Véritable pilier de la connectivité moderne, l’ingénieur réseau garantit le bon fonctionnement, la sécurité et la performance des infrastructures informatiques.
Key points:
- The network engineer ensures the availability and security of communication systems.
- This field encompasses several specializations: security, cloud computing, telecommunications, and automation.
- Key skills include network protocols, cybersecurity, and IaC.
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What does a network engineer do, and why is this role essential?
A network engineer is a specialist in IT communications infrastructure. They design, deploy, manage, and secure the telecommunications networks that support data exchanges between users, applications, and devices. Their role is to ensure reliable, high-performance, and secure connectivity in response to businesses’ growing demands for availability, bandwidth, and cybersecurity.
Its main responsibilities include:
- Design and Architecture: He designs the network architecture, taking into account the company’s needs, including the geographic distribution of teams (e.g., Europe and Asia). He selects the appropriate types of connections (on-premises networks, inter-site networks, VPNs) and the right equipment (routers, switches, firewalls). He must ensure performance, security, and scalability, despite constraints related to distance, bandwidth, and budget.
- Administration and Operations: Configure and maintain network equipment, manage the IP address plan, monitor traffic and performance, diagnose issues, ensure security, document the infrastructure, and maintain quality of service (QoS).
- Securing communications: Implement network security policies (firewalls, segmentation, VPNs, IDS/IPS), ensure compliance with standards (ISO 27001, GDPR, etc.), and anticipate threats (cyberattacks, intrusions).
- Support and Incident Resolution: Respond quickly in the event of an outage, congestion, or security breach to restore connectivity and ensure the continuity of digital services.
- Market Intelligence and Innovation: Monitor technological developments (SDN, cloud networking, edge computing, 5G, etc.) to anticipate business needs, propose tailored solutions, and support digital transformation and infrastructure optimization projects.
Why is his role essential?
In an environment where information systems have become the foundation of business operations, a network failure can have major consequences: production shutdowns, data loss, damage to the company’s reputation, or even security breaches. The network engineer therefore serves as an invisible yet indispensable pillar for seamless communications and system resilience.
Furthermore, with the rise of the cloud, remote work, the IoT, and cyberthreats, its role extends beyond purely technical matters: it has become a strategic player, ensuring the interoperability, flexibility, and cybersecurity of digital infrastructures.
Are you interested in a career as a network engineer? Find out here how Qim info’s systems and network experts helped a Swiss medical company modernize its Windows environment.
The Main Specializations in Network Engineering
Depending on the structure, size, or technological challenges of the organization, network engineers can specialize in several areas:
Network and Security Engineer
As a specialist in critical infrastructure, the network and security engineer designs, deploys, and secures the company’s network architectures. He or she ensures the availability, confidentiality, and integrity of data exchanges, while preventing intrusions and attacks targeting information systems.
Main areas of focus:
- Perimeter Security: Configuration and management of firewalls, proxies, IPsec/SSL VPNs, IDS/IPS, and SBCs. He implements threat-based filtering policies and monitors incoming and outgoing traffic to reduce the attack surface.
- Network segmentation: Implementation of VLANs, DMZs, trusted zones, and quarantine zones. This segmentation helps isolate critical resources and limit lateral movement in the event of a compromise.
- Access Management and Security Policies: Implementation of strict access controls (NAC, 802.1X, ACL, RBAC), strong authentication (MFA, SSO, RADIUS, LDAP), and dynamic security policies based on roles and context.
- Monitoring and Detection: Network monitoring using SIEM tools, NetFlow, security logs, and real-time alerts. This role works in collaboration with the SOC teams to analyze incidents, trace attacks, and propose corrective measures.
- Compliance and Resilience: Ensures compliance with regulatory standards (GDPR, ISO 27001, NIS2, ANSSI). The role involves participating in security audits, defining disaster recovery and business continuity plans, and drafting security procedures.
Protocols and technologies mastered:
, TCP/IP, DNS, DHCP, OSPF, BGP, IPsec, SSL/TLS – Cisco, Fortinet, Palo Alto, and Check Point equipment – monitoring tools (Zabbix, Centreon), secure cloud solutions (AWS, Azure, GCP) – Zero Trust, SASE, and ZTNA concepts.
