Julian (Alexander Steffen) Wendel-IT Consultant
Check rate
Experience
Renewal of the active network infrastructure
As part of this project, the existing active network infrastructure was modernized and aligned for the future. The goal was to introduce a high-performance, secure, and scalable network and WLAN infrastructure, including a Network Access Control (NAC) solution to improve network security and central access control.
At the start of the project, a comprehensive requirements analysis was carried out, taking into account the technical, operational, and security-related needs of the clinic sites. Based on this, a technical tender was prepared for new switches, WLAN access points, and the NAC solution.
By successfully delivering the project, a modern, standardized, and secure network infrastructure was established that meets the growing demands for availability, mobility, and IT security in clinical operations.
Tasks:
- Support of the tender process, including technical evaluation of the offers and bidder assessment
- Lead and coordinate the entire project delivery
- Align the project process with internal stakeholders, business units, and the hospital IT team
- Manage external service providers during implementation and installation of the systems
- Monitor implementation, including quality control, project acceptance, and issue management
- Coordinate communication between hospital IT and external service providers during the NAC implementation
- Carry out escalation management for technical and organizational challenges
- Ongoing budget tracking as well as monitoring of project effort and additional costs
- Prepare decision papers on project changes, additional services, and risks for management
Restructuring of the IT network architecture
As part of this project, the existing IT network architecture was fundamentally restructured and the migration of the existing telecommunications solution to a modern VoIP system was implemented. The goal was to modernize the communication infrastructure and create a secure, high-performance, and future-proof network architecture for clinical operations.
A key part of the project was the joint creation of the network and security design in close cooperation with the hospital IT team. Requirements regarding availability, voice quality, network security, and segmentation of communication systems were taken into account.
Tasks:
- Planning and controlling the migration of the existing PBX system to a VoIP-based communication solution
- Creating the network and security design for the new infrastructure
- Defining the required network segmentation and QoS mechanisms to ensure voice quality
- Planning the individual migration steps while considering ongoing hospital operations
- Coordinating migration windows with internal stakeholders and business units
- Defining and carrying out test, acceptance, and rollback procedures to minimize operational risks
- Coordinating involved service providers and technical implementation partners
- Supporting go-live and assisting during the stabilization phase
Design and implementation of a multi-layer firewall architecture in the data center
As part of this project, a multi-layer firewall architecture was designed and implemented for the data center to sustainably strengthen the security requirements of modern hospital and enterprise infrastructures. The goal was to establish a holistic security concept based on BSI baseline protection and the defense-in-depth principle to segment and protect critical network areas.
At the start of the project, a comprehensive firewall and security concept was created, including the definition of security zones, communication paths, and segmentation requirements. The necessary feature sets, such as Application Control, IDS/IPS, VPN, high availability, logging, and central management and monitoring functions, were developed and evaluated.
During the project, various firewall vendors and solution approaches were evaluated against technical, operational, and economic criteria. In addition, support was provided in creating the technical tender documents and in vendor evaluation.
Tasks:
- Requirements analysis and design
- Evaluation of systems available on the market
- Support with tender preparation
- Planning and controlling the implementation of the new firewall infrastructure
- Migration of legacy systems into the new security architecture
- Coordination and management of external service providers and implementation partners
- Creation of technical operations and migration documentation
- Support during go-live and stabilization of operations
Renewal of the active network infrastructure & WLAN rollout at 4 clinic sites
As part of this project, the modernization of the active network infrastructure and the site-wide WLAN rollout across four clinic locations were planned and managed. The goal was to improve network stability, performance, and WLAN coverage, as well as to create a future-proof infrastructure for clinical and administrative applications.
The focus of the project was the control of replacing existing network components with new Cisco switches and WLAN access points. The implementation measures were coordinated across sites and carried out while maintaining ongoing clinical operations.
Tasks:
- Planning and controlling the installation of new switches and WLAN access points
- Coordination with internal stakeholders regarding scheduling, process alignment, and definition of suitable migration windows
- Close cooperation with project management for the renewal of the passive infrastructure
- Carrying out project-specific risk management, including assessment and tracking of potential operational risks
- Managing and coordinating external service providers during the implementation phase
- Reviewing and approving hours worked for billing in accordance with the tender and bill of quantities
- Carrying out project acceptance, including issue management and follow-up on open items
Implementation of a homogeneous network infrastructure at multiple clinic sites
As part of this project, a standardized and homogeneous network infrastructure was designed and implemented for various clinic sites. The goal was to unify the existing switching landscape to improve stability, scalability, security, and operational management within the site networks.
