06/24/2026 updated

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info: not available until 01/01/2028

Managing and Coding Cloud Architect - Freelancer

Gliwice, Poland
Worldwide
1995
Gliwice, Poland
Worldwide
1995

Profile attachments

Resume.Jerome_Mac_Lean-Europe-2025-Q3.4_short.pdf

InnovationAgile MethodologyArtificial IntelligenceAviationBash ShellTelecommunicationsBig DataCloud ComputingCloud EngineeringLinuxDevOpsFinancesInformation Technology Infrastructure Libraries (ITIL)Machine LearningPRojects IN Controlled Environments Version 2 (PRINCE2)AnsibleStakeholder ManagementKubernetesSafety PrinciplesTerraformData PipelineJenkins
With more than 25 years of experience in the Aviation, Service Provider, Telco, and Finance market I had the pleasure to work with the largest companies in Europe and beyond. As Solution Architect I’ve enjoyed designing large scale observeability solutions optimizing business assurance and running costs.

While companies moved to the cloud, I've moved with them advancing to business-driven Cloud Architect using the same proven frameworks. As a trusted advisor I support Business Owners with making informed cloud and platform/landing zone decisions balancing the costs of a solution with business, process, and organizational requirements.

Offering enterprise-grade solutions and agile hands-on experience in cloud, Kubernetes, security, data pipelines, and monitoring I’m also able to free up your Application Developers or Cloud/DevOps Engineers by designing and realizing the best cloud architecture. This by fully leveraging deterministic Cloud as Code (CICD pipelines, Terraform, Packer, Ansible, …) and meaningful cloud and workload monitoring.

Being seen as a team player, I like to listen to people and try to understand their needs. Consolidate all thoughts, use a methodical and structured approach based on best practices, and make it work for all parties (win-win). This can be as simple as a talk over coffee or a formal presentation with all stakeholders to present possible solutions.

In a constantly changing IT landscape today’s knowledge is old tomorrow. Therefor I like to follow new trends and educate myself with the latest best practices in the market. This enables me to continuously improve my role and responsibilities.

Special interests go out to be part of the clients’ digital journey and the more complex cloud environments like multi-tenant Kubernetes, multi-region cloud, and new technologies like Big Data and AI/Machine Learning. Ideally where agility, innovation, and ‘continuous everything‘ are integral parts of that journey.

Experience

Professional experience10+ years
Freelancer since2019

Languages

GermanBasic knowledgeEnglishFluentDutchNative speakerPolishBasic knowledge

Project history

Management and Technical Architecture of private on-prem cloud environment (approx 6000 nodes)

Internet & IT

500-1000 team member

Cloud Architect - Freelancer

CrossLogic Consulting - Freelancer

Internet & IT

< 10 team member

Managing and Coding Cloud Architect supporting both Business Owners, Cloud/DevOps Engineers, and Application Developers across Europe to run their mission critical services on the right cloud solution.

Come and find me at:
http://www.crosslogic-consulting.com
https://www.linkedin.com/in/maclean/

Cloud Architect/DevOps - Multi-tenant IoT data analytics cloud platform

ADB SG

Other

>10.000 team member

Leading Aviation Airport Management Vendor - Antwerp, Belgium - Columbia, Ohio - Worldwide
As leading cloud architect, I was responsible for advising business owners on their cloud strategy. Offer platform roadmap options for mid- and long-term financial and time-to-value goals. Create detailed platform design, tech stack, and landing zone solutions, incl governance.
As coding cloud architect, I was asked to lead the technical realization of the proposed data analytics cloud platform. This included the security, observability, and actual onboarding of platform tenants to create the targeted value.