Strategic Role:
The Network and Security Engineer plays a central role in operational cybersecurity. They work closely with IT, SOC, DevOps, and Cloud teams to ensure a robust, scalable, and secure network. They support digital transformation projects, particularly those involving network virtualization (SDN), hybrid infrastructures, and the secure integration of cloud services.
Cloud Network Engineer
As a specialist in hybrid and cloud network infrastructures, the cloud network engineer designs, deploys, and optimizes connectivity for multi-cloud and on-premises environments. He or she ensures the performance, security, and resilience of communications between application services, users, and cloud resources.
💡 Don’t confuse this role with that of a Cloud Engineer, whose primary responsibility is to design, deploy, and manage cloud infrastructures and services (AWS, Azure, GCP, etc.). While their networking knowledge is useful, it is not always central to their job.
Main areas of focus:
- Cloud Connectivity and Hybridization: Design and deployment of secure connections between on-premises sites and public clouds (AWS Direct Connect, Azure ExpressRoute, Google Cloud Interconnect). He implements hybrid or multi-cloud architectures that ensure low latency and high availability.
- Cloud Virtual Networks: Creation and management of virtual networks (VPC, VNet), subnets, security groups (NSG, SG), cross-region routing, and load balancing. He applies network segmentation strategies to isolate environments (production, development, testing) and ensure traffic isolation.
- Automation and Infrastructure as Code: Using tools such as Terraform, Ansible, or CloudFormation to automate network configuration. It incorporates DevOps/NetDevOps best practices to ensure the reproducibility, traceability, and scalability of infrastructure.
- Performance and Monitoring: Implementation of monitoring tools to monitor network traffic, inter-regional latency, and bandwidth. It optimizes performance by adjusting routes, peering, and QoS policies, and by reducing points of failure.
- Cloud Network Security: Configuration of cloud-native firewalls (AWS NACLs, Azure Firewall), management of IPsec/SSL VPNs, identity-based access control (IAM), microsegmentation, and Zero Trust policies. He works with security teams to ensure a compliant and robust security posture.
Technologies and tools mastered:
, VPC/VNet, BGP, IPsec, NAT Gateway, Load Balancer, Transit Gateway – AWS, Azure, GCP – Terraform, Ansible, Git – monitoring tools (CloudWatch, Azure Monitor, Datadog) – SD-WAN, SASE.
Strategic Role:
The cloud network engineer is a key player in digital transformation, ensuring seamless, elastic, and secure connectivity in highly scalable environments. They facilitate the integration of SaaS, PaaS, and IaaS solutions while contributing to the modernization of enterprise networks. Their role extends to developing strategies for optimizing network-related cloud costs.
Telecom Network Engineer
As an expert in voice and data communications, the telecommunications network engineer is responsible for designing, deploying, securing, and optimizing the company’s communication systems. They ensure reliable, high-performance, and uninterrupted communication, regardless of location or the communication method used (VoIP, data, IP-based videoconferencing).
Main areas of focus:
- IP Telephony (VoIP): IP-PBX configuration (Cisco, Alcatel, Asterisk, etc.), SIP trunk management, integration with collaboration platforms (Microsoft Teams, Zoom, Webex), resource sizing, and audio quality monitoring (MOS, jitter, latency).
- Inter-site connectivity: deployment of MPLS, SD-WAN, or IPsec VPN solutions, ensuring service continuity between remote sites, with advanced management of latency, jitter, redundancy, and network resilience.
- Quality of Service (QoS): Implementation of policies to prioritize real-time traffic (voice, video), proactive monitoring, and performance optimization to ensure an optimal user experience.
- Signaling and routing protocols: proficiency in VoIP protocols (SIP, H.323) for signaling, and dynamic routing protocols (BGP, OSPF) for data traffic. Integration of security mechanisms such as SRTP encryption, Session Border Controllers (SBCs), and application firewalls.
