Recommended expert

Kristof Blümel

Strategic Consulting

Kristof Blümel
Wunstorf, Germany

Experience

Nov 2024 - Jun 2025
8 months

Strategic Consulting

German Grid-Battery Storage Provider

  • Consulted on IT security and process optimization, focusing on NIS2 and risk requirements
  • Troubleshot and optimized plant core networks using STP, certified hardware, and open-source components such as OPNsense
  • Redesigned network segmentation for VLAN rollout in a hybrid multisite multicloud setup using Tailscale VPN
  • Facilitated cross-departmental discussions to align technical and social requirements
  • Optimized monitoring with Grafana, Telegraf, and SNMP configurations
  • Prototyped network setup for a new plant, including VLAN separation with Tailscale VPN
  • Automated various scenarios using Python and Bash scripting
Nov 2023 - May 2025
1 year 7 months

Rapid Prototyping for AI Cloud Platform Solution

Cloudelligence GmbH

  • Evaluated and implemented AWS Bedrock components to enhance a Next.js application with knowledge-based agents and AWS Cognito for sign-in with multiple authentication providers
  • Configured infrastructure as code using TypeScript and AWS CDK, integrated with GitLab CI/CD
  • Set up Server 2022 DTC scenarios
  • Configured hosted bare-metal servers through complex FortiGate gateway scenarios
May 2022 - May 2024
2 years 1 month
Hybrid

Cloud-Only Transformation Consultant

Immowelt GmbH / AVIV Group

  • Consulted and optimized transformation of hybrid Windows (2008–2022) and Linux server setups into a cloud-only AWS environment
  • Re-architected two monolith platforms into microservices on AWS native tech stack
  • Managed AWS infrastructure as code with Terraform and deployed via GitLab, Jenkins, and CircleCI pipelines
  • Integrated Okta as an Auth0 provider into legacy and new applications
  • Supported integration of Microsoft Azure Intune and Okta for seamless employee onboarding and workstation provisioning
  • Expanded on-premises Active Directory (Server 2022) with AWS site trusts for improved performance and stability
  • Implemented FortiGate management for multiple HA instances
Nov 2021 - May 2023
1 year 7 months
Hybrid

Hybrid Cloud Solution Optimization Engineer

noris Network AG

  • Optimized, tested, and restructured a dynamic hybrid cloud solution based on VMware Cloud Director
  • Conducted usability tests focusing on automatic infrastructure deployment via IaC using Terraform
  • Implemented Windows Server 2022 DTC deployments
Sep 2021 - Present
4 years 6 months

Central Network Security Gateway API Development

Energie Baden-Württemberg

  • Using Python, implemented an AWS CDK template with automated pipeline deployment to publish an API for fully automated attaching and detaching of Transit Gateway networks to customers' CheckPoint firewalls
  • Connected on-premise networks to individually encapsulated cloud networks
  • Developed a visualization tool for route records and drift analysis
  • Developed the API using AWS Lambda with Python
  • Documented the API in Swagger files
  • Implemented cascaded pipelines in Azure DevOps
  • Retrieved secrets from AWS Secrets Manager
Jun 2021 - Jul 2021
2 months

Technical Exploration and Consulting

International Mechanical Engineering Company

  • Explored cloud-based, hyperscale services with Power BI, Azure Active Directory, and Node.js to enhance a customer portal with business intelligence logic
Mar 2021 - Present
5 years

Exploration and Research Consultant

Chemical Supplier

  • Authorized Azure AD B2B users for Power BI report access via a principal portal
  • Advised on Azure AD B2B vs. B2C implementations
  • Conducted research and exploration tasks in backoffice development
  • Pre-tested and evaluated APIs for various products
  • Prototyped infrastructure elements
Feb 2021 - Mar 2021
2 months

Integration Engineer

Online Retailer

  • Enabled data scientists to log in to Google Cloud Platform using Active Directory accounts
  • Configured Google Cloud Directory Sync
  • Configured Google Identity and Access Management
  • Configured AWS Single Sign-On as a proxy to an on-premises Active Directory
Jan 2017 - Feb 2021
4 years 2 months

Chief Technical Officer

eves_ consulting GmbH

  • Served as CTO for all group branches and led a department of 8 system engineers for 6 months
  • Conducted technical presales and requirement analysis
  • Managed various Microsoft 365 migrations including mail, SharePoint, Azure AD, Azure computing, and hybrid deployments
  • Led migrations of Small Business Server 2008–2011 and VMware vCenter + vSphere environments (150 VMs)
  • Designed and implemented Active Directory, Exchange, and SQL infrastructures
  • Implemented email encryption with Totemo Mail for 2,000 public sector seats
  • Executed complex infrastructure implementation projects, including RIM BlackBerry Enterprise Server, Excitor DME, and Giritech G/On remote access
  • Developed automated onboarding/offboarding solutions using PHP8 and PowerShell
Feb 2013 - Mar 2014
1 year 2 months

System Engineer (Worldwide Support for VW)

eves_ information technology AG

  • Provided worldwide support for VW end-of-line software flashing
  • Operated Oracle databases
  • Managed JBoss operations
Feb 2012 - Dec 2016
4 years 11 months

System Engineer

eves_ information technology AG

  • Implemented infrastructure projects in medium and enterprise environments, including technical presales and project planning
  • Deployed RIM BlackBerry Enterprise Server, Excitor DME, and Giritech G/On remote access solutions
  • Migrated various Microsoft environments including Small Business Server 2008–2011
  • Designed and implemented VMware vSphere environments (30 VMs) with Active Directory, Exchange, and SQL
Sep 2009 - Jan 2012
2 years 5 months

Apprentice IT Specialist for System Integration

eves_ information technology AG

  • Provided customer support
  • Completed final thesis: BlackBerry Enterprise Server vs. Excitor DME – a TCO analysis
Jan 2006 - Present
20 years 2 months

IT Support and Consultant

bluemels

  • Provided IT support and consulting services for small-sized businesses

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (20 years), Chemical (5 years), Utilities (4.5 years), Professional Services (4 years), Real Estate (2 years), and Automotive (1 year).

