Skip to main content
Top expert badge
Recommended expert
Profile header background

Stefan Gröne - Senior Technical Architect / Sub-project Manager

Stefan Gröne
Profile header overlay
Ballrechten-Dottingen, Germany

Experience

Apr 2024 - Feb 2026
1 year 11 months

Senior Technical Architect / Sub-project Manager

Helaba

Expertise details
Position Summary
Senior Technical Architect / Sub-project Manager at Helaba
Industries
Banking and Finance
Business Areas
Information Technology
Project Management
  • Sub-project management

  • Designing the technical architecture and implementation

  • MS Active Directory

  • MS Azure Entra ID

  • Omada Identity Suite

Strategic realignment of the hybrid identity architecture of a regulated bank. Consolidation and security-focused standardization of multiple Active Directory environments and building a bank-wide Microsoft Entra ID structure. Migration of users and groups into a hybrid identity architecture and integration of Entra ID into existing governance and access processes (Omada). Implementation of regulatory requirements and establishment of audit-ready lifecycle processes to reduce structural security risks.

Jan 2023 - Mar 2024
1 year 3 months

Senior Technical Architect / Sub-project Manager

Helaba

Expertise details
Position Summary
Senior Technical Architect / Sub-project Manager at Helaba
Industries
Banking and Finance
Business Areas
Information Technology
Project Management
  • Sub-project manager and technical architect for the restructuring

  • MS Active Directory

  • MS Azure Active Directory

  • Omada Identity Suite

  • LDAP

Overall technical responsibility for the security-focused restructuring of a regulated bank’s Active Directory environment. Implementation of the target architecture concept with consideration of governance, tiering, and hybrid identity requirements. Adaptation and partial redevelopment of existing interfaces to IGA and cloud components to prepare for Azure AD integration and to improve auditability and standardize identity processes.

Oct 2022 - Dec 2022
3 months

Senior Technical Architect

Helaba

Expertise details
Position Summary
Senior Technical Architect at Helaba
Industries
Banking and Finance
Business Areas
Information Technology
Project Management
  • Project lead for migration of MS Windows and MS SQL Server to current versions

  • MS Active Directory

  • Omada Identity Suite

Development and documentation of a security-focused detailed concept for the strategic realignment of the on-prem Active Directory architecture of a regulated bank. Definition of the target architecture with consideration of tiering models, governance requirements, hybrid identity preparation, and integration into existing IGA processes. The goal was to create a standardized, auditable, and cloud-ready AD structure as a basis for the subsequent transformation.

Mar 2022 - Sep 2022
7 months

Project Manager

ISS

Expertise details
Position Summary
Project Manager at ISS
Industries
Information Technology
Business Areas
Information Technology
Project Management
  • Project management for migration of MS Windows and MS SQL Server to current versions

  • MS Windows Server

  • MS SQL Server

  • MS Project

  • Jira

Overall responsibility for the technical and organizational execution of the migration and consolidation of 30 Windows servers and 7 SQL servers to current, supported versions. Led the project team, coordinated with business units on application dependencies, and ensured a low-disruption transition to the target environment. In addition to platform modernization, this laid the foundation for increased operational stability, supportability, and security compliance.

Jan 2021 - Feb 2022
1 year 2 months

Senior Technical Architect / Project Manager

Helaba

Expertise details
Position Summary
Senior Technical Architect / Project Manager at Helaba
Industries
Banking and Finance
Business Areas
Information Technology
Project Management
  • Creating a concept for optimization and automation of Active Directory

  • MS Active Directory

  • MS PowerShell

  • Omada Identity

Architecture and implementation of a security-focused realignment of Active Directory to meet regulatory requirements and reduce administrative complexity. Restructuring the OU and GPO architecture and analyzing and cleaning up about 18,000 permission groups to reduce permission sprawl and improve auditability. Development and implementation of an automated interface to the identity governance system (Omada) to fully map the user lifecycle and enable audit-ready control of permissions. Result: significant increase in transparency, governance capability, and security in the identity environment while reducing manual administration efforts.