Technologies and tools mastered:
Telecom network engineers rely on a wide range of specialized technologies:
- VoIP and IPBX Solutions: Cisco Call Manager, Alcatel OXE, Asterisk, 3CX
- SIP Trunks and SBCs: Audiocodes, Oracle, Cisco CUBE
- VoIP Quality Monitoring Tools: SolarWinds VoIP Monitor, Wireshark, MOS Score Analyzer
- Protocols and standards: SIP, H.323, RTP, SRTP, QoS (DiffServ, CoS), Voice VLAN
- Integrated collaboration platforms: Microsoft Teams, Zoom, Cisco Webex, Avaya
- Routing and Inter-Site Connectivity: MPLS, BGP, OSPF, IPsec, SD-WAN (Meraki, Fortinet)
Strategic Role:
It plays a central role in multi-site architectures, contact centers, and hybrid or cloud environments. It supports companies in their digital transformation projects, particularly through migration to UCaaS (Unified Communications as a Service) solutions and the integration of communications into cloud infrastructures (IaaS/PaaS).
DevOps and Automation Network Engineer
The DevOps network engineer works at the intersection of traditional infrastructure and modern automation practices. They design, deploy, and manage large-scale network architectures using the principles ofInfrastructure as Code, continuous integration (CI/CD), and APIs. Their goal is to make networks more agile, reproducible, and scalable, while reducing human error and accelerating deployment cycles.
Main areas of focus:
- Infrastructure as Code (IaC)
- Defining and automating network configurations using tools such as Ansible, Terraform, Cisco NSO, or Nornir.
- Template management, version control (Git), and consistent large-scale equipment deployments (LAN/WAN, firewalls, SD-WAN, etc.).
- Automation of deployment workflows (CI/CD) using Jenkins, GitLab CI, ArgoCD, etc.
- Network Operations Automation
- Advanced scripting with Python, Bash, or PowerShell to generate, apply, audit, or back up network configurations.
- Use of REST APIs provided by vendors (Cisco, Fortinet, Juniper, Palo Alto, Meraki, etc.) to integrate the network into DevOps pipelines.
- Deployment of automated pipelines for security rule changes, VLAN management, or monitoring.
- Automated Monitoring and Observability
- Integration of network telemetry (NetConf, gRPC, SNMPv3, NetFlow) into real-time monitoring tools (Prometheus, Grafana, Zabbix).
- Automatic detection of network anomalies, integrated with SIEMs or incident management tools.
- Implementation of self-remediation playbooks, integrated with orchestration tools and rule engines (StackStorm, Ansible AWX, etc.).
- Testing, Validation, and Network Simulations
- Deployment of automated test environments (virtual testbeds, GNS3, EVE-NG, Cisco VIRL) to simulate changes prior to deployment.
- Use of frameworks such as Pytest, Batfish, or Robot Framework to test configuration compliance and network security.
- Continuous monitoring of routing rules, ACLs, NAT, BGP, etc.
Technologies and tools mastered/used:
To carry out their duties, the DevOps/Automation Network Engineer relies on a set of tools covering Infrastructure as Code, orchestration, monitoring, and network testing:
- Automation and IaC tools: Ansible, Terraform, SaltStack, etc.
- Version Control and CI/CD Systems: Git, GitLab CI/CD, Jenkins, ArgoCD
- Scripting languages: Python, Bash, PowerShell
- APIs & Programmatic Integrations: REST APIs for network devices (Cisco, Fortinet, Palo Alto, etc.), Postman, Curl
- Orchestration Tools & Execution Engines: Ansible AWX, StackStorm, Rundeck
- Monitoring & Observability: Prometheus, Grafana, Zabbix, Telegraf, ELK Stack
- Telemetry & Network Data Collection: SNMPv3, NetFlow, IPFIX, gRPC, NetConf/YANG
- Testing and simulation tools: GNS3, EVE-NG, Cisco VIRL, Batfish, Pytest, Robot Framework
Strategic Role:
The DevOps Network Engineer is a key player in the digital transformation of IT infrastructures. They foster collaboration between network, cloud, and development teams by bringing agile methodologies to traditionally rigid environments. They accelerate the migration to the cloud, optimize multi-environment management (on-premises, cloud, and edge), and play an essential role in the standardization and automated security of infrastructure.
