Firewall Experts in Düsseldorf
in minutes from over 15,000 CVs with the power of AI.Hire experts who design firewall rules, tune perimeter security, and manage VPN access for complex networks. They work with stateful and next-gen firewalls, segmentation, logging, and incident response, matched fast with vetted, available freelancers.
Meet FRATCH Experts in Düsseldorf, who have recently used Firewall
Rudolf Eggelbusch
Last position:
Datacenter Engineer, Network & Security Administrator at International insurance group
Operation and further development of the network and security infrastructure.
Monitoring, analysis and resolution of network and security incidents.
Cross-department collaboration with other specialist teams for operations, further development and reporting.
Firewall vulnerability analysis.
Firewall rule approvals.
Troubleshooting IP communication issues in the network and firewall infrastructure.
Security-critical IT infrastructure, processing of personal data, compliance with legal regulations.
Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5
Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI
Christian Wonneberger
Last position:
Software Engineer, cross-platform Application Manager at International major bank
- Creating interfaces between the legacy platform and the new container solution
- Coordinating required contributions from line units
- Moderating regular status meetings with the software vendor
- Minimally invasive conversion of TWS scheduling from the old to the new platform
- Environment: IBM Mainframe, DB2, CICS, MQ, Red Hat Linux, Oracle, Kubernetes, Kafka, Helm, GitLab, Jenkins
Rashmi Kondli
Last position:
Service Lifecycle Manager at Vodafone Group Services GmbH
Ensured 99%+ platform availability across Android, iOS, and web, maintaining zero customer-impact and zero P1 incidents through proactive monitoring and risk mitigation.
Led Incident, Problem, and Change Management with offshore operations and vendors, driving rapid issue resolution and improving product stability.
Partnered with QA teams and international OpCos to validate defects, reproduce issues, and enhance product quality using real-time customer insights.
Managed end-to-end lifecycle activities including platform migrations, infrastructure upgrades, certificate renewals, and integrations (Identity, API, Messaging).
Established operational excellence and governance by designing service support models, leading Early Life Support (ELS) and post-launch stabilization, delivering KPI reporting, and ensuring seamless transition from project to service management.
Product: Secure Net - Classic, Converged & Home Wifi Protect
Product Description: The all-in-one digital security service that helps keep you and your family safe online when using the Vodafone (Mobile and Broadband) network. Get alerts if your personal information shows up anywhere it shouldn't, whilst we find and block malicious content across all your devices using.
Clients: Vodafone OpCos - Spain, Italy, UK, Ireland, Greece, Turkey, Germany, Portugal, Romania
Role & Location: Service Manager for Lifecycle and Operations at Düsseldorf, Germany
Worked with/on: ITSM Remedy, Jira, Confluence, Splunk, Dynatrace, Tableau, Mongo DB, Google Analytics, App Follow
Ralph Konitzer
Last position:
Product Owner / Business Owner at AXIS Management Consulting GmbH
- Full product responsibility from a business perspective: requirement analysis, UX design, product strategy, and go-to-market implemented without an internal dev team using fully AI-supported development (Claude Code / Anthropic)
- Technical differentiation: KRITIS-compliant air-gapped deployment (Windows/NSIS), GDT interface for PVS integration, DATEV-LODAS export for payroll
- Managed pilot operation with initial external client (Dormagen medical practice): structured requirement gathering, test support, error analysis, and release management
- Developed rollout and sales strategy for market entry in the segment of private practices and small medical centers
- Human-in-the-Loop development principle: business decision → AI implementation → manual review → approval → release – each sprint documented in Jira (TIME project), every change traceable via co-authored commits
- Product outcome: Tauri/Rust desktop app with GDT watcher, multi-tier model (Starter/Professional/Enterprise), cloud mirror on Hetzner/Traefik, complete ISMS framework based on ISO 27001 and BSI basic protection as product foundation
- Direct method validation for the test manager role: hands-on experience with quality assurance of AI-generated products from a user perspective, review gate discipline, release approval under GDPR and the EU AI Act
Reza Sayyarzamani
Last position:
DevOps and Cloud Engineer at Rhomberg Sersa Rail Group
- Migrated backups and full workloads to AWS and Azure, including setup and management of AKS & EKS clusters.
