Jopling was an MP for over 30 years, serving for the constituency of Westmorland from 1964-83 and then Westmorland & Lonsdale from 1983-97.
Alongside this he worked at the HM Treasury in the early 1970s, firstly as assistant whip and then as Lord commissioner. After this, Jopling worked as shadow minister for agriculture, fisheries and food before becoming a minister of state. 
- All Party Parliamentary Group on Unconventional Oil and Gas, member
- Tackling Terrorism All-Party Parliamentary Group, member
- Lord Jopling www.parliament.uk, accessed 24 April 2015