In a world where networks are becoming software, this engineer embodies the new generation of professionals capable of ensuring the scalability, reliability, and speed of digital services.
The Expanded Role in an International Context
In a globalized economic environment, companies operate across multiple continents, with constant needs for connectivity, application performance, and network resilience. Network engineers are thus at the heart of this complexity, tasked with designing, securing, and optimizing infrastructures capable of meeting global digital challenges. Among their key responsibilities, four areas are particularly critical: DNS management, CDN utilization, defense against DDoS attacks, and multi-site connectivity.
DNS Management
The DNS (Domain Name System) is a fundamental component of network infrastructure. In an international context, managing the DNS is critical to ensuring the availability and speed of domain name resolution, as well as resilience against failures or attacks.
A network engineer must:
- Deploy a redundant DNS architecture with geographically distributed secondary servers.
- Manage public and private DNS zones (split-horizon DNS) to distinguish between internal and external lookups.
- Use high-availability and anycast DNS services to ensure that requests are always routed to the nearest location.
- Implement DNS security mechanisms such as DNSSEC to prevent cache poisoning and spoofing attacks.
- Monitor the performance and response times of resolvers, which are essential to the user experience worldwide.
Using a CDN
Content Delivery Networks (CDNs) are essential for accelerating the delivery of content (web, media, SaaS applications) to users located in different regions around the world.
The network engineer is involved in:
- Integrating the CDN into the existing infrastructure, often through a specific DNS configuration (CNAME, geo-aware redirection).
- Cache optimization to ensure that static content is served locally, thereby reducing latency.
- Monitoring the geographic distribution of users in order to adjust content delivery strategies.
- Monitoring CDN performance, managing access logs, and enforcing security policies (edge WAF, TLS certificates).
- Implementing multi-vendor CDNs to enhance resilience (failover between Akamai, Cloudflare, Fastly, etc.).
Protection Against DDoS Attacks
Distributed denial-of-service (DDoS) attacks pose a major threat, especially to businesses with a high public profile (e-commerce, SaaS, media). On a global scale, these attacks can be massive, and their impact on critical services can be devastating.
The role of a network engineer includes:
- The implementation of perimeter protection through DDoS mitigation providers (Cloudflare, Arbor, AWS Shield, etc.).
- The use of geographically distributed scrubbing centers capable of absorbing and filtering large volumes of malicious traffic.
- The implementation of dynamic ACL rules, rate limiting, and geolocation-based filtering on network devices.
- Real-time anomaly detection using sensors (NetFlow/sFlow, IPS) integrated with SIEM platforms.
- The ability to coordinate automated response playbooks in the event of an attack, in collaboration with SOC teams and network service providers.
Multi-site connectivity
A company’s global expansion requires seamless, secure, and optimized connectivity between sites. The network engineer is responsible for designing an architecture capable of addressing resilience, performance, and cost challenges by incorporating modern technologies.
His responsibilities include:
- The deployment of secure tunnels (IPSec, DMVPN) between the company’s various entities.
- The use of SD-WAN to prioritize application traffic, improve the management of Internet and MPLS links, and automate dynamic routing.
- The implementation of MPLS or Ethernet VPN for mission-critical sites that require strict SLAs.
- Geographic load balancing, high availability, and latency management via BGP, GSLB, and Anycast.
- Native integration with the public cloud from each site (Cloud on-ramp), while ensuring secure and high-performance access to hosted services.
What skills and technologies must a network engineer master?
Knowledge of network infrastructure
The network engineer is responsible for installing, configuring, and maintaining physical and virtual equipment, whether on-premises or in the cloud.
- Facilities:
- Switches (Cisco, Aruba, Juniper)
- Firewalls (Fortinet, Stormshield, Sophos)
- Routers (Cisco, MikroTik, Huawei)
- Wi-Fi Controllers and Access Points (Cisco, Aruba, Ubiquiti)
- Types of networks:
- LAN (Local Area Network)
- WAN (Wide Area Network)
- WLAN (Enterprise Wireless Networks)
- MAN, VPN, SD-WAN, etc.
