With the help of those connections, he held a number of public commissions and offices, including those of Esquire of the Body (c.1605–c.1608), Gentleman of the Privy Chamber (by 1615) and Lieutenant-General of the Ordnance from 1608 to 1616.
As Lieutenant of Ordnance, Dalison organised the firework displays on the Thames beside Whitehall Palace at the investiture of Prince Henry, London's Love to Prince Henry in May 1610,[2] and at the wedding of Princess Elizabeth and Frederick V of the Palatinate in February 1613.
After his death, an irregularity was discovered in the register of baronets, which meant that the surviving son, Thomas, could not automatically inherit the baronetcy.
On 27 October 1624 the baronetcy was therefore recreated for him but became extinct when the unmarried Sir Thomas was killed at the Battle of Naseby in 1645.
He left one surviving son, Thomas, who was killed at the battle of Naseby, and a daughter by his third wife.