There are now two Latin American women in the running for the position of secretary general of the United Nations.
As of now, there are 11 candidates to succeed Korean Ban Ki-moon , the current UN secretary general, whose tenure concludes January 1, 2017.
The UN has never had a female secretary general in its 70-year history, and some argue it's time for a woman to be at the helm.  Figueres and Malcorra aren't the only women nominated.  Croatian politician Vesna Pusic, UNESCO Director-General Irina Bokova of Bulgaria, former Moldovan Chancellor Natalia Gherman, and former New Zealand Prime Minister and current Administrator of the UN Development Programme Helen Clark are all being considered.
‘Without optimism…we won't be able to start moving forward’
Currently, Figueres is the executive secretary of the UN Framework Convention on Climate Change  (UNFCCC) and participated in the talks for that convention and the Kyoto Protocol . About climate change, Figueres warned  in 2015:
[…] que la lucha contra el cambio climático es un proceso y que la necesaria transformación de la economía mundial no se decidirá en una conferencia o en un acuerdo, [sino que es] “probablemente la tarea más difícil a la nos hemos encomendado, que es transformar intencionalmente el modelo de desarrollo económico por primera vez en la historia humana”.
[…] the fight against climate change is a process and the necessary transformation of world economy won't be decided by a conference or an agreement, [but it's] probably the hardest task we've engaged in, which is to intentionally transform the economic development model for the first time in human history.
When asked if she thinks Latin America supports her nomination, she answered :
[…] las candidaturas a la secretaría general de la ONU “no deben ser entendidas como candidaturas subregionales o regionales. Deben entenderse como candidaturas globales”.
[…] nominations to UN Secretary General “should not be understood as sub regional or regional nominations. They should be understood as global nominations.”
On the day of her nomination, Figueres said in her keynote address that she has the tremendous task  “of giving hope back to the world.” She noted that her priority is to achieve peaceful resolutions and strengthen the responsiveness of the organization during crises — all with a responsible and patient optimism:
Sin optimismo, sin la firme convicción de que nosotros los humanos sí somos capaces de solventar los problemas, no podemos ni empezar a avanzar.
Without optimism, without the strong conviction that we human beings are capable of resolving problems, we won't be able to start moving forward.
On Twitter, some users endorsed her nomination:
— David Garcia (@DavidG79) 8 de julio de 2016 
I really hope Christiana Figueres becomes UN secretary. She has previously done a great job at the UNFCCC.
— Diane Regas (@DianeRegas) 8 de julio de 2016 
The controversial nomination of ‘Doctor No’
The other Latin American candidate, Susana Malcorra , is an electrical engineer, and has served as executive director of the World Food Program. Between 2008 and 2012, she served as under-secretary-general of the United Nations for Field Support.
Her nomination, however, isn't free of controversy.
When she was serving as under-secretary-general, she was involved in the concealment of reports of sexual abuses  against minors by UN Blue Berets and peacekeeping forces during missions in Africa. It was during her tenure that Ban Ki-moon himself dubbed her “Doctor No ” because of her constant negative answers.
More recently, as Argentina's minister of foreign affairs, Malcorra has reaffirmed that the government will  take in a group of Syrian refugees, and she said that another group of displaced people from Central America could also be accepted:
Desde la Argentina estamos dispuestos a recibir refugiados con la idea de que en cada uno de los países está encontrar la solución.
— Susana Malcorra (@SusanaMalcorra) 28 de junio de 2016 
In Argentina, we are willing to receive refugees with the idea that each country has to find the solution.
Ban Ki-moon's successor may be announced by late November.