our story

For over 75 years, Seiler has provided world-class solutions in full-service contract manufacturing to partners across industries. Excellence is our guiding principle, and we promise an unparalleled level of quality in every project down to the last detail. As a family-owned and operated business, we also believe that strong relationships are just as important as the quality products and services we provide. While we specialize in high precision machining and optical instrument assembly, our commitment to growth has led to the establishment of five other divisions: Geospatial, GeoDrones, Medical, Planetarium and Design Solutions.

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our divisions

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Precision Manufacturing

Seiler Precision Manufacturing is a full-service contract manufacturer specializing in high precision components and assemblies serving the defense and aerospace markets.  From prototype to full scale production, in medium to high complexity, the Seiler Team will produce affordable high precision parts consistently and reliably.  In addition, from complex mechanical assemblies to electrical box builds, the Seiler Team is a turn-key partner for your precision machining and assembly requirements.

Precision Machining

  • 5-Axis CNC Milling
  • CNC Turning
  • Horizontal Machining
  • Vertical Machining
  • Expertise in Machining of Complex Castings



  • Precision Mechanical
  • Electro-Mechanical
  • Optical and Vision Systems
  • Weapon Systems and Components


Seiler Geospatial is one of the largest suppliers of brand name surveying and supply equipment in the Midwest. We offer our clients the most advanced survey, construction, mapping/asset management, and software technology on the market. We specialize in sales, service, repair and support.


Industries We Serve

  • Surveying and Engineering
  • Building and Construction
  • Mapping and GIS
  • Government and Utilities
  • Mobile Mapping
  • Forensics and Public Safety
  • Transportation Infrastructure
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Decorative image of a Seiler Medical microscope


The Seiler Medical Division offers a wide variety of Dental Surgical Microscopes for Enhanced General Dentistry and Endodontics as well as Colposcopes and ENT Microscopes for Medical applications. With over 75 years of optical experience, Seiler is a worldwide leader in the field of Microscopy.


We Specialize In

  • Dental Microscopes
  • 3D Surgical Microscopes
  • Colposcopes
  • ENT Microscopes
  • Compound Microscopes
  • Evolution Zoom Microscopes
  • Surgical Loupes


Seiler Planetarium is the exclusive distributor of ZEISS Planetariums in the United States and Canada.  We sell, repair, and service custom ZEISS projection systems designed to grow alongside your passion for exploring the stars.


Our Systems

  • Velvet LED Fulldome Projection Systems
  • Hybrid Planetarium Systems
  • Opto-Mechanical Systems
  • Seiler Essentials



  • Domed Screens
  • LED Lighting
  • Audio Systems
  • Seating Arrangements
Decorative image of a Seiler Planetarium employee performing repairs
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Design Solutions

We are a specialized reseller of the Autodesk Architecture, Engineering, and Construction (AEC) Collection.  Our Autodesk software solutions of BIM and CAD tools are powered by a focus on personalized customer service that give our partners the support they need to exceed their goals.


We Specialize In

  • Data Workflow Consulting
  • Implementation
  • Tech Support
  • Customized Training


Drones have revolutionized the ways mapping and surveying are done.  Our GeoDrones business is dedicated to providing a custom drone solution for your Unmanned Aerial Systems (UAS) needs.


Industries We Serve

  • Agriculture
  • Inspection
  • Mapping & GIS
  • Mining
  • Construction
  • Public Safety
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Eric P. Seiler, Senior

Eric P. Seiler, Senior

It is with sadness that we announce the passing of our beloved Chairman of the Board, Eric P. Seiler Sr.  Eric passed away peacefully on Sunday, January 7, 2024.  He was 95 years old.  His loss will be felt by all of us, as he was an inspiration to everyone here at Seiler.

Additional News
Seiler is Building Stronger Families

Leadership is thrilled to announce that as of September 12, 2022, all Seiler employees will be eligible to receive 3 weeks of paid time off following the addition of a child to the family. This includes the birth or adoption of a child or receiving recent legal...

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Precision-Crafted Careers

Our legacy of quality relies on growth, and we’re always looking for talented people to join our team. Take charge of your future and discover opportunities with Seiler.