At CDInspect, we are helping realtors past the point of the inspection process.  We bring to the table the ability to quickly resolve the sometimes complex building resolutions situations.  Looking forward we will be growing stronger in our capabilities of being the advocate for our clients and agents. 

Mark Warren, Recruiter/Trainer

Professional building inspector since 2000 with over 40 years in the construction industry, a licensed general contractor, a licensed electrician, a licensed HVAC service technician and apprentice plumber. Mark is married to his wonderful wife Treasa and resides in Granite City, IL.

  • An AAS in Mechanical Drafting from McMurray
  • An AAS in Liberal Arts from Southeastern Illinois College.
  • ASHI Member #205131 / Since 2000
  • Illinois License # 450.003739  Licensed since 2006

Terry Cook

Professional building inspector since 2010. With over 30 years in the construction industry, and a general contractor since 1998. Terry is also owner of Cook Properties, managing his own portfolio of investment properties. Terry is married to his lovely wife Pam and lives in Granite City, IL.

  • ASHI Member #260694
  • A BS in Electrical Engineering from Missouri Science and Technology
  • Illinois License # 450.004143 (Licensed since 2007)

Jason Warren

Professional building inspector since 2006 with over 20 years in the construction industry. Jason’s career has lead him all over the world which has given him a variety of skills and networks. Jason’s top priority is making a difference in peoples lives. You will often hear Jason say, “How can I serve you?”. In addition to CDI, Jason is also a Pastor at Skyline Church in Bethalto, IL where he resides with his wife, Annie, and their 2 children.

  • AAS in Construction Management Technologies from Southwestern Illinois College
  • Illinois License # 450.003600 (Licensed since 2006)

Nick Bifano

Building Inspector since 2017. Nick has learned from the top professionals in their industry. Passionate about people and learning, Nick is eager to serve in whatever capacity he can. Nick is married to his lovely bride Ashley and lives with her and his 3 dogs in Caseyville, IL.


Omar has been a part of the CDI team for close to a year. He works closely with Terry Cook as Cook Properties LLC and lives in St. Louis. Spanish is his first language and is available to translate for clients who may need those services