Jörn Greszki
Fähigkeiten und Kenntnisse
Werdegang
Berufserfahrung von Jörn Greszki
- Bis heute 3 Jahre und 10 Monate, seit Okt. 2021
Solution Designer
CARIAD - a Volkswagen Group Company
- Bis heute 4 Jahre und 8 Monate, seit Dez. 2020
5G Design Specialist & Procurement Management
HELIOS Park-Klinikum Leipzig
- Bis heute 5 Jahre und 7 Monate, seit 2020
Owner
INFRA-SOLUTIONS GmbH
- Bis heute 25 Jahre und 1 Monat, seit Juli 2000
Owner
DRESCHER & DRESCHER GmbH
- process design - process support tool design - accounting support
- 1 Jahr und 4 Monate, Juni 2017 - Sep. 2018Tele Columbus AG
Project Manager / Business Process Consultant
- process developement - supporting financial accounting - project support for implementation projects - engineering support for material specification and selection - business modelling for FTTx rollout
Consultancy for - technical tender strategy - technical criteria definition
Project Management for 3 implementation projects
- 6 Monate, Okt. 2014 - März 2015
Senior Network Design Engineer
Nokia Networks
Core Network design in order to merge O2 and e-plus core networks - gap analysis betwwen 2 networks - design of transition phase network - design of target network
- 2 Jahre und 7 Monate, Jan. 2012 - Juli 2014
OSS / Lawful Interception Consultant
Hutchison 3 Austria GmbH
Design and purchasing of a Lawful Interception Solution. Review and testing of OSS modules. Tasks in and around ZTE OSS and related functional blocks in the ZTE CN nodes.
- 1 Jahr und 8 Monate, Dez. 2009 - Juli 2011
Core Network Consultant
Hutchison 3 Austria GmbH
Replacement of the NSN R4 CS&PS network elements by ZTE CS&PS Core elements. Review, testing and gap analysis of the OSS of ZTE.
- 3 Monate, Okt. 2009 - Dez. 2009
Core Network Consultant / Billing Chain Consultant
NSN - Nokia Solutions and Networks
Analyzing and resolving problems within the charging and billing chain from CS CN element up to the billing engine.
Sunrise outsourced O&M department to Alcatel-Lucent, the tasks were almost the same as in Sunrise.
Operation, Maintenance, Testing and Implementation tasks within the Sunrise CS&PS Core Network.
Collection and analysis of O2 / Telefonica network security guidelines and demands. Gap analysis O2 demands versus security features and functionality of NSN core network products. Review and adapt the CN design as well as the product design to match O2 guidelines.
- 1 Jahr und 3 Monate, Mai 2005 - Juli 2006Telefónica Deutschland Gruppe
SMS platform design / Charging & Billing design
Review and implementation support for a signaling gateway / mediation device. - GAP analysis - technical consultancy - system / network design - charging/mediation/billing chain design
Temporary setup and operation of a monitoring solution as part of a network optimization campain.
- 1 Jahr und 2 Monate, Nov. 2003 - Dez. 2004
Network Monitoring Expert
Orange Israel
Implementation and operation of a network monitoring solution. Analysis, testing and support related to the entire landscape of Partners existing monitoring solutions.
- 4 Monate, Feb. 2003 - Mai 2003
Management Consultant
H3G Austria
Review and fine tuning of processes introduced 1/2 year ago
Sprachen
Deutsch
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Englisch
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