Tech stack: Azure (IoT Hub, EventHub, Databricks, AKS, Log Analytics, Application Insights, DevOps, ...), Kafka, MSSQL, PostgreSQL. But also native Kubernetes (reflector, reloader, cert-manager, istio, Grafana/Prometheus/Thanos, EFK stack, calico, gatekeeper, ...), terraform/terragrunt, python.Leading Aviation Airport Management Vendor - Antwerp, Belgium - Columbia, Ohio - Worldwide As leading cloud architect, I was responsible for advising business owners on their cloud strategy. Offer platform roadmap options for mid- and long-term financial and time-to-value goals. Create detailed platform design, tech stack, and landing zone solutions, incl governance. As coding cloud architect, I was asked to lead the technical realization of the proposed data analytics cloud platform. This included the security, observability, and actual onboarding of platform tenants to create the targeted value. Tech stack: Azure (IoT Hub, EventHub, Databricks, AKS, Log Analytics, Application Insights, DevOps, ...), Kafka, MSSQL, PostgreSQL. But also native Kubernetes (reflector, reloader, cert-manager, istio, Grafana/Prometheus/Thanos, EFK stack, calico, gatekeeper, ...), terraform/terragrunt, python.

Skills: IT Strategy · Enterprise Architecture · Data Pipelines · Azure IoT · Cloud-Native Architecture · Cloud Infrastructure

Senior Enablement Lead - Highly secure private cloud

EuroControl

Other

>10.000 team member

European Aviation Traffic Control - Brussels, Belgium
Design and realization of a fully hardened and secured so called Digital Platform hosting highly sensitive aviation applications and data. The multi-instances OpenShift platform spanned both the Azure cloud and on-prem using the same code base.
As part of a multi-team setup I was tasked with all security aspects, observability, and Infra as Code governance. Apart from cloud, infra, and container orchestration design special deep focus went out to traffic and platform hardening, secret and PKI management, and full audit logging.

Tech stack: Azure, vSphere, OpenShift (Kiali/Istio), Nexus, Jenkins, terraform, ansible, helm, python, groovy, Nginx (ingress security), Squid (egress security), HashiCorp Vault and Cert-Manager (PKI management), Grafana, Prometheus, ELK stack.European Aviation Traffic Control - Brussels, Belgium Design and realization of a fully hardened and secured so called Digital Platform hosting highly sensitive aviation applications and data. The multi-instances OpenShift platform spanned both the Azure cloud and on-prem using the same code base. As part of a multi-team setup I was tasked with all security aspects, observability, and Infra as Code governance. Apart from cloud, infra, and container orchestration design special deep focus went out to traffic and platform hardening, secret and PKI management, and full audit logging. Tech stack: Azure, vSphere, OpenShift (Kiali/Istio), Nexus, Jenkins, terraform, ansible, helm, python, groovy, Nginx (ingress security), Squid (egress security), HashiCorp Vault and Cert-Manager (PKI management), Grafana, Prometheus, ELK stack.

Skills: Cloud-Native Architecture · Data Architecture · Information Security Management · Microsoft Azure · Container Orchestration

Lead Cloud Architect - Multi-tenant container platform for large European energy enterprises

E.ON

Energy, Water & Environment

>10.000 team member

Leading German Utilities Company (2020 – 2022), Essen
Design and realization of the company’s central Managed Kubernetes platform (self-hosted CaaS) hosting over 100 application teams across Europe. I had the pleasure to architect and lead the entire implementation. My efforts resulted in a high optimization of running costs by harmonizing organically grown decentralized clusters and enhancing service performance and assurance (security, HA, DR, and business continuity (RTO/RPO)).

As a follow up I was asked to design and realize in-depth service observability and control comprising log- metrics-, and cost- management, alerting, and security monitoring. Delivery included extensive documentation and training of administrators and 3rd party operators.

Tech stack
Kubernetes (Calico/NetworkPolicies, Kubenet, Admission Control/OPA Gatekeeper/Rego, AAD and cloud integration), Azure (AKS, VMSS, ACR, AppGW/AGIC, Vault, Storage, Functions, API Management, CosmosDB, Networking, Security), GitLab (incl CI), JFrog Artifactory, Harbor, MinIO, Aviatrix, terraform/terragrunt, helm, kustomize, python, nodeJS, nginx, MariaDB/MySQL, PostgreSQL, MongDB, RabbitMQ.
Observability: Azure Monitoring, Diagnostics, and Log Analytics. Prometheus, Grafana, AlertManager, fluent-bit/fluentd, Splunk, kured, kubecost, Kuberhealthy, velero/restic, AppDynamics, AquaSec/starboard, Kafka.

