Career
He was active in local administration and around the county of Cheshire. In the 1630s Gerard realised that his estate of Crewood was well located to take advantage of the salt trade. He was also served as a head constable.
At the outbreak of the Civil War Gerard joined the Parliamentary army.
He was governor of the garrison at Northwich, fought in the Battle of Tarvin in 1643, and he successful Parliamentary siege of Chester under the command of Sir William Brereton. Gerard, like several other minor gentry in the region, seems to have flourished under the patronage of Sir William,He proved not only to be a competent military officer, but also an administrator and was successful in raising Proposition money from the parishes of Bucklow, Edisbury and the Northwich hundreds.
After the First Civil War and through the Interregnum (England) Gerard was a Justice of the Peace (Justice of the Peace). lieutenant was as a Justice of the Peace that he helped in suppressing the Booth"s Rebellion in 1659.
At the restoration of the monarchy Gerard lost his position as Justice of the Peace. In 1665 he was arrested for treason, but no records survive of his involvement in a plot.
