About Us

Specializing in metal craft for the architectural, design, and fine art trades

Concentric Fabrication LLC is a custom architectural and sculpture metal firm co-founded by Rob Lorenson and Derek Riley in 2012. Specializing in metal fabrication services in the niche market of highly crafted one-of-a-kind architectural metalwork. Lorenson and Riley represent over 38 years of experience in metal working trades and are able to offer a range of design , fabricating, finishing, and installation services to their customers. The 5500 square foot shop was designed around designing, fabricating and finishing sculptures of all sizes. Pieces from 3 inches tall to 35 foot tall have been produced in our humble space. Our goal is to keep as much of the processing in house to ensure the best possible quality. Staffed by professional artist, we take great pride in making sure our clients receive the best possible product.

From specialized interior hardware, to staircases, railings and fine art commissions, Concentric Fabrication provides unparalleled service and insight.

Recently Completed

Wave Rail

Hand forged steel railing for a private residence, Southern Rhode Island.

"Wave Rail" ©Weatherlow Design LLC


Click through the thumbails below to examples of our work.

Observatory New Hampshire

Black Bronze Wrentham, MA

Five Story Boston, MA

Rob Lorenson Sculpture

Multi Level Modern Nantucket, MA

Derek Riley Sculpture

Loft Ladder nantucket, MA

Tech Stair Providence, RI

In Process

A sampling of projects at various stages of completion.

Our Team

Rob Lorenson

Owner/ Operator SHOP 508.672.4098 | CELL 508.454.5478

Derek Riley

Owner/ OperatorSHOP 508.672.4098 | CELL 508.873.1742

Gabriele Stone


Amy E. Riley

Marketing and Client Relations

Peter Howland

Lead Fabricator / Shop Foreman


Design and More

No Designer? No problem!

From private residential to expansive commercial projects, Concentric Fabrication LLC takes on all scopes. Our in house design team will work with you one on one, to help develop and bring to life your concept through digital renderings, drawings, and constructed samples. We not only work with metal, but have the knowledge and capacity to work with a multitude of materials; glass, wood, carbon fiber, stone, and concrete to name a few. Initial concepts are provided free of charge. If you would like to further develop your project with Concentric a design retainer based on the scope of work will be required. We love problem solving and have often picked up where others have waved the white flag.


Having the correct tool to efficiently produce your product is paramount

  • Eagle Bender CP30
  • Wire Teknik Swage Machine
  • Clausing floor drill press x2
  • Miller Trailblazer Portable Power Source
  • Miller XMT 304w/pulse-wirefeed + spool gun
  • Stroke Sander
  • Little Giant Power Hammer
  • Forging Press
  • Delta Rockwell 10 in table saw
  • Bertisch plate roller, 1/4"x 72" steel capacity
  • Chicago press brake 25 ton x 72"
  • Startrite H250A auto feed band saw
  • Powermatic vertical band saw
  • Jet miter bandsaw 18x10
  • 42 in Sandingmaster time saver
  • Lincoln power mig 350 x2. One is set up with a cobramatic push/pull
  • Ercolina CE50 roller bender
  • Lincoln precision Tig 275
  • Lincoln precision Tig 375
  • Lincoln Tig 200 Square Wave
  • Torch mate CNC plasma table 60" x 120" x 1" Capacity
  • Thermal Arc 201ts inverter portable welder (2)
  • Series 1 Bridgeport with DRO and auto feed
  • Boss 10 CNC Bridgeport
  • Clausing 9x46 in lathe
  • In House Capabilities
  • MIg,Tig Welding
  • Machining
  • CNC Plasma Cutting
  • Forming
  • Plate Rolling
  • Mechanical and Chemical finishing
  • Paint, Laquer
  • Hot Forging
  • Field Measuring
  • Custom Metal Fabrication
  • Detailing
  • Outsourcing Partners
  • Powdercoating
  • Electropolishing
  • Laser Cutting
  • Water Jet Cuttting
  • Social

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    Shop: 179 Riverside Ave, Somerset MA, 02725
    Mailing: 7 Coombs St, Middleboro, MA 02346
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    Concentric Fabrication LLC | All Rights Reserved.