Dec 2019 - Dec 2020
1 year 1 month

Senior Technical Architect / Subproject Manager

Helaba

Expertise details
Position Summary
Senior Technical Architect / Subproject Manager at Helaba
Industries
Banking and Finance
Business Areas
Information Technology
Project Management
  • Create a filesystem migration plan and execute the migration

  • MS Active Directory

  • Omada Identity

  • MS DFS

  • NetApp vServer

Security-focused restructuring of the bank-wide filesystem as part of organizational changes. Designed and implemented a standardized, governance-compliant target structure, including redefining permission models. Automated data migration coordinated with business units and integrated permissions into the identity governance system (Omada). Cleaned up obsolete access rights to reduce permission risks and improve auditability. Result: a transparent, audit-ready filesystem structure with clear permission logic and reduced security complexity.

Mar 2018 - Nov 2019
1 year 9 months

Senior Technical Architect / Subproject Manager

Helaba

Expertise details
Position Summary
Senior Technical Architect / Subproject Manager at Helaba
Industries
Banking and Finance
Business Areas
Information Technology
Project Management
  • Develop overall concept for redesigning Active Directory and the filesystem

  • MS Active Directory

  • Omada Identity

  • MS DFS

  • NetApp vServer

Architected and implemented the technical integration of Active Directory and the filesystem into a bank-wide identity governance system (Omada). Redesigned the AD and filesystem structure to support role-based permission models and to prepare for audit-proof, centrally managed permission assignment. Created the overall concept and implemented the required interfaces. Result: established a governance-compliant, centrally managed permission architecture as a basis for regulatory compliance and future hybrid identity transformation.

Oct 2017 - Jan 2018
4 months

Infrastructure Architect

ThyssenKrupp AG

Expertise details
Position Summary
Infrastructure Architect at ThyssenKrupp AG
Industries
Manufacturing
Business Areas
Information Technology
  • Create a technical concept for the data center outsourcing tender

  • MS Azure Cloud

  • IT Security

  • MS Windows Server

  • Virtualization

Technical concept for outsourcing Europe's data centers to an external provider, using both a traditional data center and MS Azure Cloud. Focus on migrating servers and application systems to the cloud and data center while considering technical feasibility and security aspects.

Sep 2016 - Sep 2017
1 year 1 month

Migration Expert

ThyssenKrupp AG

Expertise details
Position Summary
Migration Expert at ThyssenKrupp AG
Industries
Manufacturing
Business Areas
Information Technology
  • Analyze existing infrastructure and application systems

  • Support the migration

  • MS Active Directory

  • MS Windows Server 2003, 2008R2, 2012R2

  • VMWare ESX

Harmonized IT infrastructure as part of ThyssenKrupp Elevator GmbH's global unITe project. Described system and application dependencies and developed transition strategies for the Future Model Operations.

Jul 2015 - Jul 2016
1 year 1 month

Project Manager

Staples Europe

Expertise details
Position Summary
Project Manager at Staples Europe
Industries
Retail
Business Areas
Information Technology
Project Management
  • Multi-project management for IT infrastructure projects

  • Managing project team members

  • Change and incident management

  • Reporting to stakeholders

  • MS Active Directory

  • MS Windows Server 2012R2

  • VMWare ESX

  • EMC Storage

Standardized and upgraded existing Windows Server 2003 environments. Harmonized IT infrastructure across Europe, consolidated old AD domains, migrated around 300 servers to Windows 2012R2, implemented virtualization with VMware ESX, managed data center relocations and Exchange migration to MS Office 365, and introduced centralized software distribution using MS SCCM.

