Adopted Woman Seeking Birth Mother Discovers They've Been Co-Workers for 4 YearsThough the two worked in different departments at InfoCision, an Ohio teleservices firm, 'they would come in contact around the building and during events,' a company spokesperson said.

Ever since La-Sonya Mitchell-Clark found out that she was adopted, the 38-year-old Ohio native has wanted to learn the identity of her biological mom.

And when Ohio's Department of Health decided to release a long-sealed trove of birth records last month for residents born between Jan. 1, 1964 and Sept. 18, 1996, Mitchell-Clark received the serendipitous surprise of a lifetime.

Her birth mother, Francine Simmons, is actually a colleague at InfoCision -- a local teleservices firm where the two have unknowingly worked together for the past four years. And that's not all: Mitchell-Clark also discovered that she has three sisters -- one of whom also works at InfoCision.

When Mitchell-Clark first received her birth records in the mail on Monday and saw the name Francine Simmons, she immediately plugged it into Facebook. Suddenly, everything clicked. "There's a Francine that works at my job,"Mitchell-Clark told ABC News. "She works in [volunteer recruitment] and she works at the front desk."

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Though the two are in different departments -- and Mitchell-Clark has been with the company for four years while Simmons has been with InfoCision for 10 -- "they would come in contact around the building and during events such as our corporate summer cookouts, parties and using the facilities or in the hallway," a company spokesperson said.

Following a tearful reunion, the two also discovered that they live just six minutes away from one another.

"I got pregnant when I was 14. I had her when I was 15," explains Simmons, who said she always wanted to reconnect with her daughter but never knew how. "I was put in a home -- a girl's home. Had her. Got to hold her. Didn't get to name her. But I named her myself in my heart all these years."

Mitchell-Clark added that her adoptive parents were wholeheartedly in support of the reunion. "They're going to be a part of this, too," she said.

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