She had also served as an adviser to the Bill and Melinda Gates Foundation and to Sarah Brown, the wife of former Labour Prime Minister Gordon Brown.
In the 2015 general election, she was elected as MP for Batley and Spen.
A true humanitarian at heart
Jo was co-chair of the Friends of Syria All Party Parliamentary Group and an enthusiastic member of parliamentary groups working towards problems that involved Pakistan, Kashmir and Yorkshire's regional economy.
16 Jun 2016
British MP dies after being stabbed, shot in her constituency
Helena Joanne 'Jo' Cox, a Britain Labour MP from Batley and Spen died after a man in her constituency stabbed and shot her.
Cox was a "Remain in EU" supporter.
Cox was airlifted to Leeds General Infirmary after the fatal attack in the market town of Birstall around 1pm GMT.
A 77-year-old man was also attacked but he survived and only sustained injuries.
Cameron and Corbyn express grief and shock
While Prime minister David Cameron called the loss a 'tragedy' and described Cox as a "committed and caring MP". Labour leader Jeremy Corbyn said Britain would be "in shock at the horrific murder" of the MP.
17 Jun 2016
The killer shouted 'Britain first'
The man responsible for Jo Cox's death had been captured by the local police.
At least three named witnesses claimed that the attacker was a white male, wearing a baseball cap who had screamed "Britain first" during the attack.
Other eye witnesses claimed that the MP was targeted after she got involved in an altercation between two arguing men.
Britain grieves the death of Cox
The campaigns of all the "Vote Leave" and "Remain" groups for the June 23 referendum on Britain's destiny in the European Union were suspended for the day after the attack.
MPs and others parliamentarians said they were horrified and paid their tributes to Cox.
Cox's husband Brendan Cox too in a statement asked the people to fight against the hate that killed his wife.
18 Jun 2016
World mourns Cox's death, killer says 'Death to traitors, freedom for Britain' in court
While the death of MP Jo Cox shocked the world, her killer Thomas Mair when presented in court said "Death to traitors, freedom for Britain".
President Obama called Cox's husband to express his grief; David Cameron and Labour leader Jeremy Corbyn brought bouquets at the scene of her death.
A fund created in Cox's memory raised over £250,000 ($359,000) and will go towads charities.