Tucker Lewis


Tucker was born and raised in Cambridge, MA. She went to UMASS Amherst and graduated with a degree in Fine Arts. Tucker loves all things Cambridge and Somerville, having been a lifelong resident and member of the community. Growing up and living in Cambridge has also influenced the businesses to be locally focused and involved with various community organizations. Her love of art and building objects heavily shapes the aesthetic of the stores.  She has built cabinetry, tables, shelves, counters, and countless other items for all of our shops. Most often, she can be found either in her office scouring over numbers in Quickbooks, building something in the wood shop or eating ice cream and m&m’s for breakfast. She is happily married to Melissa and they have two kids and a dog named Ounce.

Jennifer Park


Jennifer was born in Northern California and spent the early half of her life living and growing up in Japan. While she has spent the last 25 years in Massachusetts, she attributes a great deal of her love for food, service and work philosophy to her Japanese roots. Prior to opening Diesel, Jennifer had only had a handful of jobs which included selling high end comfort shoes, cleaning the Harvard dormitory bathrooms, and scooping ice cream. It was her love for ice cream, even on a winter night, that brought the two owners together. Currently, Jennifer focuses her time at work growing the businesses long term, developing staff, thinking about food and tasting food and drinks. Jennifer also has two young kids and a partner who help keep her focused on the important things: have fun, listen to music, and work hard. She is an avid runner, bike enthusiast and loves most things that involve moving… those who know her know she doesn’t sit still for long. She has run four marathons (Boston, New York, and Chicago) and now enjoys competing in local half marathons and 10K’s.

Jane Berry

General Manager, Diesel Cafe

Jane spent her formative years growing up just outside of Chicago where a sense of midwestern values and a love for all Chicago sports teams was instilled. In 2012, she moved to Waltham, MA for college. Once completed in 2016, she moved to Somerville. The day she moved in the neighborhood was her first time at Forge. The energy and sense of community there made it a new staple in her life. By Fall 2018, she was working in the FOH staff. Since then, she has held several roles and been trained a little in nearly every department (especially if you count scooping cookies as working in the bakery). She moved into her current position as Diesel’s General Manager in September 2020 and has loved being part of the Diesel family.
Pre-pandemic, she filled her days with taking and teaching barre classes, hanging with her friends, and exploring all the restaurants and bars in the area searching for cheese fries. Nowadays, barre is over zoom, she sticks to ordering in fries, and feels endlessly lucky to have some of her closest friends be the people she works with every day.

Harrison Seiler

Lead Trainer:
Diesel, Bloc, & Forge

Harrison was born and raised in Knoxville, TN. He initially moved to Boston to attend Berklee School of Music. After dropping out like so many others before him, he decided to stay put in Boston. He worked various food service jobs and a few years as a bike messenger before applying at Bloc to pursue a long-time interest in coffee. Since then, he has focused his time at work developing the coffee and tea program across Bloc, Diesel and Forge with an emphasis on educating and training staff in coffee history, knowledge and preparation. He currently spends time at all three locations working with staff on a wide range of skills including customer service, work flow and espresso preparation. Harrison lives in Cambridge with his partner and two young kids. He continues to play music in his free time while pursuing his wide ranging and ever shifting interests including literature, photography and cycling.

Sam Mulligan

Benefits Administrator:
Diesel, Bloc, & Forge

Sam is our benefits administrator, and has been working with the Diesel, Bloc, Forge team since 2013. When he’s not at one of the cafes, you can find him biking around Somerville, watching Shark Week, or playing music on his gameboy.