Our Team

We have a team of professionals who are whole-heartedly dedicated to providing services and products that best meet the customer's needs.   RIGAS is an independent service provider, so we can provide objective advice on what is best for the customer.  We are not beholden to any particular manufacturer.  Our goal is to provide the best service and best product to meet the customer's needs. 

Our technicians have over thirty-five years of combined service in the gas analyzer field.   Prior to their experience with gas analyzers, our technicians gained over 60 years combined experience in the instrumentation and electronics fields.

We also have dedicated and experienced customer support staff who work behind the scenes to support our technicians so they can focus on serving the customer.



Larry Runyan
President/Sr. Technical Support Engineer

Larry is an entrepreneur who knows the value of planning, hard work, and dedication. He honed his technical and management skills while serving for six years as a reactor operator aboard the USS Nathanael Greene, a ballistic missile submarine. He furthered his knowledge by working as an instrumentation and control maintenance manager at the nuclear power plant, Three Mile Island.

Larry has over twenty years of directly related analyzer service/repair experience and was the most experienced Rosemount employee on several analyzers manufactured by Rosemount Analytical, Inc. He also has an additional 15 years experience in related electronics, instrumentation, and control processes. In addition, he has broad business experience including managing both technical support and customer service operations, sales, research and development, and finance.

Mel Underwood
VP - Field Service Operations/Field Service Engineer

Mel Underwood is a skilled electronics technician who is quality oriented and customer focused. During his eight years with the U.S. Air Force, Mel gained recognition for his work maintaining, installing, testing, troubleshooting, and repairing some forty-two different systems on various aircraft. In addition, Mel served as trainer and supervisor reaching the rank of Staff Sergeant (E-5) before honorably discharging from the Air Force in 1994.

Mel also has over eight years' experience in the communications industry and was responsible for designing and installing custom emergency equipment for police, fire, and emergency medical vehicles, as well as, land based repeater sites; this included the antenna and coaxial transmission lines, remote control points, and mobile and portable radios.

Mel began his gas career with Rosemount Analytical in 2001 as a Technical Support Representative in the International Department. He dealt directly with customers, providing technical assistance (operational theory and troubleshooting) and administrative support. Mel generated sales quotes, repair quotes, warranty requests, and coordinated international shipments.

Mel joined RIGAS in 2004. He has since become well known in the industry for his expertise on all of the Rosemount OPM2000 analyzer models and on the opacity analyzers of several other major manufacturers (Teledyne, LAND, Durag, OPAL).  He also has considerable experience on the 5100A (CO analyzer), OCX4400 (combustibles analyzer). Mel resides in the town that Judge Orr founded (Orrville) (you might know that your favorite jellies and jams come from Smucker's of Orrville, Ohio).

Pat Robeck
Field Service Engineer

Pat received his initial technical training in his eight years in the Navy, serving as a Reactor Operator aboard the USS Dwight D. Eisenhower and USS Nimitz, and as Radiological Controls Shift Supervisor while aboard the USS Emory S. Land. Pat achieved the rank of First Class Petty Officer, and E-6.

 After leaving the Navy, he completed an Instrumentation and Controls Specialist Journeyman program while working for the Northern States Power Co.  , now known as Xcel Energy. Pat has since worked in many industries, including power plants, paper mills, refineries, and steel mills, giving him a broad spectrum of understanding of the many applications for analyzers. His calibration skills were developed while working in a Metrology Lab for the Lubrizol Corp. 

Laura Runyan, CPA

Laura has over 20 years of experience covering most aspects of financial management, tax, accounting and business ownership.  She was employed as a CPA with Ernst & Young, was a manager in the financial department of a Fortune 500 company, owned a CPA firm for several years, and was the controller for a Christian publishing company.

Laura and Larry have been married for over 11 years and have two sons.  Marriage and family are top priorities for Larry & Laura.