Helmet Mounted RF Communication Module Design

We are in the process of making a Helmet mounted RF based
communication module. Currently PCB design is in progress.
we need a rugged product for which we are looking for a
product designer

Current status:
What we have :
1. RF module, list of components are mentioned below
i. K-type female jacks
ii. C- type charging port
iii. Buttons on PCB (all buttons will not be used)
1. Power
2. Vox to PTT
3. PTT
4. Volume increase decrease - 2 buttons
5. Channel increase decrease - 2 buttons
iv. Antenna connector
v. Batter connector
vi. Lights - 2 Led

Requirement:
End to end solution with regards to design.
This will be design centric project with, where PCB will be designed first basis the
product design. The product designer team will suggest the placement of
components(buttons, battery connectors etc.) basis which we will make the PCB.
suggestions for battery connector and placement are welcomed

Brief :
1. Design principle :-
a. Water/rain/splash proof
b. Fire resistant
c. Stress proof and wear resistant
d. Mountable Clip for helmet integration
2. List of sample design are referred by bluetooth intercom helmet integrated head
set
3. Buttons should be glove friendly(prominent in size)
4. Existing battery setup for walki talki can be referred,
5. Battery removable and chargeable
6. No screen required
7. Reference design: (all the design are water resistant )

a. Link 1 :- https://gearnride.in/product/shop/accessories/intercom/bluetooth-intercom/sena-bluetooth-intercom-sf4-single/
b. Link 2 :- https://gearnride.in/product/shop/accessories/intercom/bluetooth-intercom/bsddp-motorcycle-helmet-bluetooth-intercom-v6-pro-waterproof/

1. helmet mounted device with components : -
a. K-type jack
b. Clip
c. Mic and Speaker
d. C type - Charging
e. Buttons(limited buttons) :
i. Volume
ii. Power
iii. PTT - vox