DevOps CICD / Cloud Architect - Migration to new Cloud platform

Futurice

Automotive & Vehicle Manufacturing

500-1000 team member

Leading International Automotive, Böblingen, Germany (via Futurice)
Total redesign of an organically grown Jenkins CICD pipeline based on a holistic library and IaC approach. The fully automated workflow enabled application development teams to forget about Jenkins administration, yet having full control over their application build and deployment.

Design and migration of the multi-location OpenShift environment to a native onsite multi-cluster Kubernetes environment. The advanced implementation of resource policies enabled better cost control and simplification/elimination of the cloud administration.

Senior Consultant

serima Consulting AG/GmbH

Internet & IT

10-50 team member

Roles

  1. DevOps Architect
  2. Business Developer
  3. IT Solution Architect
  4. Product Owner (Scrum) (Telefonica GmbH)
  5. Solution Owner Mobile and Transport (Swisscom Schweiz AG)
  6. Project Manager (P&T Luxembourg)
  7. Solution Integrator
  8. Authorized Trainer (IBM Premium Partner)

 

Job description

Senior Consultant – DevOps Architect
Within serima I had the responsibility to design and implement a DevOps CICD best practice. This concept is now used for the delivery of solutions in all new projects. Every solution has its own ready-to-pull docker development environment, including unit testing capabilities. The “DevOps CICD Pipeline” itself (Jenkins, Nexus, GitLab) prepares the docker images ready for integration testing and deployment. In all cases using Infrastructure as Code (IaC) at its core.

Deployment methods encompass:

  • Manually or on-prem Docker environment
  • AWS Cloud (ECS, EC2) using Packer, Terraform, and Ansible
  • Kubernetes (bare-metal, EKS, or EC2)
 

Senior Consultant – Business Developer Cloud Monitoring
Our team was tasked with delivering future business opportunities to our CEO. Part of the team was responsible for assessing market reports and conducting vendor communication. My responsibilities mainly targeted setting up proof of concepts of cloud solutions, which in turn directly enabled serima’s major client to move some applications to the cloud already.

Activities include:

  • Market analysis
  • Feasibility study (Professional Services or SaaS)
  • Setting up Kubernetes, AWS (EKS, ECS, EC2)
  • Setting up ELK Stack / Elastic Search, Splunk, Prometheus, Grafana
 

Senior Consultant – Service Management and Correlation (Root Cause Analysis)
As Senior Consultant I led complex projects in the larger Service Provider and Telco customers. Main focus area’s encompassed RCA correlation and Service Management architectures for both Mobile (LTE, UMTS, GPRS), IP, and Transport (SDH, WDM). The designs were mainly based on the IBM Tivoli Netcool framework (OMNIbus, Impact, TBSM, ITNM), with (open source) additions like edgeSuite, Pentaho PDI Kettle, and NodeJS solutions.

 

Activities include:

  • Support European customers (mainly Switzerland, Germany, The Netherlands, Sweden, Luxembourg, and Poland) to setup and/or enhance their Service Assurance environment to the constant changing managed services demand.
  • Setup and/or enhance the supporting ITIL processes as Change Management, Release and Deployment Management, Incident and Problem Management, and independent Test Management.
  • Leading responsibilities in project communication and planning, design, and implementation of the agreed upon solution using agile project management (Scrum).
  • Demo sessions and proof of concept (POC) in a controlled technical lab or within the customer’s environment.

 

Trainer
Facilitate formal IBM training (IBM Premium Partner) or tailored workshops, both on customer premises and formal training sites.

