For the past two years, Boston Rotaract has been on a roll, helping raise money for charitable causes around the globe.

For the past two years, Boston Rotaract has been on a roll, helping raise money for charitable causes around the globe.

And now the community service organization, which is sponsored by the Boston Rotary Club for men and women ages 18 to 30, is in the midst of one of its most ambitious campaigns to date: collecting and delivering wheelchairs for handicapped children in Guatemala.

Rotaract members got the idea for the project after Katie Williams, a Rotaract member and nursing student at Simmons College, traveled down to Guatemala to provide care to villages near the San Lucas Toliman mission. While there, Williams said she saw that charities were well stocked with medicines but were distinctly lacking in some basic kinds of healthcare equipment, such as wheelchairs. Many children who had disorders such as cerebral palsy, she said, had to push themselves around in wooden wagons or had to rely on their relatives to carry them around. Others, she said, were simply confined to their beds.

By the end of the summer, Rotaract hopes to collect at least 10 wheelchairs that it can renovate and fly down to Guatemala. According to Nick DiMatteo, a Rotaract member who works in business development for the Wellesley-based Atlantic Consultants, said that the rough terrain in the villages made it necessary to substantially alter the wheelchairs.

“What you have to do is take the small rubber tires off of the wheelchair and put mountain bike tires on them so they can go over rough surfaces,” said DiMatteo, who recently became Rotaract’s official liaison to the Boston Rotary Club. “They have no paved surfaces down there.”

Williams said that in addition to installing mountain bike tires, the wheelchairs would also likely require some additional padding and refitting to make the chairs good fits for the children’s bodies.

“We have some members who are MIT students and have engineering experience, which is really fortunate,” she said.

In addition to its international work, Boston Rotaract has also helped contribute to many local charity events over the past two years, including the annual Walk for Hunger, the Little Brothers Friends of the Elderly Easter and Thanksgiving holiday visits, and ReadBoston’s Boston Book Drive. They have also spent time volunteering at Rosie’s Place, a women’s homeless shelter in Boston. Shannon O’Brien, a Wellesley resident who has spent the last year as Rotaract’s president, said that she felt satisfied with the group’s accomplishments over the last year.

“We’ve collected clothes, we’ve wrapped Christmas presents, and now we’re planning a career-counseling project to help people at the [Quincy-based] Long Island Homeless Shelter get back on their feet,” said O’Brien, who is stepping down as president of Rotaract and is planning to attend the Harvard Graduate School of Education in the fall to work toward her master’s in education. “Oftentimes, we’ve found that people appreciate young people taking the time to acknowledge them.”

Although O’Brien, who graduated from Wellesley High School in 1997, will no longer be president of Rotaract, she said she hoped to stay involved in the club throughout graduate school and that she hoped to see it continue its growth.

“The key over the last year was to establish ourselves as a group,” she said. “In the next year, I hope to see more teamwork, bigger and better projects, and more recruiting of more members.”