- Automated infrastructure with Terraform & ArgoCD and implemented CI/CD pipelines with GitLab.
- Monitored systems on OpenShift 4 (on-premise) with Grafana & Prometheus, using CloudWatch and X-Ray for analysis and logging.
- Built and maintained secure network infrastructures (VPCs, SGs, WAFs, ACLs), integrated Azure Log Analytics.
- Collaborated closely with infrastructure and development teams, maintained technical documentation with Confluence, handled tickets via Jira, and promoted cloud knowledge within the company.
Andreas Wißkirchen
Last position:
Freelancer at Infrafibre Networks GmbH
- Assessing the current status (planning stage / rollout status) of the so-called inter-polygon routes
- Creating an end-to-end project plan for the individual routes, considering active and passive components and tasks
- Monitoring and controlling the implementation of the plan
- Optimizing the chosen network architecture
- Creating network and splice diagrams
Abdelhak Mahou
Last position:
Network Architect at Bechtle Managed Services GmbH
- Created as-is network documentation for a Bechtle customer
- Analyzed existing configurations and adjusted them
- Advised on Fortinet and Check Point products
- Troubleshot complex routing, switching and application issues
- Tools: MS Azure, FortiManager, Cisco Nexus & Catalyst, Cisco WLAN Controller, Citrix Netscaler SD-WAN, MS Visio, Checkpoint VSX, Wireshark
Hisham Elsharawy
Last position:
System Engineer Network & Security at Isringhausen GmbH
- Operation, maintenance and administration of the global network & security system landscape
- Troubleshooting and support in 2nd & 3rd levels and provide technical advice to other dept.
- Configuration of complex LAN/WAN/SD-WAN and WLAN network infrastructures (N5K, N9K, ASR 8000, Wireless Controller WLC9800, AP C91xx and VMware Velo Cloud)
- Control of external service providers as part of service and escalation management
- Implementation and monitoring of system updates (software upgrades, minor/major changes)
Bernhard Döpper
Last position:
Enterprise Architect. And responsible for the cross-functional architecture as well as all domains with a focus on the sales at Süddeutsche Krankenversicherung
Creation of business and technical concepts as well as support for enterprise architecture management as part of the migration to the Adesso standard insurance solutions and the renewal of surrounding systems
Interface definitions
Business analysis and creation of the business concepts for input management and sales
Creation of architecture guidelines and processes
Processing technical and business decisions in the architecture board
Definition of service processes and system management aspects
Creation of the technical target operating model
Creation of an integration architecture for AI/LLMs from the providers Commasoft and Insiders
CommaSoft (Alan) webpages and web services
Insiders for Smartfix based on web services
Creation of a question catalog for a security/regulatory check.
Analysis of threats using threat modeling / STRIDE incl. creation of a set of measures to secure the systems
System environment: Jira, Confluence, Java, Enterprise Architect, VAIT/DORA, KritisV, GDPR, IT ServiceMgmt, Adesso Ecosphere and Insure Health, DoPIX and successor product, SmartFix, SmartFlow, Zabas, Kolumbus, Clarc archive, BiPRO, AI / LLM, MS Azure, AWS, TOM/FMO
Discover over 15,000 top freelancers
Statistics of experts using Firewall
Aggregated from the professional profiles of matched freelancers.
Experience
24 years (Germany: 22 years)
Position duration
2.2 years (Germany: 2.3 years)
Positions per freelancer
14
Top business areas
Information Technology, Operations, Project Management
Top industries
Information Technology, Telecommunication, Banking and Finance
Certification focus areas
Information Technology, Project Management, Operations
Bachelor's degree or higher
63% (Germany: 74%)
Master's degree or higher
13% (Germany: 40%)
Certifications per freelancer
6 (Germany: 5)
Most common languages
German, English, Arabic
Speak two or more languages
89% (Germany: 98%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Düsseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Düsseldorf using Firewall
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What it does
A firewall controls which network traffic is allowed in or out. It protects servers, user networks, cloud links, and remote access paths by filtering packets, sessions, and applications. Strong firewall work keeps business systems reachable while blocking unwanted traffic.