Feb 2015 - Jun 2015
5 months
Wörth am Rhein, Germany

Project Manager

Daimler AG

Expertise details
Position Summary
Project Manager at Daimler AG
Industries
Automotive
Business Areas
Operations
Project Management
  • Project control

  • Planning and conducting workshops to document and optimize processes

  • Modeling processes

  • Integrating processes into a workflow tool

  • MS Windows Server 2008R2

  • MS IIS

  • MS SQL Server

  • Cabacos CMS

  • EPK

Analysis, optimization and modeling of processes in the technical service of the commercial vehicle plant. Implementation and rollout in a workflow tool.

Jul 2014 - May 2015
11 months
Wörth am Rhein, Germany

Technical Project Manager

Daimler AG

Expertise details
Position Summary
Technical Project Manager at Daimler AG
Industries
Automotive
Business Areas
Information Technology
Project Management
  • Project management and supplier management

  • Definition and implementation of processes according to ITIL

  • Improvements in IT security

  • Creation of technical concepts

  • MS Active Directory

  • MS Windows Server 2008R2

  • MS Windows 7

  • MS Office 2010

  • ARIS

  • ITIL

  • Sophos

  • Qualys

Integration of existing and newly acquired production computers into the global AD, planning and execution of the integration with IT security aspects in mind, definition of operational processes and introduction of necessary procedures.

Jan 2003 - May 2005
2 years 5 months
Bad Krozingen, Germany

Head of IT Department

Median Kliniken Bad Krozingen

Expertise details
Position Summary
Head of IT Department at Median Kliniken Bad Krozingen
Industries
Healthcare
Business Areas
Information Technology
Procurement
Project Management
  • Leading employees
  • Project planning, leadership, management and controlling
  • Process analysis and optimization in the context of software changes and implementations
  • Participating in organizational adjustments
  • IT procurement
  • Server administration
  • Managing user support (1st/2nd/3rd level)
  • Advising management and staff on IT issues
  • Developing IT training programs
  • Introducing a training system
  • Drafting works agreements
  • Contractual matters
Mar 1999 - Feb 2000
1 year

Working Student in IT Department

Wincor-Nixdorf AG

Expertise details
Position Summary
Working Student in IT Department at Wincor-Nixdorf AG
Industries
Information Technology
Business Areas
Customer Service
Information Technology
  • User support (1st/2nd level)
  • Server administration
  • Installation and administration of client operating systems
  • Installation and configuration of applications

Industry Experience

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

Experienced in Banking and Finance, Healthcare, Information Technology, Manufacturing, Retail, and Automotive.

Banking and Finance
Healthcare
Information Technology
Manufacturing
Retail
Automotive
Profile match chart

Business Area Experience

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

Experienced in Information Technology, Project Management, Procurement, Customer Service, and Operations.

Information Technology
Project Management
Procurement
Customer Service
Operations
Profile match chart

Summary

  • 20+ years of IT experience
  • Focus: Active Directory security, hybrid identity, governance
  • Experience in regulated environments (banking, automotive)
  • Implementation of regulatory requirements (BAIT, ISO 27001, BSI)
  • Architectural responsibility, migration, hardening, automation
  • Bridging technology, governance, and organization

Skills

Focus Areas

  • Identity & Access Management (Iam / Iga)
  • Active Directory Security & Tiering Concepts
  • Hybrid Identity (On-prem Ad / Entra Id)
  • Permission Modeling & Governance
  • Security Hardening According To Cis / Bsi
  • Regulatory Requirements In Banking
  • Technical Automation (Powershell)

