- , 1953– Company started by Critten family, known as Longwood Furnace.
- 1974– Longwood starts nationwide distribution.
- 1978– The company entered Metal Fabrication Sub-Contractor business.
- 1981– 30,000 sq. ft. expansion of the company begins
- 1986– Longwood Furnace Company sold and name changed to Landmark Manufacturing Corporation
- 1996– Additions to facility, totaling the factory to 45,000 sq. ft.
- 1997– A 30,000 sq. ft. press addition to the facility, 1,000 and 2,000 ton press purchased, and Landmark becomes ISO 9002/ QS 9000 registered.
- 1998– A 70,000 sq. ft. warehouse addition started and 3 robotic welders added to the facility.
- 1999– The 70,000 sq. ft. expansion completed and 5 more robotic welders added to the facility.
- 2000– Landmark purchases a 600 and 1,500 ton press.
- 2002– Landmark purchases Electrostatic Paint System.
- 2003– E-Coat line construction begins (70,000 sq. ft.), Landmark installs 2,600 watt Trumpf laser and 600 ton press.
- 2004– Landmark installs 1,000 ton Hydraulic Press and purchases new computer system.
- 2005– Completion of Electrostatic Paint Line and an addition of dual headed robotic system.
- 2006– A 40,000 sq. ft. expansion started and completed, installation of 2 additional 600 ton presses, and the addition of 10 robotic systems.
- 2009– Landmark adds Mitsubishi LVP 4000 watt to the facility.
- 2012– Installation of 120 ton CNC press brake and Laser Oxide Removal Machine.
- 2013– Landmark installs 2 new Mitsubishi Vertical Milling Machines.
- 2015– Installation of FARO Edge, 7 axis, Precision Measuring Equipment.
- 2018– Landmark adds New Equipment (Uni Roller / Servo Roll Feeder and Conveyor.
- 2019– Additional Equipment added: Panasonic PerformArc Robotic Welding System / Articulating Manipulating Arm / Servo feeder with Attachments.
- 2023-New Equipment added: Mitsubishi 3015GX-F 10,000 watt Fiber Laser, 2 Scantech KSCAN 3-D Scanners for precision measurements.