- Monitoring and Management Tools:
- Nagios, Zabbix, PRTG, SolarWinds, LibreNMS
- Proactive monitoring, network mapping, alerting
- Integration with ticketing solutions (GLPI, ServiceNow, etc.)
Proficiency in Network Protocols
An understanding of network protocols is essential for diagnosing, optimizing, and securing communications between systems.
- Core Protocols:
- TCP/IP, DNS, DHCP, ICMP, NTP, HTTP/HTTPS
- Dynamic routing:
- OSPF, BGP, EIGRP
- Convergence, redistribution, interdomain routing
- Network Analysis:
- Wireshark, tcpdump, NetFlow, sFlow, IPFIX
Security and Cybersecurity
In an environment of constant threats, network engineers work closely with cybersecurity teams to build hardened architectures.
- Firewalls and security appliances:
- Cisco ASA, Fortinet, Palo Alto, Check Point
- Policy Configuration, NAT, Application Filtering
- Segmentation and filtering:
- ACL (Access Control Lists), VLAN, DMZ Zones, Port Security
- Microsegmentation and Zero Trust (ZTNA)
- Compliance and Standards:
- ISO 27001, GDPR, NIS 2, CIS Benchmarks
- Participation in security audits, drafting of procedures
- Intrusion Detection:
- IDS/IPS (Snort, Suricata)
- Integration with SIEMs (Splunk, ELK, etc.)
Automation, Scripting, and Infrastructure as Code (IaC)
To meet the demands for agility and scalability, network engineers are increasingly turning to automated deployments and as-code infrastructure management.
- Scripting languages:
- Python, Bash, PowerShell
- Network task automation, log parsing, REST API
- Automation Tools and IaC:
- Ansible, Terraform, Cisco NSO, SaltStack
- Configuration templates, network topology deployment
- DevOps Integration:
- Git (version control), Jenkins (CI/CD), GitLab, automated pipelines
- Using RESTful APIs to control network equipment or SDN controllers.
How do you become a network engineer?
Training
- Bachelor’s or Master’s degree in computer science, telecommunications, or computer systems and networks (engineering or computer science schools, universities, etc.).
- Work-study programs, internships, or initial work experience as a network technician.
Useful Certifications
These certifications attest to an internationally recognized level of proficiency:
- Cisco (CCNA, CCNP, CCIE),
- Juniper (JNCIA, JNCIS),
- Fortinet (NSE 4 to 7),
- CompTIA Network+, Security+,
- AWS Advanced Networking – Specialty,
- CISSP (for security-focused roles).
What is the salary of a network engineer?
Salaries vary depending on experience, location, skills, and the type of company you work for.
What are the career paths for a network engineer?
With experience, a network engineer can advance to positions with broader responsibilities:
Network Architect
Role: Designs complex network architectures to meet the needs of multi-site organizations, often on a global scale. Ensures the resilience, performance, security, and scalability of the infrastructure.
Key Skills:
- Proficiency in advanced network protocols (BGP, OSPF, MPLS, VXLAN, etc.).
- Knowledge of cloud (Azure, AWS, GCP) and hybrid environments.
- Integration of Software-Defined Networking (SDN).
Security Manager / SOC Manager
Role: Oversees the company’s operational cybersecurity and leads the incident detection and response teams. Coordinates the Security Operations Center (SOC) and ensures continuous monitoring of information systems. Ensures compliance with regulations, anticipates threats, and builds a robust security posture.
Key Skills:
- Proficiency in security monitoring and analysis tools (SIEM, EDR/XDR, SOAR).
- Knowledge of security standards and frameworks (ISO 27001, NIS2, GDPR, MITRE ATTCCK).
- Implementation of Zero Trust strategies, network segmentation, and IAM/PAM.
- Ability to coordinate incident response (CSIRT/CERT) and produce clear reports for management.
- Cloud security skills (CSPM, CIEM, securing Azure, AWS, and GCP environments).
