HELP! Male Geriatric Case Manager Needed complex family situation ~ Jacksonville, Florida area

Re: Elderly parent plus two senior adult special needs siblings (I/DD). Live at home being cared for by another sibling with mental health issues; who is 100% dependent financially. Caregiving sibling is co-POA & co-trustee with two other siblings who live out of state. Caregiver is becoming territorial, angry and increasingly paranoid. (I am a caregiver myself in the trenches ten years, so please no judgments about picking on the caregiver. Person has a mental illness, was stable, now deteriorating.)

Parent not officially deemed incapacitated, but is. Doctor willing to write letter to this affect, but caregiver will fight this and create trauma; thus need for Care Manager Facilitator.

Seeking personal recommendation for a seasoned and very skilled case/care manager to help navigate the legal, financial and health decisions for these folks. Person needs to be male and preferable caucasian to have any chance of buy in, as caregiver is extremely prejudiced and misogynistic (incredibly sad I know, but that's where we are).

YES, APS/911 will be called if needed. However, as anyone knows who has called APS, bad situations can get exponentially worse with that route. Looking for way to avoid trauma & drama of a worse case scenario. Family has resources so that is not a problem. Thank you.