As a part of the network engineer, you as a certified network security engineer has the following set of responsibilities for a business set-up:
The engineer should implement different solutions and improve the stability and flexibility of the network with the best security features.
As an experienced security expert perform the installation, configuration, and operation of Palo-Alto firewall products & services
To monitor performance and fix the network issues by scheduling preferred solutions
To make use of multiple devices used by business to increase the efficiency and performance of the network along with its security
More info @ pcnse job skills