender | 01.06.2021 |
| Unternehmen | Position | Ende |
|---|---|---|
Trionista Topco GmbH
 Trionista Topco GmbH Electric UtilitiesUtilities Operates as a holding company with interests in energy services | Vorstandsvorsitzender | - |
ista Luxemburg GmbH
 ista Luxemburg GmbH Alternative Power GenerationUtilities Provides energy cost and data management services | Vorstandsvorsitzender | - |
ista International GmbH
 ista International GmbH Miscellaneous Commercial ServicesCommercial Services Provides services for the consumption-dependent billing of energy, water and ancillary costs | Corporate Officer/Principal | - |
Aktive
Inaktive
Börsennotierte Unternehmen
Private Unternehmen
| Private Unternehmen | 5 |
|---|---|
ista International GmbH
ista International GmbH Miscellaneous Commercial ServicesCommercial Services Provides services for the consumption-dependent billing of energy, water and ancillary costs | Commercial Services |
ista Luxemburg GmbH
ista Luxemburg GmbH Alternative Power GenerationUtilities Provides energy cost and data management services | Utilities |
Ista Metering Services España SA
Ista Metering Services España SA Miscellaneous Commercial ServicesCommercial Services Provides measurement and individual billing services of heating, water and other energy consumption | Commercial Services |
Trionista Topco GmbH
Trionista Topco GmbH Electric UtilitiesUtilities Operates as a holding company with interests in energy services | Utilities |
ista SE
ista SE Engineering & ConstructionIndustrial Services Provides digital and decentralized energy management solutions | Industrial Services |
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