Finished in 5th position of the combined rankings at the 2006 Qubica-AMF World Cup in Caracas, Venezuela.

At the 2007 World Ranking Masters held in Lake Wales, Florida, she finished in 3rd position when she lost the semifinal match to England's Zara Glover.

Bronze medallist at the 2007 Pan American Games in Rio de Janeiro. Defeated Colombia's Paola Gómez 2 - 0 to win the bronze medal match in the individual event.

Playing at the 2007 Qubica-AMF World cup, in the city of St Petersburg, Russia, Guerra fished in 7th position after the final round.[1] Champion at the 2008 PABCON Ranking Championships, held in San Salvador, El Salvador. Finished 12th in 2009 PBA Women's Series Tour Trials and earned Exemption to compete in the PBA.

In 2010 she won her biggest title to date at the QubicaAMF Bowling World Cup.

2010 Qubica AMF Bowling World Cup
The 46th QubicaAMF Bowling World Cup was held for the third time in France, at Bowling de Provence centre in Toulon. A record 167 bowlers (91 men and a record 76 women) from 92 nations competed. In the women's division, Aumi Guerra became the first bowler from Dominican Republic to win the QubicaAMF BWC, defeating tournament leader the South Korean Gye Min-Young 2-1 (203-226, 202-196, 240-196). This was the third time a Korean bowler finished 2nd (previously in 1997 and 2007). 

2011 Qubica AMF Bowling World Cup
For the second time after 1993, Northcliff Bowling Center in Johannesburg, South Africa hosted the QubicaAMF Bowling World Cup. The defending champions from 2010, Michael Schmidt and Aumi Guerra, were back for a chance of a repeat title. Incidentally, the 1993 AMF World Cup in Johannesburg also featured both defending champions.

Guerra dominated the women's division in setting records for three game series (803), five game block (1304), and average after qualifying and top 24 (241.00). She easily clinched the top seed for the stepladder finals, averaging 238.00 for 36 games. In the final she faced 2006 Champion the American Diandra Asbaty. Guerra handily won game 1 behind 11 strikes 266-201. Asbaty won game 2 227-214 to force a game 3. In game 3, Asbaty needed a strike on the 1st shot in the 10th frame to win the title, but left a 10 pin and Guerra prevailed 202-199. Guerra became the fourth woman after Jeanette Baker (1982, 83), Pauline Smith (1981, 93) and Shannon Pluhowsky (2002, '04) and the seventh player overall to win multiple BWC titles. Guerra and Baker are the only players who have successfully defended their title. 

2012 Qubica AMF Bowling World Cup
The 48th QubicaAMF Bowling World Cup visited Poland for the first time, held at Sky Bowling Center in Wroclaw. Aumi Guerra was attempting to become the first bowler in QubicaAMF World Cup history to win a third BWC title in a row. The women's division was dominated by three women who all averaged over 230 to qualify for the stepladder finals. Guerra qualified as top seed for the stepladder finals and was joined by No. 2 seed English Kirsten Penny and No. 3 seed Shayna Ng from Singapore. Ng defeated Penny in the semifinals 2-0 (246-215, 231-191) to advance to the finals to face Guerra. Guerra won the first game 269-224, needing one more win for the three-peat. However, Ng won the last two games (267-259, 247-169) to become the second Singaporean to win the World Cup. Incidentally, both times Singapore has won the BWC in the women's division, it was against the defending champion.