- Leadership and management of multidisciplinary teams in critical situations.
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IT Project Manager
Role: The IT project manager leads technical projects related to network infrastructure, including the deployment of new architectures, migration to the cloud, WAN/LAN redesign, and securing network connections. Coordinates between technical teams, vendors, and internal stakeholders to deliver projects on time, within budget, and in accordance with technical requirements.
Key Skills:
- In-depth knowledge of network technologies (routing, switching, firewalls, VPN, SD-WAN, Wi-Fi).
- Proficiency in project management (V-model, Agile/Scrum, PRINCE2, or PMP).
- Ability to translate business needs into viable technical solutions.
- Be able to manage risks, schedules, and communication with a variety of stakeholders (CIOs, architects, CISOs, service providers)
- Skills in service quality management, technical documentation, and budget monitoring.
- Understanding of issues related to hybrid cloud, network security, and automation (IaC, Ansible, NetOps).
Freelance Consultant / Trainer
Role: Provides specialized expertise in network engineering and architecture to companies and training organizations. Works on consulting, auditing, infrastructure design, and technical team capacity-building projects. Actively monitors technological developments and adapts content and recommendations to market trends.
Key Skills:
- Advanced proficiency in network technologies (BGP, OSPF, MPLS, VXLAN, SD-WAN, Wi-Fi, firewalling).
- Experience in complex network architecture, hybrid cloud, and perimeter security.
- Ability to conduct audits, impact assessments, and develop strategic recommendations.
- Teaching skills: facilitating training sessions, developing instructional materials, and providing individualized support.
- Excellent communication skills, a commitment to customer service, and the ability to work independently in managing projects and contracts.
- Valued technical certifications (CCNP/CCIE, JNCIP, NSE, AWS/Azure Network Specialist).
CTO / Chief Technology Officer
Role: Defines the company’s technology strategy in relation to infrastructure, network, security, and overall IT performance issues. Makes technical decisions, oversees the engineering, architecture, and operations teams, and ensures that network solutions align with business objectives. Drives technological innovation and digital transformation through a structured and secure vision of the IT infrastructure.
Key Skills:
- Extensive expertise in large-scale network architecture (WAN/LAN, SD-WAN, cloud networking, traffic security).
- Cross-functional knowledge of related fields: cybersecurity, hybrid cloud, automation (IaC, NetDevOps).
- Ability to lead infrastructure transformation projects (mergers, cloud migration, WAN/LAN overhauls).
- Strategic vision, budget management, IT governance, and relationships with technology partners.
- Proven leadership, with the ability to bring technical teams together and communicate effectively with senior management.
- Expertise in scalability, resilience, compliance, and security in an international context.
The IT fields where network engineering skills are currently in highest demand are: hybrid cloud, cybersecurity, infrastructure automation (NetDevOps), software-defined networks (SDN/SD-WAN), and Zero Trust environments.
Sectors and Companies Hiring Network Engineers in Switzerland
Network engineers are in high demand across a variety of industries:
- Banks, insurance companies: high availability and cybersecurity (UBS, Swiss Life…),
- Healthcare, hospitals: patient data protection (CHUV, HUG…),
- Manufacturing, energy, pharmaceuticals: critical infrastructure management (ABB, Nestlé, Roche…),
- Telecommunications, cloud: operators and hosting providers (Swisscom, Infomaniak…),
- International organizations and NGOs: multi-site management (UN, WHO…),
- IT services firms and IT consulting firms: a variety of projects for major clients.
The most dynamic regions: Geneva, Vaud, Lausanne, Zurich, Neuchâtel, Fribourg.
Boost Your Career as a Network Engineer with Qim info
At Qim info, we help you showcase your expertise in projects with a significant technical impact. We believe in providing high-quality support in a collaborative and stimulating environment.
Why Join Us?
A variety of technical assignments in demanding environments,
- Individualized career guidance focused on professional growth,
- Funded continuing education and certification programs,
- A friendly corporate culture, with regular events.
Are you passionate about network technologies, curious, and ready to take on challenges? Check out our job openings and apply now!
