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Two Roles, One Hospital, A Shared Commitment to Care

By Marcela Quintanilla-Dieck | People of MGB | 0 comment | 19 March, 2026 | 1

This story follows a mother and son, and the work at Mass General Brigham that brings them together. 

Darlene Leaston, left, a longtime parking attendant at the Wang building and her son Joshua Leaston, a first year resident at MGH
Darlene Leaston, a longtime parking attendant at Massachusetts General Hospital, and her son Joshua Leaston, MD, a first-year resident in the Department of Surgery

Just before the day begins, while Massachusetts General Hospital (MGH) is still fairly quiet, Joshua Leaston, MD, makes his usual stop between patient rounds. He picks up two coffees, one iced for himself and one hot for his mother, Darlene Leaston, and carries them through the hallways of the hospital.

He drops hers off at the valet parking station in the Wang building front entrance desk, where she works, exchanges a few words, and heads back to his patients.

It is a small ritual, easy for anyone else to miss. For them, it carries a deeper meaning shaped by resilience and years of shared purpose.

 

At the Front Door

For 26 years, Darlene has worked as a parking cashier at Massachusetts General Hospital, greeting people as they arrive carrying uncertainty and leave carrying whatever the day has brought them.

Over time, she has learned that these moments matter more than we think. How someone is greeted, how they are spoken to, and how much patience is shown can shape how someone remembers their time at the hospital.

“I like to take care of the customers,” she says. “To do my best at making sure that at the end of the day, their last experience here is positive.”

Darlene approaches each interaction with the same intention. She listens, makes eye contact, and takes a moment to understand the person in front of her. She wants to make sure that no matter what someone has faced inside the hospital or the news they have received, their final interaction feels respectful, empathetic and kind.

 

Darlene Leaston (L) and Hattie Cross (R - Josh's grandmother) circa 2001 to 2006 with Bonnie Michelman (the head of MGB Police and Security who just retired, at an award cermony.
Darlene Leaston (L) and Hattie Cross (R, Josh’s grandmother), circa 2001–2006, with Bonnie Michelman, the recently retired head of MGB Police and Security, at an award ceremony.

Those values did not stay at work. They followed Darlene home and, perhaps without her realizing, shaped the way her children saw the world.

Josh grew up watching his mother leave early for work and return the next day with the same steady commitment. She rarely talked about what her days held, but he noticed the consistency and sense of responsibility she carried home with her. It became clear that her work wasn’t just a job, but a way of caring for people. That quiet example left a lasting impression on him.

Josh adds, “I was always incredibly inspired by my mother… seeing her strength and resilience and wanting to follow her footsteps in my own way.”

Becoming a Physician

As a student, Josh gravitated toward science early on. He liked structure and problem solving, and he cared about learning for its own sake. “He was always into science,” Darlene recalls. “He enjoyed doing his science projects. He took it very serious.” He liked working with people and wanted his work to have a clear purpose and meaning.

He went on to earn his bachelor’s degree at Northeastern University, drawn to its emphasis on experiential learning and its ties to the city he called home.

Later, he continued his medical education at Stanford University in California, a move that took him across the country and far from family. The distance was difficult, but it clarified what mattered most. While Stanford offered new perspectives and opportunities, Boston continued to feel like home.

Joshua Leaston, MD and Darlene Leaston

Back to Mass General, Back Home

By the time Josh reached the end of medical school, the same values of compassion, humanity and purpose were still guiding him, even as the path ahead felt uncertain.

Like every graduating medical student, he entered the matching process for residency knowing that where he would train next was out of his control. Months of applications and interviews led to a long wait filled with possibility but little clarity.

Beneath the uncertainty was a quiet hope. Mass General Brigham—one of his matching targets—was familiar, not just as a hospital or system, but as a place woven into his family’s life for decades. Still, he knew the process could send him anywhere in the country.

On Match Day (March 21, 2025), that hope became reality. Darlene was at work when she got the long-awaited call from Josh.

“I was dealing with a customer,” she remembers. “Then I ran to the bathroom, and he told me, ‘Ma, I did it. I matched at Mass General’”

 

Shared Work and Values

At Mass General Brigham, Josh found an environment where the values he grew up with were not only familiar but actively reinforced. He is currently a PGY-1 resident in general surgery, marking the first year of his integrated training in Vascular and Interventional Radiology. Interventional radiology is a specialty focused on treating complex disease through image-guided intervention.

Josh’s training blends surgical fundamentals with advanced image-guided techniques, emphasizing preparation, precision, and responsibility. He is particularly drawn to high-acuity vascular and neuroendovascular care, including stroke intervention, where a neurointerventional radiologist can navigate through blood vessels under image guidance to restore blood flow to the brain when every minute matters. At its core, his approach to medicine is rooted in caring for the whole patient, not just the condition being treated.

The lessons of residency echo what he had seen modeled long before in the steady approach of his mom. Care is built through consistency, thoughtfulness, and respect, often in moments that are easy to overlook.

Today, Josh and Darlene move through the same hospital in different roles and at different stages of life, guided by that shared understanding. She continues to shape the experience of patients and families in small, steady ways. He now helps shape those experiences in operating rooms and procedural suites. Their paths are different, but they are grounded in the same sense of purpose and resilience.

Together, their stories reflect a broader truth about healthcare. It is not defined by titles or spaces, but by how people show up for one another. For this family, care has always been practiced quietly, over time, and across generations, rooted in the everyday work of a place they both call home.

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