Xdot Engineering Consultants and Staff

We strive to be a company that we would want to work with.

Xdot Engineering and Analysis, PLLC is a Virginia Professional Limited Liability Company specializing in foil bearings, rotordynamic consulting and related R&D. Xdot has developed a unique, high performance foil bearing configuration to meet the needs of machines being developed by our customers.

Xdot was founded in 2003 by Dr. Erik Swanson. The initial focus of the company was rotordynamics consulting, foil bearing application assistance and related software development R&D projects.  In 2010, Xdot moved into a 1750 square foot space that combined office and test area to support a DoD research contract (SBIR Phase II project) related to windage power loss reduction in high speed electoral machinery.  Xdot moved again in 2014 to the current 2200 square foot facility with additional lab space to support a growing team with an expanding portfolio of internally and externally funded research projects, as well as low volume foil bearing production.


Xdot focuses on providing accurate, honest, timely, cost effective results to its clients while actively maintaining internal research projects to develop new tools and capabilities and explore new ideas.

We thrive on difficult, unusual and challenging jobs.

Our Team:

Dr. Erik Swanson


Erik has been involved in rotordynamics, hydrodynamic bearings, and testing since the early 1990's. He combines a very broad analytical background with considerable hands-on time getting his fingers dirty in the test lab.   Erik provides overall technical and business leadership for the team at Xdot.  He is the co-inventor of Xdot's proprietary "wing foil" compliant bearing configuration.  As a consultant, he has evaluated the rotordynamic performance of hundreds of rotating machines, ranging from small high speed machines operating at nearly 500,000 rpm, to industrial turbomachinery, to a 1200 MW nuclear steam turbine generator train rotor weighing over 1,000,000 lbs.  He has been the technical lead on over 25 bearing test rigs and testing projects.  His experience and capabilities include rotordynamics; compliant foil bearing design, development and testing; hydrodynamic bearing design and development; active magnetic bearings and backup bearings; bearing test rigs; and software development.  Erik did his graduate work at Virginia Tech in Dr. Gordon Kirk's Rotordynamics lab, receiving both MS and PhD (1998) degrees in Mechanical Engineering.  Prior to forming Xdot, Erik was the manager for the Department of Machinery Dynamics and Tribology at Mohawk Innovative Technology, Inc.  He has authored 35 papers on bearings and machinery dynamics.  He is a licensed Professional Engineer in North Carolina and Virginia.  He is a member of ASME, STLE,  and Sigma Xi.  He was a member of the API 684 3rd Edition Task Force, and has been helping teach Xdot's rotordynamics short course since 2012.

Erik's hobbies include sailing, hang-gliding and performing long form improvisational comedy.

Susan Thompson

Office Manager

Susan joined Xdot in July 2010 bringing with her 20+ years experience managing offices across various industries. She handles the bookkeeping as well as the day-to-day operations of Xdot and is proficient with all Microsoft products, QuickBooks, experience in payroll, payroll reporting and project costing. In addition, Susan was part owner of a residential construction company while living in Montana.

In her off time Susan enjoys gardening, traveling, enjoying life with her Havanese baby, Miss Aspen, fishing, baseball and NASCAR.

Charlie Bishop

Mechanical Technician

Charlie joined Xdot in April 2017 and he is no stranger to mechanical repair, installation, and maintenance, having spent 30+ years in the mechanical contracting industry. Charlie assembles, operates, and maintains Xdot's test rigs and support equipment. Charlie came to Xdot as a mechanical journeyman with a strong background in HVAC.