A key part of the project was the creation of a site-wide Layer 2 switching design, taking into account technical, operational, and high-availability requirements. Based on the criticality of each site and the individual infrastructure needs, suitable switch vendors and hardware models were selected.
For particularly critical facilities, especially acute care hospitals and central data center sites (ZRS), a redundant Layer 2 switching infrastructure was designed and implemented to ensure a highly available network supply.
Tasks:
- Design of the L2 switching architecture
- Definition of standardized switch configurations
- Planning and preparation of switch migrations at the clinic sites
- Scheduling and coordination of migration windows
- Managing and coordinating external service providers during the implementation phase
- Defining monitoring and operational requirements
- Creating technical documentation and operations manuals
- Carrying out the hypercare phase to stabilize operations after the migration
IT Consultant, Project Manager, Network Administrator, Firewall Administrator
Tasks:
- Support for customer projects in the area of network and IT security
- Design and implementation of corporate networks
- Design and implementation of network security architectures (firewalls, NAC, monitoring)
- Project management for network rollouts (firewalls, switches)
- Development of IT security processes
- IT security consulting
Network & Firewall Administrator, 3rd/2nd Level Support
Tasks:
- 2nd-level support
- Monitoring of platforms, networks, and systems
- Acceptance, processing, and documentation of incidents in the ticket system
- Administration and implementation of firewall and security solutions
- Documentation of services provided
- Collection and analysis of technical customer requirements in existing or new IT environments
- Configuration of switches and firewall systems
Design and implementation of a centralized IT infrastructure for 75 clinic sites
As part of this project, the conception, design, and implementation of a centralized IT infrastructure for a total of 75 clinic sites was carried out. The goal was to create a highly available, secure, and scalable network architecture for the standardized connection of all sites to the central data center.
The focus was on developing a future-proof network and security concept, including the evaluation and execution of a proof of concept (PoC) for modern firewall systems. The primary connection of the sites was via wired WAN connections with automated failover to LTE-based backup connections to ensure high availability.
In addition, the project included the design of the entire network topology, including the selection and implementation of dynamic routing protocols for efficient and resilient traffic control between the sites and the data center.
Tasks:
- Development of a connection concept
- Selection and evaluation of the appropriate hardware components
- Carrying out a PoC
- Planning and managing the hardware rollout at all clinic sites
- Coordination of service providers and internal stakeholders
- Scheduling and coordinating migration windows for the site connections
- Technical management of the implementation
- Carrying out the hyper-care phase after go-live to ensure stable operation and fast incident management
- Documentation
Industry Experience
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Experienced in Information Technology, Telecommunication, and Healthcare.
Business Area Experience
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Experienced in Information Technology, Project Management, Operations, Customer Service, and Procurement.
Summary
I am responsible for the planning, coordination, and successful delivery of demanding IT infrastructure and transformation projects at the intersection of network technology, information security, and project management. My focus is on healthcare and complex managed service environments, where availability, compliance, and information security are critical success factors.
My area of responsibility includes developing future-proof network and security architectures, modernizing data center and site infrastructures, and introducing and optimizing technologies such as WLAN, VoIP, Network Access Control (NAC), firewalls, and IT asset management. I support projects end to end – from strategy and requirements analysis to tenders and vendor evaluations, through implementation, operational stabilization, and handover to regular operations.
I combine solid technical expertise with structured project management and a strong ability to coordinate different interests from management, business units, IT, and external partners. I keep an eye on risks, budgets, deadlines, and quality targets, as well as regulatory requirements and the long-term operability of the solutions. My goal is to translate technical complexity into clear decision-making foundations and to establish sustainable, economical, and security-oriented solutions.
My qualifications are based on a Bachelor of Science (B.Sc.) in Computer Science, a Master of Engineering (M.Eng.) in IT Security & Forensics, and internationally recognized certifications, including CISSP and PRINCE2 Practitioner.
Languages
Education
WINGS HS-Wismar
M.Eng. IT Security & Forensics · IT Security & Forensics · Wismar, Germany
HS-Mannheim
B.Sc. · Computer Science · Mannheim, Germany
Certifications & licenses
Certified Information Systems Security Professional
ISC2
Certified in Cybersecurity
ISC2
PRINCE2 Practitioner
PeopleCert
Statistics
Experience
Expertise
Qualifications
Profile
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