Where it is used
- Internet edges and DMZs
- Branch and office networks
- VPN and remote access gateways
- Cloud networks and hybrid links
- Segmented internal zones
Companies use firewalls to protect email, web apps, file systems, and business services. In Düsseldorf, this often matters for firms that run mixed on-site and cloud setups and need clean separation between teams, sites, and partners.
Main toolsets
Firewall specialists work with vendor consoles, policy objects, NAT, routing, logging, and rule review. Common environments include Fortinet FortiGate, Palo Alto Networks, Cisco ASA, Check Point, pfSense, and cloud security groups. They also read syslog data and connect firewall events to monitoring tools.
What strong experts do
They turn business needs into clear rules, then keep those rules tight over time. Good specialists spot overlap, shadow rules, risky any-any access, and broken VPN paths before they cause outages. They also document change impact so security and operations can work from the same plan.
When to bring in help
Bring in freelance expertise when policies are messy, a migration is due, or an audit needs cleaner control. It is also useful when teams add a new site, move to the cloud, or need support during incident recovery. A short engagement can fix design gaps that internal teams do not have time to untangle.
What to expect
A solid firewall expert can review the current rule base, improve segmentation, set up safe remote access, and explain trade-offs in plain language. For Düsseldorf projects, clear communication matters if local stakeholders want on-site workshops while technical work continues remotely. The best professionals leave you with cleaner policy, not just a larger rule set.
Frequently asked questions
Before you brief your next project: the most common questions about Firewall.
A Firewall is used to control traffic between trusted and untrusted networks. It can block unwanted access, isolate sensitive systems, and support secure remote work through VPN connections. In practice, it is one of the main layers that keeps internal services available without exposing them directly.
A Firewall makes security decisions about traffic, while a router mainly forwards traffic between networks. A VPN concentrator focuses on encrypted remote connections, but it often works alongside firewall policy. In many environments, the same platform can handle all three jobs, yet the policy design still needs specialist attention.
When people say Firewall, they may mean a classic stateful appliance, a next-gen firewall, or a software firewall like pfSense. In enterprise work, names such as FortiGate, Palo Alto Networks, Check Point, and Cisco ASA come up often. The right choice depends on traffic volume, policy complexity, and how much application awareness you need.
A strong Firewall specialist understands routing, NAT, VPNs, logging, and segmentation. They should also be comfortable reading packet flows, checking DNS and certificate issues, and working with SIEM or monitoring tools. That mix matters because many problems blamed on the firewall actually come from a nearby network or identity issue.
A Firewall project can be small or broad, but it always needs a clear view of zones, services, and business owners. For a rule cleanup or VPN fix, focused context is enough. For a migration or redesign, the specialist should review dependencies, change windows, and rollback paths before touching production.
Most Firewall work can be done remotely if the team provides access to consoles, diagrams, and change processes. On-site time in Düsseldorf helps when stakeholders want whiteboard sessions, access to local infrastructure, or fast coordination during a cutover. Many companies use a mix of both to keep change control tight.
Good Firewall work is clear, minimal, and testable. Rules should have a reason, a named owner, and logging where it matters; old or duplicate entries should be removed. A good specialist also leaves documentation that another expert can follow without guessing.
Look for practical experience with the same firewall family, similar network size, and the same kind of change, such as segmentation or migration. A good Firewall expert explains risk in plain words, asks about dependencies early, and proposes a safe rollout plan. That is usually more useful than broad claims about security.
The average hourly rate of freelancers in Dusseldorf, Germany who have used Firewall in their recent projects is 105 €, which corresponds to a daily rate of about 836 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used Firewall in their recent projects, 63% hold at least a Bachelor's degree and 13% hold at least a Master's degree.
On average, freelancers in Dusseldorf, Germany who have used Firewall in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Dusseldorf, Germany who have used Firewall in their recent projects are German (100%), English (89%), and Arabic (22%).
The most common industries among freelancers in Dusseldorf, Germany who have used Firewall in their recent projects are Information Technology (78%), Telecommunication (67%), and Banking and Finance (56%).
The most common business areas among freelancers in Dusseldorf, Germany who have used Firewall in their recent projects are Information Technology (100%), Operations (100%), and Project Management (89%).
Main locations of FRATCH Experts, who have recently used Firewall
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dortmund 
Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
