Network Segmentation Implementation Consultant

Network Segmentation (Micro-Segmentation) Implementation Consultant Location: Amsterdam, Netherlands (Hybrid) Start Date: ASAP Duration: Until 31 December 2026 (extension expected) Client: International Banking Institution Contract Type: Freelance The Assignment For one of our international banking clients, we are looking for an experienced Network Segmentation Consultant to support a large-scale cyber resilience and DORA compliance initiative. The client is implementing a network segmentation program focused on protecting critical applications through the establishment of security zones and the restriction of network communications between environments. The segmentation architecture is being deployed using Cisco ACI, in collaboration with the client's infrastructure partner. As the current consultant is leaving the project, we are seeking a hands-on technical expert who can seamlessly take ownership of the network segmentation workstream and drive the implementation forward. Responsibilities Analyze and validate network segmentation designs and findingsReview and optimize security zone structures, Cisco ACI EPGs, VLANs, routing configurations and firewall rule setsDefine and implement micro-segmentation solutions for critical applicationsPerform firewall rule-base reviews to identify gaps, redundancies and compliance issuesMap application data flows and connectivity between systems and security zonesSupport the migration of applications towards the target network security architectureReduce gaps between current-state (as-is) and target-state (to-be) environmentsCollaborate closely with networking, infrastructure and cybersecurity teamsEnsure alignment with internal security standards and regulatory requirements Required Experience Strong hands-on experience in network security and network architectureExpert knowledge of: IP Addressing (CIDR)Routing and switchingNetwork protocolsFirewall technologies and rule managementVLAN design and segmentationExperience with Cisco ACI and software-defined networking environmentsProven experience with network segmentation and/or micro-segmentation projectsAbility to independently assess complex network infrastructures and propose secure designsStrong stakeholder management and communication skills Nice to Have Knowledge of NIST Cybersecurity Framework (NIST CSF)Familiarity with DORA and banking regulatory requirementsUnderstanding of MITRE ATT&CKExperience within financial services or highly regulated environments Why This Assignment? Long-term engagement within a major international banking environmentHighly visible cybersecurity and regulatory compliance projectStrong focus on Cisco ACI, network security and micro-segmentationOpportunity to contribute directly to the client's cyber resilience strategy