About Us

DMI offers you over 60 years of collective experience in prototype and production machining, along with expertise in efficient new product development and introduction.

A collaborative approach with engineering and drafting support helps you to reduce costs and improve product integrity. If you have the vision, but not the design, we’ll work with you to clarify and create it. We design and build fixtures and jigs and can work from electronic files, prints, verbal instructions, and sketches. Our skill with various metals and plastics helps you meet your requirements.

Our project management and manufacturing expertise, exceptional customer support, and scalable systems enable us to provide a comprehensive range of products and solutions. We perform custom machining and assembly and will facilitate additional services as agreed upon. Customers rely on our ability to quickly ramp-up to meet target dates and volume requirements.

Diversified Machining’s management team prioritizes trusted collaborations and has forged long relationship with customers, vendors, and partners throughout New England.

Phillip A. Holman (Phil)

After a successful 36-year career as president of Fourstar Connections, a contract manufacturing company in Hudson, MA, Phil is using his skills to help grow and expand the capabilities of Diversified Machining. His vision is to continue to develop capabilities inside Diversified and through affiliations, to support new product introductions (NPI), and design for manufacturability (DFM). All of this, while building a culture driven to achieve high levels of customer service.

Prior to starting Fourstar in 1986, Phil began his career working as a quality manager for a contract manufacturing company, and then went on to manage a start-up company as VP of operations, building automatic test equipment and bed-of-nails test fixtures. In 1981, he came back into the contract manufacturing industry as VP/ general manager of a cable assembly shop that grew over time to become a significant player in the New England market as a tier-two contract electronics manufacturer (CEM).

Phil and his wife Linda have four adult children, Sarah, Brian, Sean, and Cassie, and also five grand-children and one great-grandchild. In his spare time, Phil is actively involved in his community supporting multiple fundraisers, including the Interfaith Hospitality Network (IHN), a Worcester-based program that provides housing to families that are temporarily without a home. Phil also volunteers his time as a member of the Outreach Ministry Leadership Team for First Church in Sterling, MA.

Chet MacDonald

Chet is the founder of Diversified Machining, which began business in 1992. He and his business partner Bob Mitchell had worked together at King Instruments for 16 years, and decided they wanted to go out on their own. They started Diversified … and their first customer was King Instruments. In 2021, Bob sold his share of the business to Phillip Holman. Chet brings 38 years of machining experience to the company.

When Chet is not working at Diversified Machining, he enjoys snowmobiling, golfing, and boating. Chet is married and has three adult children, and four grandchildren.

Brian P. Holman

Brian has spent his entire career in manufacturing and brings with him extensive experience in logistics,his most recent position being a senior buyer at Genuine Cable Group in Leominster, MA. He was instrumental in his roles at Fourstar Connections as purchasing manager and in the valuable time he spent in shipping and receiving and production control and scheduling. The insight and planning strategies he brings to the table are valuable on countless levels.

Brian has always believed in creating strong partnerships with his supply chain relationships, and is highly respected in the industry as a man of his word. He is deeply motivated to provide a high level of customer service and excels at it. He embraces technology to increase efficiencies and raise productivity, and is proficient with Oracle ERP and Sage 100 ERP.

He and his longtime girlfriend Sandy have four children, Andrew, Jocelyn, Parisha, and Junior, who range from the youngest, Andrew at 6 years old, to 26-year-old Junior.

When he is not on the job, he enjoys summer activities—fishing and boating, among them—and is a huge fan of Boston sports. He particularly enjoys just getting together with friends and family for a cookout or just hanging out and relaxing.

Diversified Machining is fast, responsive, nimble, and easy to do business with.