Meet the Instructors



Instructors-Barker-Hammer-Doug-Heiferman Doug Heiferman

IICRC Upholstery Cleaning (UFT)
IICRC Carpet Cleaning (CCT)

As an Approved IICRC Instructor, Doug Heiferman has traveled the United States teaching textile cleaning and restoration courses for the past eleven years. He instructs classes on oriental rug cleaning, tile and grout cleaning, wood cleaning, leather cleaning, odor control as well as business marketing and management classes.

In addition to teaching, Doug is an IICRC Certified Master Textile Cleaner and was owner/operator of a successful textile cleaning and restoration company for 16 years. Doug has a diversified business background and has gained valuable experience working for corporations such as Lillian Vernon, Federated Department Stores, and Citibank in the areas of purchasing, inventory control, credit and collections, and finance. He has earned degrees in Business Administration and Political Science.

Doug’s positive attitude combined with a motivating teaching style makes him one of the most requested instructors in the country. He is well known for teaching his students how to be ultra competitive in today’s fast paced business environment through the use of advanced technical skills and innovative sales and marketing techniques.

As owner of DH Seminars, Doug Heiferman has trained and motivated thousands of individuals in the field of textile cleaning and restoration services throughout the United States for the past 14 years. He is a Clean Trust Approved Instructor and Certified Master Textile Cleaner and additionally holds certification in upholstery cleaning, odor control, water damage, repair and reinstallation, health and safety, and color repair. As a Clean Trust Approved Instructor he teaches a wide array of classes including Clean Trust certified carpet, upholstery and odor control technician. He also offers specialized training classes in leather, oriental rugs, tile and grout, wood as well as marketing and management seminars.

In addition to his passion for teaching, Doug provides consulting, business development and technical support services through his company DH Seminars. Doug’s belief in hands-on training, lead him to develop the Power-Up Hands-On training classes in textile maintenance offered through Bridgepoint. Visit for additional information.



Randy Pierce IICRC Instructor Randy Pierce

IICRC Trauma & Crime Scene (TSCT)
IICRC Health & Safety (HST)

As an Approved IICRC Instructor, Randy has traveled the United States teaching textile cleaning courses for the past several years. He instructs classes on carpet cleaning, upholstery cleaning, trauma scene clean up and odor control as well as business marketing classes. In addition to teaching, Randy is an IICRC Certified Master Textile Cleaner, Master Water Restorer, Master Fire Restorer and the owner/operator of a successful textile cleaning and restoration company for 19 years. Randy has a diversified business background working in the Air Force, Pepco, and apartment communities learning not just cleaning skills but management and leadership skills. Randy has also been involved with Boy Scouts as a scoutmaster and committee chair for the last 19 years.



David Oaks IICRC Instructor David Oaks

IICRC Carpet Cleaning Technician (CCT)
IICRC Water Restoration (WRT)

David has worked in the field of cleaning and restoration since 1973. He owned and operated a full-service cleaning and restoration firm for 42 years which provided fire and water damage restoration services. David has worked on both commercial and residential restorative drying jobs in all capacities. He also does consulting for both insurance companies and restoration contractors. David is admitted as an expert witness in State and Federal Court. David is an IICRC Certified Senior Carpet Inspector, Master Cleaning Technician, Master Restoration Technician and is a Certified Restorer and Certified Mechanical Hygienist by the RIA. As an IICRC approved Instructor he teaches the RSA Restorative Drying (WRT), Applied Structural Drying (ASD), Carpet Cleaning Technician (CCT), Odor Control Technician (OCT), Fire and Smoke Restoration Technician (FSRT) and Trauma and Crime Scene Technician (TCST) courses. David was the Vice Chairman of the ANSI/S540 Trauma and Crime Scene Cleanup Standard and Technical Advisory Committee (TAC) Chairman for development of the TCST certification program.



Bill Weigand Instructor Bill Weigand

IICRC Water Restoration (WRT)

Bill Weigand has been in the cleaning and restoration industry since 1980. Bill joined Unsmoke in 1988, when he was hired as General Manager of its service company. In 1992 Bill was promoted to General Manager of Training and Technical Support for Unsmoke Systems. Bill has had the opportunity to put his restoration knowledge to work on-site disaster restoration projects throughout North America and the Caribbean. He has help to develop many odor control products and techniques which have become industry standards. Bill is an instructor for the Restoration Industry Association’s Certified Restoration Course as well as several courses for the IICRC. He has trained several thousand students for the IICRC. Bill holds multiple designations with the IICRC as well as the Restoration Industry Association and Indoor Air Quality Association.



