Green was born on 12 August 1973 in Northern Ireland during The Troubles, while his father served with the British Army. He moved back to Liverpool where his father worked in catering and his mother was employed as a school dinner lady.^[6] He attended school in Liverpool before completing a Higher National Diploma qualification in physics.

Prior to being elected, Green worked as an engineer in the mass spectrometry industry for 20 years.^[7] Before beginning his career as an engineer, Green worked in a variety of low-paid temporary jobs, including as a vehicle mechanic, in a picture frame factory and at a bookies.^{[8][better source needed]}

Prior to winning Bolton West, Green had contested Manchester Withington at the 2010 general election, coming third with 11.1% of the vote.^[9]

At the 2015 general election, Green regained the Bolton West constituency for the Conservatives with a majority of 801 votes, the seat having been held by Labour since 1997. With the inclusion of the Borough of Wigan ward of Atherton within the constituency in 2010, he is the first Conservative MP to represent a seat in the Wigan area since 1974.

At the 2017 general election he increased his majority and vote share. In the 2019 general election, his majority grew to 8,855 votes, an increase of 7.4% on the 2017 general election.

In 2016, he introduced a Private Member's Bill, Representation of the People (Voter Proof of Identity), requiring those on the electoral register to produce proof of identity at polling stations before voting to combat electoral fraud.^[10] The policy was later included in the 2017 Conservative manifesto.^[11]

During the 2015–2017 Session of Parliament, Green was elected to serve on the Science and Technology Select Committee. In 2017, he was elected to serve on the Work and Pensions Select Committee.^[12] He formerly sat on the Home Affairs Select Committee prior to the 2019 general election and since March 2022, he has been a member of the Backbench Business Committee.

On 3 February 2016, Green held a Westminster Hall debate on Government investment in cycling. The preceding online digital debate, also held by Green, reached more than 2.1 million Twitter accounts—the highest number ever for a House of Commons digital debate.^[13]

During the 2016 EU Referendum, he supported Brexit, arguing as follows: “It is clear to me that the European Union will not reform and so I believe the United Kingdom should once again become an independent sovereign state.^[14]

In Parliament, he has campaigned on funding for refuge services^[15] and better transport links for his constituency. He has also been vocal in his opposition to building on greenfield land, campaigning against proposals to build on the Hulton Park Estate in his constituency.^[16]

Green has also been campaigning for the delivery of the proposed Westhoughton bypass, for which plans date back to the immediate post-war period.^[17] The bypass would ease traffic between Bolton and Wigan and reduce congestion in Daisy Hill, along with providing a more appropriate route for HGVs to reach the M61 from Atherleigh Way.

Green continues to push for the development of the Loco Works spine road as part of his plan to improve local transport infrastructure. He secured £12 million of funding from the then Secretary of State for Housing, Communities and Local Government, Sajid Javid, to deliver the road – which would provide the main access point for vehicles entering the 1,700 home Rivington Chase development and link the site with Middlebrook retail park, Horwich Parkway railway station and Junction 6 of the M61.^[18]

As a key focus of this transport plan, Green has campaigned for the long-awaited construction of Junction 7 of the M61 as a means of alleviating congestion within Horwich, raising the issue with the Department for Transport and in parliamentary debates.^[19]

Green also advocates a greater role for nuclear energy within the UK energy system, with a particular focus on the delivery of small modular reactors.^[20] He has continually made the case for affordable, reliable sources of energy to power the UK’s manufacturing sector.^[21]

Green takes a keen interest in the work of Greater Manchester Police and repeatedly raised concerns in Parliament about GMP’s £70 million bespoke Integrated Police Operating System, including with the Prime Minister in February 2020.^[22] Following interventions from Green, Her Majesty's Inspectorate of Constabulary were ordered to conduct an independent review of the system. In March 2022, the Chief Constable of GMP announced that a key element of IOPS would be replaced with existing technology used by other police forces.^[23]

In January 2018, he was appointed Parliamentary Private Secretary (PPS) to the Department for Transport,^[24] but resigned from this post on 9 July 2018 over the government's Brexit position.^[25] On 16 November 2018, Green confirmed that he had submitted a letter calling for a vote of no confidence in the Prime Minister Theresa May.^[26]

In August 2019, Green was appointed as a Parliamentary Private Secretary in the Department for Education following the election of Boris Johnson as Conservative Party leader and Prime Minister.^[2] His role was to assist education ministers in policymaking and to liaise between the department and backbenchers".^[2] Green became Parliamentary Private Secretary to Baroness Evans, Leader of the House of Lords and Lord Privy Seal after the 2019 general election.

He stepped down from this position on 13 October 2020 due to his disagreement with the government's approach to coronavirus restrictions.^[4]

He has since joined the All-Party Parliamentary Group for Pandemic Response and Recovery.^[27]

Green is actively involved in medical research and healthcare-related matters in Parliament. As Chairman of the influential All-Party Parliamentary Group on Healthcare Infrastructure, he has recently overseen a body of work on NHS infrastructure needs to which Andy Burnham and Stephen Dorrell – both former Secretaries of State for Health – contributed evidence.^[28] He is also Chairman of the APPG on Medical Research and Vice-Chair of the APPG for Life Sciences.

In the 2017-19 parliamentary session, Green introduced a Private Member’s Bill which sought to place the Forensic Science Regulator on a statutory footing, to enforce an industry code of practice for public and private forensics provision. The Bill received government support but fell when parliament was dissolved for the 2019 general election, due to constraints on the parliamentary timetable. Subsequent to this, Green worked with colleagues across the aisle to deliver this important legislation when an almost identical Bill, tabled by another Member of Parliament, came before the House of Commons.^[29]

In July 2022, Green was elected to the ruling executive of the 1922 Committee, which represents the views of Conservative backbench MPs to the Government. As part of the role, he chairs the 1922 backbench health committee. He also sits on the executive committee of the Northern Research Group – a caucus of MPs representing constituencies in the North of England who argue for increased government investment in the region.^[30]

Green is a keen runner, having taken part in the 2017, 2018, 2019 and 2021 London Marathons to raise funds for Bolton Hospice, Fortalice – a women's refuge in Bolton – Derian House Children's Hospice and Urban Outreach.^{[31][32][33][34]}

• Profile at Parliament of the United Kingdom
• Contributions in Parliament at Hansard
• Voting record at Public Whip
• Record in Parliament at TheyWorkForYou