Hi John,

You can dig up plants, including the tap roots, for removal. Given the reproductive capacity of this plant, remove it as soon as possible to avoid perpetuating the infestation. Wear gloves, long sleeves, pants, socks and shoes to protect your skin from the sap. Compost or dispose plants with yard waste.
Do not burn plants to prevent any accidental inhalation. Mowing or weed whacking will not kill the plant but can reduce seed production in second year plants.
For more information on poison hemlock id and control click on the link below.

Poison hemlock identification and control - Agriculture (msu.edu)

Thank you for using Ask Extension.
Pam
MSUE Master Gardener

Thank you Pam.

Do you know of any companies that will do this for hire?

John

We (MSUE) cannot recommend any companies.  I'd suggest contacting a few lawn services to see if they can remove it, make sure they know it's poison hemlock.

Pam