Our client is seeking a contract resource to
support modernization of site-to-site IPsec VPN tunnels and firewall access
control policy hardening within the client's environment. This role
will focus on upgrading existing VPN tunnels from IKEv1 to IKEv2 and ensuring cryptographic configurations meet organizational standards. The contractor will also review and refine firewall rules on Cisco Firepower
systems to reduce overly permissive access and align configurations with approved requirements. This work supports improved security and controlled network connectivity across the client and its external
partners.
Responsibilities
Review approximately 80 existing site-to-site IPsec VPN tunnels
Upgrade approximately 50 VPN tunnels from IKEv1 to IKEv2
Ensure VPN configurations align with organizational cryptographic standards
Update pre-shared keys (PSKs) to meet a minimum 20-character requirement
Validate VPN tunnel functionality after each change
Review approximately 10 firewall access control rules on Cisco Firepower
Modify firewall rules to remove overly permissive or broad subnet access
Restrict firewall rules to required source/destination networks, ports, and protocols
Apply principle of least privilege in firewall rule updates
Perform validation testing after firewall changes to confirm no service disruption
Coordinate implementation activities with UC Davis campus teams and external partners
Support execution of approved maintenance window changes
Provide technical assistance during implementation activities
Document VPN and firewall changes and validation results
Coordinate cryptographic parameter and shared secret updates with external partners
Support scheduling and execution of maintenance window activities
Required Technical Experience?
Experience managing site-to-site IPsec VPNs
Hands-on experience upgrading VPNs from IKEv1 to IKEv2
Experience configuring and validating VPN tunnel connectivity
Knowledge of cryptographic standards and secure key management practices
Experience managing firewall access control rules
Experience with Cisco Firepower firewall platforms
Ability to implement least privilege network access controls
Experience performing post-change validation and troubleshooting network issues
Experience coordinating technical changes with internal teams and external partners
Experience working within structured maintenance window processes
Preferred Qualifications
Experience in healthcare or higher education IT environments
Familiarity with large-scale enterprise network environments
Experience supporting change management processes in production environments
Desired Certifications
Cisco CCNA Security or CCNP Security (or equivalent experience)
CompTIA Security+ or equivalent security certification
ITIL Foundation (preferred)
Required Skills :
Basic Qualification :
Additional Skills :
Background Check : No
Drug Screen : No
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