Bob Merkt, Instructor Bob Merkt

IICRC Stone, Masonry Ceramic Tile Cleaning (SMT)

Bob Merkt is the owner of MEGA – The Merkt Educational Group and Associates. He has been in the cleaning and training business for over 35 years. MEGA is a division of Kettle Moraine Professional Cleaners, Inc. Bob, along with his wife Linda, are the owners/operators. Kettle Moraine Professional Cleaners, Inc. is a full service commercial custodial, carpet, upholstery and hard floor cleaning company. Kettle Moraine Professional Cleaners also has a full-service residential cleaning division offering carpet, upholstery and hard floor care.

Bob is an invited speaker at industry events, author and contributor to many industry publications. He is an Institute of Inspection, Cleaning, Restoration Certification (IICRC) approved instructor. In addition, he is an IICRC Master Cleaner and past chair of the IICRC Floor Care Technician (FCT) Committee. Currently Bob is the vise chair of the Stone Masonry Technician (SMT) course and a member of the FCT committee. He is an instructor specializing in training the adult learner. He performs his classes and hands-on training in an energetic, humorous and easy to comprehend style that his students enjoy.



Jessika James

IICRC Contents Processing (CPT)
IICRC Odor Control Technician (OCT)

Jessika is a second-generation residential and commercial cleaning and restoration technician with over 27 years of in-field experience. She is an approved IICRC Instructor for CCT, CCMT, UFT, OCT, FSRT, WRT, Trauma Scene 101, and Microbial Remediation, and she currently serves on the Board of Directors of the IICRC and is Chair of the CCMT and UFT committees. She was recently awarded the prestigious IICRC “Favorite North American Instructor” trophy, and in 2016, Jessika was recognized by R&R Magazine as one of the top three women in the industry ( In addition to her work with the Restoration Sciences Academy, Jessika also teaches a variety of courses with Legend Brands’ Cleaning Professionals Academy.



Sean Burgess

Xactimate Training

Sean is an Xactimate Certified Trainer (XCT) with extensive experience in both the claims adjusting and restoration service provider fields. With more than a decade of adjusting experience from both the field and as a trainer, Sean understands the intricacies of the insurance market. Balance with real world experience as an estimator in the restoration industry, his perspective is highly unique and invaluable. He has been commended on several occasions for his command of the technical aspects of effective project estimating, however is also regarded as a highly effective trainer, with a gift for translating what he teaches into practical, real world application.



John Carter

IICRC Carpet Repair

My name is John Carter and I am a Portland Oregon native. After high school had the pleasure of serving four years in the U.S. Army as a “Green Beret” in the 5th Special Forces unit at Ft. Bragg, North Carolina. Upon exiting the Army, I attended Portland State University, and earned a bachelor’s degree in business administration and marketing. While attending college, I started a small janitorial service with a budget of less than $400.00, which quickly transformed itself into a professional carpet cleaning and restoration company in 1978. Our professional services company eventually grew into a six truck operation that catered to repeat and referral customers exclusively.

In 1993, I handed over the operation of the cleaning and restoration operation to my nephew Darin, who still runs the company to this day. I was then free in October of 1993 to begin a new business venture in the wholesale distribution trade. Since 1993, Cleaning and Restoration Supply has grown to be one of the largest suppliers of professional carpet and restoration equipment in the industry with locations in Portland Oregon, Southern Oregon, and Albuquerque New Mexico. In October of 2019, we sold the distribution business to Aramsco Corporation. Now I am focusing on teaching IICRC certification courses and teach both live and live stream classes in the categories of CCT, UFT, OCT, RRT, CRT and Senior Carpet Inspector.

I started teaching in the late 1990’s and the IICRC categories that I teach for Barker-Hammer are:

  • Color Repair Technician
  • Repair & Reinstallation Technician

My teaching is based on what I would call “Real World Experience” as I have been involved in all aspects of our industry from all perspectives. As I draw from my 44 years in the industry, I don’t teach just theory but rather how to be the best you can be from all of my industry experience. Both the Color Repair Technician Course and Carpet Repair Technician Course have a heavy emphasis on “Hands-On” training so each student can become proficient in these skills upon the course completion.


Dane Gregory

IICRC Commercial Carpet Cleaning

Coming soon . . .



Ken Sellers

IICRC Applied Microbial Remediation

Coming soon . . .