Senior Network Engineer​/Architect : TS​/SCI Security Clearance

• Tampa, FL
• Government/Military

Tulzi Technologies, LLC (Tulzi) prides ourselves on an open, and honest culture in the workplace which builds a morale conducive to inspiring growth on our team, while balancing lifestyle by supporting personal and family goals with flexibility. Tulzi offers secure network systems and software engineering solutions in both public and private sectors. With certified expert consulting the team at Tulzi is able to address the customers mission, and follow through in the systems development life cycle.

We are seeking a Senior Network Engineer to support a secure, standalone enterprise environment. This role is responsible for designing, maintaining, and securing network infrastructure supporting virtualized systems, application platforms, and compliance-driven operations.

• Design, implement, and maintain Layer 2/Layer 3 network infrastructure
• Configure and support Cisco Catalyst (9300/9500 series) and Cisco NX-OS–based switching platforms
• Manage VLANs, trunking, segmentation, ACLs, firewall rules, and traffic segmentation
• Maintain network topology, routing logic, and traffic flow design
• Support evaluation and future deployment ofdata center–optimized switching platforms for modernization initiatives
• Deploy and support 802.1X authentication using Cisco ISE and LDAP Integration
• Implement machine authentication with user fallback, dynamic VLAN assignment, and fail-open design
• Manage TACACS+ for network device administration
• Support networking for VMware ESXi / vCenter environments, including vSwitch and distributed switch configuration
• Provision and maintain VM networking
• Troubleshoot multi-tier service flows across infrastructure layers
• Implement and maintain STIG-compliant network configurations
• Enforce port security, DHCP snooping, Dynamic ARP Inspection, and secure management access
• Support RMF security controls and FIPS-compliance
• Integrate network devices with SIEM (Elastic), Zabbix, or equivalent monitoring tools
• Troubleshoot network connectivity, authentication failures, and application reachability issues
• Perform structured troubleshooting using logs, packet capture, and service validation
• Support change control (CAB) processes
• Execute network upgrades (e.g., Cisco IOS-XE / NX-OS) with validation and rollback planning
• Maintain documentation including VLAN mappings, IP plans, and network diagrams
• Support network components of backup and disaster recovery operations
• Validate connectivity for backup systems and storage platforms
• Assist in failover and restoration procedures
• Work with systems engineers, security teams, and application owners
• Provide network impact analysis for system architecture decisions

• An active TS/SCI security clearance.
• Current DoD 8570 certification at IAT level II, (i.e. Security+ CE).
• 3+ years of experience in network administration/engineering in a Cisco environment.
• Experience with Cisco switches and routers
• A solid foundation in networking including routing, switching, and security.
• Ability to work in a high-tempo operational environment where priorities change frequently.
• Must be able to interface with individuals at all levels of the organization both verbally and in writing.
• Must be well-organized with the ability to coordinate and prioritize multiple tasks simultaneously.

• Experience with hybrid connectivity between on-prem and AWS
• Familiarity with AWS VPC design, Site-to-Site VPN, Client VPN, and Direct Connect
• Understanding of extending secure or restricted environments into cloud architectures
• Knowledge of BGP routing concepts,…