Most EMT's will find employment as there is always a need for first responders. Also there is normally a fee when their services are needed. An ambulance is not covered under free healthcare.
"Plethora" is a singular noun, so you say "is a plethora."
Plethora is singular and the plural form is plethoras
EMTs typically work with a partner. Depending on if you are on a paid squad or a volunteer will depend on who your partner is.
(Plethora means an abundant excess as a bountiful excesss such as riches.)"The Thanksgiving feast was a plethora of favorite foods of the family.""There was a plethora of costumes to choose from for the masquerade.""From the plethora of possible names for the project, he chose the most apt."
Medical communities, support groups, therapy / therapists communities, and local / related family and friends.
"Is", since plethora is in singular form
There was a plethora of food on the table at Thanksgiving.
Plethora is a noun.
The noun plethora (a plethora) uses singular verb forms.The word plethora is an uncountable (mass) noun, a type of aggregate noun that refers to an unspecified but large number of elements, e.g. a plethora of choices.
EMTs are involved in the field of emergency medicine. EMTs provide immediate pre-hospital emergency care, first aid, and transport to the sick, pregnant, and injured. What they can and cannot do varies depending on state and local protocol and the amount of training that the EMTs have.
EMTs
Plethora is singular and the plural form is plethoras.