Sr. Network Security Engineer

Varian is seeking an experienced Sr. Network Security Engineer that will be responsible for the design, implementation, and management of an organization's network security infrastructure. This role requires advanced technical skills, a deep understanding of security protocols, and the ability to lead security initiatives to protect the organization's assets from cyber threats.

You are responsible for:

Leading the design, deployment, and optimization of secure, scalable network infrastructures with a focus on Cisco Software-Defined Access (SDA) and other SDN-based technologies.

Collaborating cross-functionally to manage and fine-tune policy-based automation and network segmentation, ensuring alignment with security and performance objectives.

Providing strategic guidance on network transformation initiatives, including SDA adoption, infrastructure automation, and security architecture enhancements.

Analyzing network traffic and performance metrics to identify trends, proactively resolve issues, and enhance overall system reliability and availability.

Ensuring network implementations and configurations adhere to architectural standards, security policies, and regulatory compliance frameworks.

Acting as an escalation point for critical network issues, applying deep troubleshooting expertise to drive swift resolution of incidents.

Delivering expert-level support for Priority 1 and major service outages, functioning as a subject matter expert in network operations and incident response.

Generating and present regular reports on network health, project progress, and operational metrics to senior leadership.

Mentoring and supporting the development of junior network engineers and administrators, fostering a culture of technical excellence and continuous learning.

Staying current with emerging technologies and trends in networking—particularly SD-WAN, SDA, SDN, and automation—and evaluate their applicability to enterprise environments.

Minimum Qualifications:

BS in Computer Science and or the following: Information Technology, Cybersecurity, Network Engineering, Information Systems and or Electrical Engineering. MS Preferred.

Minimum of 5+ years in network engineering and solution designing, with a focus on enterprise-level networking solutions. 

Strong hands-on experience with Cisco SDA technology, including Cisco DNA Center, Cisco Identity Services Engine (ISE), Cisco Catalyst switches, and Cisco Wireless LAN controllers. 

Deep knowledge of Software-Defined Networking (SDN), network automation, and network security. 

Proficient in network protocols, including BGP, OSPF, LISP, MPLS, VXLAN, and EVPN. 

Experience with network segmentation, micro-segmentation, and policy-driven networks. 

Expertise in network security technologies, including firewalls, VPNs, IDS/IPS, SIEM (Security Information and Event Management) systems, and encryption protocols.

Strong knowledge of network protocols, architecture, and security best practices.

Proficiency in scripting languages (e.g., Python, Bash) and automation tools.

Relevant certifications such as CISSP (Certified Information Systems Security Professional), CISM (Certified Information Security Manager), CCSP (Certified Cloud Security Professional), CEH (Certified Ethical Hacker), or equivalent.

Vendor Expert certification such as, Palo Alto Network, CheckPoint, Cloud-based Firewalls.

Working Knowledge of Enterprise applications, Datacenter fabric and Service Provider backbone

Working knowledge of authentication systems such as OKTA, SAML, LDAP, and MS Active Directory

Industry certifications such as Zscaler, CCNP, JNCIP, PCNSA, CISSP, or CCSP, ITSM, ITIL

Familiarity with cloud-based networking (e.g., AWS, Azure) and hybrid networking solutions and automation tools like Ansible, Python, or Salt Stack for network management and orchestration. 

Profile and skills: 

Your ability to lead discussions on relevant business topics in English is the basis for efficient and eye-level communication with colleagues and partners worldwide 

You have excellent problem-solving, troubleshooting, and analytical skills. 

You have strong communication and presentation skills, with the ability to convey technical concepts to both technical and non-technical stakeholders on management level. 

Ability to work collaboratively in cross-functional teams and manage multiple projects simultaneously. 

You are able to identify risks, document them and communicate along developed mitigation measures