Our staff's commitment to you

Our staff is committed to providing support, compassion, information, and direction as needed to all members of our community, their families, and friends who are dealing with loss and grief.

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Peter K. Leslie Licensed Funeral Director/Owner

Peter started working in a funeral home setting at a very young age cleaning after services, helping move flowers, and observing his superiors. Peter graduated from Bishop Timon/ St. Jude High School, completed his general studies at Erie Community College and Trocaire College, then moved onto completing the program at Simmons School of Mortuary Science in Syracuse, NY. Graduating in 1978, he served his apprenticeship locally, and contributes most of his practices today to what he learned during this time.

In 1982, as a licensed funeral director, Peter opened his first funeral home in the Old First Ward of Buffalo, NY. Peter served the families of this community for over thirty years, and in the process successfully bought Sieck, Mast & Leslie Funeral Home in West Seneca, NY to give families an alternative location.

In addition to owning the funeral homes, Peter opened Buffalo Niagara Cremation Service in 2002 in order to more adequately serve those families looking specifically for cremation services.

Peter prides himself in the fact that his businesses are completely family owned and operated. Peter, his wife, and daughter answer their phones, complete all of the paperwork, and meet with client families themselves, making sure to keep funeral arrangements and services a very personal interaction.

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Mary E. Leslie Office Manager

Peter’s wife, Mary, was born and raised in Buffalo, NY. She and Peter have known each other their entire lives, as their mothers were family friends. Mary and Peter married in 1988, and started a family. Peter and Mary have two daughters, and reside in West Seneca, NY.

Mary has always supported Peter in his business endeavors, and began working with him in 2009. Mary serves as the office manager, and completes paperwork, takes care of financials, and is a crucial part of our after-care programs.

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Margaret M. Leslie "Maggie" Licensed Funeral Director

Maggie was born in Buffalo, NY and raised in West Seneca, NY. After graduating from Immaculata Academy, she attended the University at Buffalo and Erie Community College to complete her general studies.

In August 2016, Maggie graduated from the American Academy McAllister Institute of Funeral Service in New York, NY. Maggie completed her apprenticeship, and is currently a licensed funeral director in the State of New York. She is proudly working with her father at Sieck, Mast & Leslie Funeral Home.

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Mary E. Sparks Registered Resident

Mary is the eldest daughter of Peter and Mary Leslie, and has grown up around the funeral business her whole life. She and her husband live in South Buffalo, NY, and are proud members of our community. Mary holds many degrees, and currently works with UB Orthopaedics as a Medical Assistant, which is her primary career.

Recently, Mary followed in her family's footsteps and in early 2018 she graduated from the American Academy McAllister Institute of Funeral Service in New York, NY. Mary is now a registered resident of funeral service, and will be serving her residency at Sieck, Mast & Leslie Funeral Home under the guidance of her family. While continuing to work as a medical assistant, Mary looks forward to being involved in the family owned business.

Peter K. Leslie

Licensed Funeral Director/Owner
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Peter started working in a funeral home setting at a very young age cleaning after services, helping move flowers, and observing his superiors. Peter graduated from Bishop Timon/ St. Jude High School, completed his general studies at Erie Community College and Trocaire College, then moved onto completing the program at Simmons School of Mortuary Science in Syracuse, NY. Graduating in 1978, he served his apprenticeship locally, and contributes most of his practices today to what he learned during this time.

In 1982, as a licensed funeral director, Peter opened his first funeral home in the Old First Ward of Buffalo, NY. Peter served the families of this community for over thirty years, and in the process successfully bought Sieck, Mast & Leslie Funeral Home in West Seneca, NY to give families an alternative location.

In addition to owning the funeral homes, Peter opened Buffalo Niagara Cremation Service in 2002 in order to more adequately serve those families looking specifically for cremation services.

Peter prides himself in the fact that his businesses are completely family owned and operated. Peter, his wife, and daughter answer their phones, complete all of the paperwork, and meet with client families themselves, making sure to keep funeral arrangements and services a very personal interaction.

Mary E. Leslie

Office Manager
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Peter’s wife, Mary, was born and raised in Buffalo, NY. She and Peter have known each other their entire lives, as their mothers were family friends. Mary and Peter married in 1988, and started a family. Peter and Mary have two daughters, and reside in West Seneca, NY.

Mary has always supported Peter in his business endeavors, and began working with him in 2009. Mary serves as the office manager, and completes paperwork, takes care of financials, and is a crucial part of our after-care programs.

Margaret M. Leslie "Maggie"

Licensed Funeral Director
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Maggie was born in Buffalo, NY and raised in West Seneca, NY. After graduating from Immaculata Academy, she attended the University at Buffalo and Erie Community College to complete her general studies.

In August 2016, Maggie graduated from the American Academy McAllister Institute of Funeral Service in New York, NY. Maggie completed her apprenticeship, and is currently a licensed funeral director in the State of New York. She is proudly working with her father at Sieck, Mast & Leslie Funeral Home.

Mary E. Sparks

Registered Resident
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Mary is the eldest daughter of Peter and Mary Leslie, and has grown up around the funeral business her whole life. She and her husband live in South Buffalo, NY, and are proud members of our community. Mary holds many degrees, and currently works with UB Orthopaedics as a Medical Assistant, which is her primary career.

Recently, Mary followed in her family's footsteps and in early 2018 she graduated from the American Academy McAllister Institute of Funeral Service in New York, NY. Mary is now a registered resident of funeral service, and will be serving her residency at Sieck, Mast & Leslie Funeral Home under the guidance of her family. While continuing to work as a medical assistant, Mary looks forward to being involved in the family owned business.