Managing Director Eastern Europe Operations

serima Consulting AG/GmbH

Internet & IT

10-50 team member

Job description

As a result of constant growth of serima Consulting in both Germany and Switzerland
management has decided to enhance operations to Eastern Europe. As an extension of
Western Europe business, I was tasked with:

  • Representing the company in Poland and Eastern Europe.
  • Relaying and implementing company policies shared by serima Consulting GmbH.

 

Serima management has decided to close the Polish office in March 2007 for reasons of:

  • Different business and administration culture.
  • Long lead time.
  • Lack of finding skilled resources

Senior Consultant

Predictive Systems

Internet & IT

500-1000 team member

Roles

  1. OSS and Network Management Architect
  2. Project Lead
  3. Pre-sales Engineer
  4. Partner Manager

 

Job description

  • Assist and advise the customer on translating operational and organizational challenges into technical OSS and network management solutions. Responsible for the project planning, design, and implementation of the agreed upon solution.
  • Setup of the network management (NMS) practice within the Dutch organization as practice leader.
  • Support sales in a pre-sales phase as Subject Matter Expert in the OSS and network management discipline.
  • Assist the customer in justifying an ICT investment (QBA).
  • Assessment of the customer NMS solution, gap analysis, and product selection.
  • Facilitate training, demo sessions, and proof of concept (POC) for the customer and internal personnel.
  • Keep track of the ICT market developments.

 

Partner Manager

Manage the partner relations with regard to network and security management.

Senior Network Systems Consultant

International Network Services (INS)

Internet & IT

5000-10.000 team member

Roles

  1. Network Management Architect
  2. Project Lead
  3. Pre-sales Consultant
  4. Trainer

 

Job description

  • Assist and advise the customer in the Nordic area on translating operational and organizational challenges into technical network management solutions.
  • Build and enhance Network and Service Operations Centers (NOC/SOC), including design and implementation of the network management and OSS/service management solutions/technology.
  • Support the network management (NMS) practice within the Dutch organization.
  • Support sales in a pre-sales phase as Subject Matter Expert in the asset, network, and security management discipline.
  • Assessment of the customer NMS solution, gap analysis, and product selection.
  • Facilitate proof of concept (POC) for the customer and internal personnel.
  • Keep track of the ICT market developments.

 

Trainer
Technology training of Lucent products and solutions out of the Lucent training center. Methodology training among Time Management, Presentation Skills, and Technical Writing.

Technical Support Engineer, Technical Product Manager

KPN Telecom

Internet & IT

5000-10.000 team member

Roles

  1. Technical Product Manager
  2. Information Technology Trainer
  3. Technical (2nd line) Support Engineer

 

Job description

Technical Product Manager

  • Responsible for the evaluation of new products and creation of new solution offerings in collaboration with Commercial Product Management.

 

Information Technology Trainer

  • Write, promote, and offer formal trainings in the area of IT and Network Management.

 

Technical Support Engineer

  • Technical support of 1st line Field Engineers.
  • Conflict handling and representation of the support department.
  • Presales support of Sales Consultants and Commercial Product Managers (CPM).
  • Perform presales POC in the customer environment.
  • Maintain an in-depth knowledge of the latest technologies and strategies (focus area).
  • Transfer knowledge to the organization.

System Specialist

Unisource Business Networks

Roles

  1. Information Analyst
  2. Field Engineer

 

Job description

  • Nationwide responsibility for building and maintaining the Unisource public data communication network and services.
  • As field engineer resolve network incidents and problems on Unisource POP sites and customer sites.

Certificates

TOGAF® Enterprise Architecture V10

The Open Group

2024

Azure Solutions Architect Expert

Microsoft

2022

AWS SysOps Administrator – Associate

Amazon Web Services (AWS)

2022

AWS Solution Architect - Associate

Amazon Web Services (AWS)

2020

Certified Kubernetes Administrator (CKA)

CNCF [Cloud Native Computing Foundation]

2019

AWS Cloud Practitioner

Amazon Web Services (AWS)

2019

PRINCE2 Practitioner

AXELOS Global Best Practice

2014

ITIL V3 Expert in IT Service Management

APM Group

2013


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