As you said CCNP is well known for employers therefore most employer request it. CCSP is harder than CCNP and if you want to understand it fully you need to understand CCNP first it is not necessary to do CCNP exam just understand its topics. In order to secure a network you need to understand how switches routers and WAN technologies work and all these topics are covered in CCNP. Recently employers started to recognise CCSP and some of them start to request it. So if you think you understand CCNP topics or you can read it before you start CCSP you can go for CCSP and if you are interested in it you will do well in it.
The other option is to do CCNP and then do one or more of the specialized certificate in security such as:
Cisco Advanced Security Field Specialist
Cisco Firewall Specialist
Cisco IPS Specialist
Cisco Information Security Specialist
Cisco Security Sales Specialist
Cisco Security Solutions and Design Specialist
Cisco VPN Specialist
I hope this helps
المفضلات