Williams was Sir Richard's cousin, Sir John's god-son, and, later, his neice married Sir Richard's brother Owen ; brother William Wynn was in the Lord Keeper's service.
Sir Richard was granted a reversion to the office of Treasurer and Receiver General of the Queen's Household in 1626. He succeeded to this office in 1629, and retained it until his death in 1649. In 1629 he was appointed Groom of the Bedchamber to the King and Queen. His place of intimacy with Charles I was confirmed by a Royal declaration (1634) establishing precedence : Sir Richard Wynn, Sir Robert Eaton (Aytoun), Sir John Finch and Sir Thomas Hatton
"should have ranke and precedence next after fower other eminent officers of his Majestie,”
namely the Captain of the Guard, the Knight Marshall, the Treasurer of the Chamber and the Master of the Jewel House, with the exception that Sir Richard, being a baronet, shall "take place of" all other baronets.441
His career as an M.P. spanned 35 years. In 1614 he was elected for Carnarvonshire, but losing that in 1621, he was returned for
Ilchester in 1621, 1624, 1625.
"One of the royal nominees for the Short Parliament, he was returned for three places, Newton, Bodmin and Andover and chose to sit for the last. His election for Liverpool, in October 1640, was probably gained in a similar fashion."442
He was M.P for Liverpool until Pride's Purge in December 1648.
Sir Richard used his position at Court for the benefit of his family. In particular, his youngest brother Henry became Solicitor-General to Henrietta Maria in 1640, until 1646; and resumed the office in 1660, after the Restoration, until the Queen Mother's death in 1669.