Professionally, Flanagan has been employed by companies in the insurance industry, with a focus on Financial Management and Software Design/Implementation.[3]
During his tenure in the House, Flanagan served as Majority Leader and Vice Chairman for the Labor, Industrial, and Rehabilitative Services Committee.[5]
He filled the one year remaining on the term of a Brookline Town Selectman who had resigned. He then successfully ran for an additional three-year term, giving him four years of service on the board. Flanagan also served a total of eight years on the Brookline Finance Committee and, in his final year, he was elected chairman by his colleagues.[3]
During Jack's early years of service, while his children were school aged, he served on the Brookline School Board. He also served as Chairman during the final year of his two, three-year terms. In addition to serving on the Brookline School Board, Flanagan also served on the Hollis/Brookline Cooperative School Board for three years, including the final year as vice-chairman. During his nine years of service on the SAU 41 Board, a prerequisite for any school board member, Flanagan was chair during his final two years of service.[3]
In August 2015, Flanagan endorsed John Kasich for president, who in September 2016 endorsed Flanagan for Congress.[7][8] Jack Flanagan is a moderate Republican.[9][10]
^ abJonathan Martin (August 13, 2015). "John Kasich's Appeal to Moderates Gains Traction in New Hampshire". The New York Times. ...Kasich dismisses suggestions that he is a risk to himself, but some of his supporters recognize the danger. Jack Flanagan, the majority leader of the New Hampshire House, said it was the product of Mr. Kasich's four decades in politics. 'After a while you get sort of hardened a little bit,' said Mr. Flanagan, searching for the right word. 'I don't want to say sarcastic. But he's getting better. He deals with it.' Mr. Kasich insists...
^ ab"NH House passes vetoed title loan bill". Boston.com. January 4, 2012. ...Opponents said it would trap people in high-interest loans they could not repay. State Rep. Jack Flanagan, R-Brookline, said New Hampshire already has three title loan businesses with 16 locations charging 36 percent interest on loans secured by vehicles. 'Where's the downside to that?' said Flanagan, who argued against passing the bill.
^Reid Wilson (January 7, 2015). "The New Hampshire State House is a total mess". The Washington Post. ...But Jasper has been busy installing his own partisans in top positions. House rules allow Jasper to appoint his own majority leader, a job he gave to state Rep. Jack Flanagan (R). He picked Chandler, the former speaker who lost to O'Brien in the initial leadership vote, as his deputy speaker, and he booted two prominent O'Brien supporters from their committee assignments.
^Paige Sutherland (Jun 24, 2015). "House and Senate Pass 2016-2017 Budget". But House Majority Leader Jack Flanagan of Brookline said this move would essentially be like cherry picking the budget. 'I believe it is unfair to the people of New Hampshire, to say you oppose a budget and simultaneously propose an amendment that seeks to borrow from it,' he argued.
^Darrel Rowland (June 17, 2015). "John Kasich out talking to voters in New Hampshire". Archived from the original on August 23, 2015. Retrieved August 27, 2015. ...a governor in the 1980s, was among Kasich's key New Hampshire supporters who were guiding various political dignitaries toward Kasich before the dinner. One was Jack Flanagan, leader of majority Republicans in the Granite State's House of Representatives. He didn't officially endorse Kasich, but he sang his praises, saying...
^Allie Morris (March 24, 2015). "House Finance Committee pushes ahead budget proposal". ..."The budget process is never easy and I commend the Finance committee for all of their hard work and appreciate the tough decisions they had to make throughout this process," House Majority Leader Jack Flanagan of Brookline said in a statement. "I believe the final product is something Republicans will stand by as a fiscally responsible, balanced budget that does not raise taxes and slows the growth of government."...