Sr. Network Engineer L4
Zensar Technologies
Santa clara, CA
Santa Clara ,California
Onsite – 5 days a week
No Remote, NO HYBRID
Rate : DOE
Onsite from Day 1
Office location- Santa Clara, CA 95054, United States
- Design, deploy, configure, and maintain Cisco ISE for network access control (NAC) and identity-based policy enforcement.
- Implement 802.1X authentication, MAB (MAC Authentication Bypass), and posture assessment for wired and wireless networks.
- Manage device profiling, guest access portals, BYOD policies, and certificate-based authentication (EAP-TLS/PEAP).
- Integrate ISE with Active Directory, PKI, and other authentication systems.
- Develop and maintain ISE policies, network device groups, and authorization profiles.
- Monitor ISE logs and troubleshoot authentication and authorization issues.
- Perform ISE patching, backup, and system upgrades as part of lifecycle management.
Firewall Responsibilities:
- Configure, manage, and troubleshoot Cisco ASA, Firepower (FTD), Palo Alto, or Fortinet firewalls.
- Create and maintain access control policies (ACLs), NAT, VPNs, and security zones.
- Monitor and analyze firewall logs to detect anomalies or potential security breaches.
- Collaborate with security teams to enforce Zero Trust and micro-segmentation strategies.
- Conduct firewall performance tuning and ensure compliance with security standards.
Good to have
General Network Security:
- Collaborate with network operations and security teams to ensure consistent policy enforcement across wired, wireless, and VPN environments.
- Participate in incident response, root cause analysis, and remediation for security events.
- Develop and maintain network documentation, diagrams, and standard operating procedures (SOPs).
Required Skills & Qualifications:
- Bachelor’s degree in Computer Science, Information Technology, or related field.
- 5+ years of experience in network security engineering.
- Hands-on experience with Cisco ISE (2.x or 3.x) deployment and management.
- Strong understanding of RADIUS, TACACS+, EAP, 802.1X, VLANs, and network access control.
- Experience with Cisco ASA, Firepower, or next-generation firewalls (NGFW).
- Proficiency with Cisco Catalyst switches, wireless controllers, and VPN technologies.
- Familiar with network monitoring tools (SolarWinds, Splunk, Wireshark, etc.).
- Cisco certifications such as CCNP Security, CCIE Security, or Cisco ISE Specialist are highly desirable.
Preferred Qualifications:
- Experience with multi-vendor firewall platforms (Palo Alto, Fortinet, Check Point).
- Understanding of Zero Trust Network Access (ZTNA) and SASE architectures.
- Familiarity with automation and scripting (Python, Ansible) for network configurations.
About the Company
Zensar Technologies
Zensar Technologies is a technology partner of choice for global organizations looking to strategically transform, grow, and lead in today’s challenging business environment. Backed by a strong track-record of innovation, over 8000 associates and footprint in 29 global locations, Zensar’s comprehensive range of software services and solutions enable its 400+ forward-looking customers to cross new thresholds of business performance. The Company owing to its growth in recent times has moved up the NASSCOM listing of Software Service Companies in India to #13 this year. This is reiterated in the Porter’s Prize for Best Strategic Management in the Information, Media and Telecom Industries that has been bestowed upon the Company. A noted publication, Dataquest in its Top 200 listing has rated Zensar 20 notches higher this year, given its performance. Zensar operates in the US, Europe, Africa, Middle East, Singapore and Australia regions and has delivery centers in India (Pune, Hyderabad and Bangalore), China,UK, Amsterdam and US (Westborough). Zensar is the world's first enterprise-wide SEI CMM Level 5 Company. The Company has a services portfolio that ranges from the traditional to the transformational - across service lines of Management Consulting, Business Application Services, Enterprise Solutions, Enterprise Collaboration Services, Testing and Assurance Services, BPM and Infrastructure Management Services. Zensar’s experience across industries of Retail, Manufacturing, Insurance, Banking, Healthcare and others translate into a differentiated value proposition and faster time-to-market for clients. Our capability in infrastructure-oriented services ranges from remote infrastructure management to end user computing to data centre services and security and compliance. Zensar is now leading the way in powering next-generation enterprises with its cloud, mobility and social media solutions. The Company has been recognized for its exceptional service capabilities and industry-leading solutions, and has bagged prestigious awards in areas such as R&D, people practices, CSR programs and sustainability initiatives. Zensar's Corporate Social Responsibility programs focus on creating sustainable development and livelihood for local communities. At Zensar, we see Innovation as a clear differentiator. Innovation, along with focus on deep, long-lasting client relationships and strong domain expertise, drives every facet of our day-to-day operation. For our clients, it translates into strategic business value and for us, into consistent financial performance – Zensar clocked 25.3 percent average revenue growth over the last five years. We believe in leveraging the power of innovation to seize new opportunities. So, employees are encouraged to challenge opinions and ideas, and to push the boundaries of what is possible. Different perspectives that arise out of Zensar’s world culture - entailing diversity of gender, region, nationality, background, or education - blend to transform every vision into reality. Our Global Delivery Model, defined by robust service capabilities and the ability to source best talent from across the world, is backed by 24X7X365 support. The result: Superior value for clients.