Information Technology
Chemical
Utilities
Professional Services
Real Estate
Automotive

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (20 years), Project Management (9 years), Research and Development (5 years), Operations (3.5 years), Customer Service (2.5 years), and Quality Assurance (1.5 years).

Information Technology
Project Management
Research and Development
Operations
Customer Service
Quality Assurance

Summary

Almost 20 years of experience in IT in various industries. Kristof provides both infrastructure architecture and project management expertise combined with reliable social skills.

His focused view for the essential project-aims leads to successful IT projects. Combining his wide technical knowledge and practical experience of numerous projects, workshops and technical presales meetings, he outlines show-stopers as well as easy-to-go-paths.

He likes listening to the customer’s needs for finding solutions nearest to perfect. However, he is clear and honest with all parties.

His slogan: make it simple, then simply make it.

Skills

Programming Languages

  • Python
  • Javascript
  • Typescript
  • Powershell
  • Bash
  • Php / Html5

Devops Skills

  • Microsoft Active Directory (Ad)
  • Ms Ad Sites & Trusts
  • Ms Ad: Gpos
  • Ms Ad Federational Services
  • Microsoft Azure Ad / Entra Id
  • Aviatrix
  • Hashicorp Terraform
  • Git For Versioning
  • Gitlab, Github, Circle Ci
  • Datadog For Metrics, Monitoring, Log Shipping

Cloud Solutions

  • Ms Azure Tool Stack
  • Aws Tool Stack

Operating Systems

  • Linux (Common Derivates)
  • Mac
  • Windows (Server 2008 – 2022 Enterprise)

Databases

  • Sql (Mysql, Ms Sql)
  • Postgres Sql
  • Mysql
  • Sqlite

Platforms

  • Microsoft 365
  • Microsoft Azure
  • Microsoft Powerbi
  • Amazon Web Services
  • Google Cloud Platform

Virtualization

  • Vmware Vcenter / Esxi
  • Microsoft Hyperv
  • Citrix Xen
  • Docker

Firewall

  • Fortinet / Fortigate
  • Sophos Sg / Xg
  • Securepoint
  • Watchguard
  • Opnsense

Switching

  • Cisco
  • Hpe
  • Dell

Languages

German
Native
English
Advanced

Education

Sep 2009 - Jan 2012

eves_

IT Specialist in System Integration · Braunschweig, Germany

Oct 2006 - Sep 2009

Technical University Clausthal

Information Systems · Clausthal-Zellerfeld, Germany

Oct 1997 - Jun 2006

Gymnasium Corvinianum

German High School Diploma · Northeim, Germany

Certifications & licenses

MS-500: Security Administrator

ITIL® Foundation in IT Service Management

Profile

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Frequently asked questions

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

Where is Kristof based?

Kristof is based in Wunstorf, Germany.

What languages does Kristof speak?

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

How many years of experience does Kristof have?

Kristof has at least 20 years of experience. During this time, Kristof has worked in at least 13 different roles and for 11 different companies. The average length of individual experience is 2 years and 7 months. Note that Kristof may not have shared all experience and actually has more experience.

What roles would Kristof be best suited for?

Based on recent experience, Kristof would be well-suited for roles such as: Strategic Consulting, Rapid Prototyping for AI Cloud Platform Solution, Cloud-Only Transformation Consultant.

What is Kristof's latest experience?

Kristof's most recent position is Strategic Consulting at German Grid-Battery Storage Provider.

What companies has Kristof worked for in recent years?

In recent years, Kristof has worked for German Grid-Battery Storage Provider, Cloudelligence GmbH, Immowelt GmbH / AVIV Group, noris Network AG, and Energie Baden-Württemberg.

Which industries is Kristof most experienced in?

Kristof is most experienced in industries like Information Technology (IT), Chemical, and Utility Services. Kristof also has some experience in Professional Services, Real Estate, and Automotive.

Which business areas is Kristof most experienced in?

Kristof is most experienced in business areas like Information Technology (IT), Project Management, and Research and Development (R&D). Kristof also has some experience in Operations, Customer Service, and Quality Assurance (QA).

Which industries has Kristof worked in recently?

Kristof has recently worked in industries like Information Technology (IT), Chemical, and Utility Services.

Which business areas has Kristof worked in recently?

Kristof has recently worked in business areas like Information Technology (IT), Research and Development (R&D), and Project Management.

What is Kristof's education?

Kristof attended eves_ for IT Specialist in System Integration.

Does Kristof have any certificates?

Kristof has 2 certificates. These include: MS-500: Security Administrator and ITIL® Foundation in IT Service Management.

What is the availability of Kristof?

Kristof is immediately available part-time for suitable projects.

What is the rate of Kristof?

Kristof'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 Kristof?

To hire Kristof, 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.

1000
750
500
250
Market avg: 780-940 €
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.