Firewall expert wanted

Also part of the job is to consult us in a new solution how to setup best the new network for IPv4 and IPv6. Also part of the job is to share us how you want to document NAT and firewall rules and how to ensure that they will stay documented in the future. Since we get often application/proposals of "experts" with no real hands on experience in the requested topic, please provide us: - how big is your currently maintained network with opnSense (how many IPs, how many networks, how many VLANs) - how is your opnSense connected to the internal network (bandwidth, technology, redundancy)? - how many opnSense setups have you done in the last 2 years? - how you ensure ongoing documentation of firewalls (topology, nat and firewall rules) with multiple administrative persons? - what is the best practice for IPv4 and IPv6 setup? We are searching for someone to get started with our new opnSense in real environment. We have a lab setup with already good experience in it. Also we would like to have someone on the long run to take responsibility for the full firewall in the future.