Technical Skills

  • Operating Systems: Ms Windows Server, Ms Windows Client, Macintosh Os X
  • Programming Languages: Powershell, Html, Css, Javascript (Basic), Java (Basic)
  • Databases: Ms Sql Server, Ms Access, Mysql
  • Networking/data Communication: Tcp/ip, Lan/wan, Smtp/email, Firewall, Vpn, Interfaces
  • Software: Microsoft Active Directory, Microsoft Office 2013, 2016, 365, Omada Identity Suite, Jira/confluence, Microsoft Project, Microsoft Visio, Lotus Notes/domino, Bmc Remedy Itsm, Servicenow
  • Cloud: Microsoft Entra Id, Microsoft Azure, Microsoft Office 365, Google Apps For Business
  • Data & Process Modeling: Erm, Eepk, Aris, Omega
  • Methods: Itil, Prince2, Cis Benchmarks, Bsi Baseline Protection, Bait, Iso/iec 27001, 27002
  • Industries: All (Focus On Banking, Automotive, Retail, Healthcare)

Languages

German
Native
English
Advanced
Spanish
Elementary

Education

Oct 1998 - Mar 2002

Paderborn University

Business Informatics program, no degree · Business Informatics · Paderborn, Germany

Aug 1993 - Jul 1995

Merchant in wholesale and foreign trade · Wholesale and foreign trade

Certifications & licenses

Security, Compliance, and Identity Fundamentals SC-900

Microsoft

Certified Lotus Professional SA

Microsoft Azure Fundamentals AZ-900

Statistics

Experience

Total positions 14
Experience in Banking and Finance 7.5 y
Avg length 1 y
Longest experience 2 y 4 m

Global Experience

Countries worked in 1 (Germany)
Primary country Germany

Expertise

Recent roles Senior Technical Architect / Sub-project Manager, Senior Technical Architect, Project Manager
Main industries Banking and Finance, Healthcare, Information Technology
Main business areas Information Technology, Project Management, Procurement

Qualifications

Certifications earned 3

Profile

Created
Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Frequently asked questions

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

Where is Stefan based?

Stefan is based in Ballrechten-Dottingen, Germany.

What languages does Stefan speak?

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

How many years of experience does Stefan have?

Stefan has at least 15 years of experience. During this time, Stefan has worked in at least 10 different roles and for 7 different companies. The average length of individual experience is 1 year. Note that Stefan may not have shared all experience and actually has more experience.

What roles would Stefan be best suited for?

Based on recent experience, Stefan would be well-suited for roles such as: Senior Technical Architect / Sub-project Manager, Senior Technical Architect, Project Manager.

What is Stefan's latest experience?

Stefan's most recent position is Senior Technical Architect / Sub-project Manager at Helaba.

What companies has Stefan worked for in recent years?

In recent years, Stefan has worked for Helaba and ISS.

Which industries is Stefan most experienced in?

Stefan is most experienced in industries like Banking and Finance, Healthcare, and Information Technology. Stefan also has some experience in Manufacturing, Retail, and Automotive.

Which business areas is Stefan most experienced in?

Stefan is most experienced in business areas like Information Technology, Project Management, and Procurement. Stefan also has some experience in Customer Service and Operations.

Which industries has Stefan worked in recently?

Stefan has recently worked in industries like Banking and Finance and Information Technology.

Which business areas has Stefan worked in recently?

Stefan has recently worked in business areas like Information Technology and Project Management.

What is Stefan's education?

Stefan attended Paderborn University for Business Informatics.

Does Stefan have any certificates?

Stefan has 3 certificates. These include: Security, Compliance, and Identity Fundamentals SC-900, Certified Lotus Professional SA, and Microsoft Azure Fundamentals AZ-900.

What is the availability of Stefan?

Stefan is immediately available for suitable projects.

What is the rate of Stefan?

Stefan's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

How to hire Stefan?

To hire Stefan, click the Meet button on the profile to request a meeting and discuss your project needs.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1200
900
600
300
Rate comparison chart
Market avg: 912-1072 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Similar Freelancers

Discover other experts with similar qualifications and experience

Experts recently working on similar projects

Freelancers with hands-on experience in comparable project as a Senior Technical Architect / Sub-project Manager

Nearby freelancers

Professionals working in or nearby Ballrechten-Dottingen, Germany