[1] In 1763 he was appointed Lord-Lieutenant of Suffolk,[2] a post he held until 1769.
In 1766 he was created Baron Maynard, of Much Easton in the County of Essex, and Viscount Maynard, of Easton Lodge in the County of Essex, with remainder to his kinsman, Sir Charles Maynard, 5th Baronet, of Walthamstow.
[1] Lord Maynard died unmarried in June 1775.
On his death the baronetcy of Eaton Parva and baronies of Maynard created in 1620 and 1628 became extinct.
He was succeeded in the barony of 1766 and viscountcy according to the special remainder by his kinsman, Sir Charles Maynard, 5th Baronet.