Network Security

Knows basic network security concepts for network engineering and can apply them in typical tasks. Uses standard tools and follows established team practices. Understands when and why this approach is used.

Understands basic network security concepts: TCP/IP model, common ports and protocols, firewall rule logic. Can run Nmap scans, read packet captures in Wireshark, and identify open services on a target host under supervision.

Tests network security: port scanning (nmap), service enumeration, SSL/TLS configuration (testssl.sh). Understands network segmentation and firewall rules.

Understands basic Network Security concepts. Follows security guidelines. Recognizes common code vulnerabilities.

Understands fundamental network security principles relevant to telecom: firewall basics, VPN tunneling concepts, and traffic encryption with TLS/IPsec. Can configure basic ACLs on network equipment and recognizes common network-level attack vectors such as ARP spoofing and DNS poisoning.

Confidently applies network security for network engineering in non-standard tasks. Independently selects the optimal approach and tools. Analyzes trade-offs and proposes improvements to existing solutions.

Independently performs network penetration testing: conducts host discovery, service enumeration, and vulnerability scanning across subnets. Exploits misconfigured firewalls, weak VPN setups, and unpatched network services. Writes clear findings on network segmentation gaps and proposes remediation for IDS/IPS evasion techniques discovered during engagements.

Conducts network security assessment: vulnerability scanning (Nessus), network architecture review, traffic analysis (Wireshark). Tests DNS security, DDoS resilience.

Independently monitors and investigates network security events using SIEM and IDS/IPS platforms. Correlates firewall logs, NetFlow data, and DNS queries to detect lateral movement and C2 communication. Tunes IDS signatures to reduce false positives and documents network-based indicators of compromise for incident response playbooks.

Independently implements network security measures in telecom systems: configures IPsec/GRE tunnels, sets up VLAN segmentation for signaling and media planes, and enforces TLS for SIP trunking. Monitors network anomalies with flow analysis tools and responds to DDoS attempts targeting telecom infrastructure.

Expertly applies network security for network engineering to design complex systems. Optimizes existing solutions and prevents architectural mistakes. Conducts code reviews and trains colleagues on best practices.

Designs complex network penetration testing methodologies: multi-stage attack chains exploiting network trust relationships, pivoting through segmented networks, and advanced IDS/IPS evasion. Mentors junior pentesters on network protocol analysis and firewall bypass techniques. Evaluates zero-trust network architectures and identifies gaps in micro-segmentation implementations.

Designs network security testing: automated network scanning pipeline, infrastructure penetration testing, zero-trust architecture validation. Tests microsegmentation.

Designs network threat detection strategies: builds advanced SIEM correlation rules for multi-stage network attacks, architects honeypot deployments for early threat detection, and creates network forensics procedures. Mentors analysts on deep packet inspection, encrypted traffic analysis, and advanced persistent threat identification across network layers.

Designs secure network architectures for telecom platforms: end-to-end encryption for signaling protocols (SIP-TLS, SRTP), multi-layer DDoS mitigation strategies, and secure interconnect designs between carrier networks. Mentors team on network security hardening for SS7/Diameter/GTP protocols and evaluates vendor solutions for telecom-grade firewalls and session border controllers.

Establishes network security standards for the network engineering team and makes architectural decisions. Defines the technical roadmap incorporating this skill. Mentors senior engineers and influences practices of adjacent teams.

Leads the team's network penetration testing practice: defines engagement scoping for network assessments, standardizes network attack toolchains and reporting templates, and prioritizes remediation across firewall, VPN, and segmentation findings. Builds team capabilities in advanced network exploitation and coordinates purple-team exercises focused on network defense validation.

Defines network security testing standards: periodic assessment schedule, scope requirements, reporting. Coordinates with infrastructure team. Implements continuous network monitoring.

Leads the team's network security monitoring and response capabilities: defines SIEM use cases for network threat detection, establishes SLAs for network incident triage, and builds runbooks for common network attack patterns. Coordinates with SOC and infrastructure teams to ensure comprehensive network visibility and drives adoption of NDR (Network Detection and Response) solutions.

Leads network security strategy for the telecom development team: defines security standards for all network protocol implementations, establishes secure-by-default configurations for SBC and firewall deployments, and coordinates with NOC on incident response procedures. Drives team adoption of automated network security testing and ensures compliance with telecom security regulations (3GPP, GSMA).

Shapes network security strategy for network engineering at the organizational level. Defines best practices and influences technology choices beyond their own team. Is a recognized expert in this area.

Defines the organization's network penetration testing strategy and standards: establishes red-team network attack frameworks, sets maturity benchmarks for network defense across all departments, and drives executive-level reporting on network risk posture. Builds cross-functional partnerships with network engineering and cloud teams to embed offensive security validation into infrastructure change management processes.

Designs network security strategy: zero-trust networking validation, micro-segmentation testing, global network security assessment. Defines organizational network security framework.

Defines the organization's network threat intelligence and detection strategy: architects enterprise-wide network security monitoring covering on-prem, cloud, and hybrid environments. Establishes network forensics standards, drives investment in NDR and SIEM capabilities, and sets organizational benchmarks for mean-time-to-detect network-based threats. Represents the company in industry threat-sharing consortiums and shapes network security policy at the board level.

Shapes the organization's network security vision for telecom infrastructure at scale: defines enterprise standards for carrier-grade network protection, drives adoption of 5G security frameworks (NESAS, SCAS), and establishes cross-departmental governance for signaling security (SS7, Diameter, HTTP/2). Influences industry standards bodies on telecom network security and evaluates emerging threats to next-generation network architectures.