DSI - Key Persons


Anthony Magelky

Job Titles:
  • Service Manager
Anthony Magelky has over 19 years of experience in the fire alarm and fire suppression industry. Anthony started as a field technician in 1998 and has progressed through the ranks as the installer, senior technician, project manager, and service manager. Anthony has been factory trained and certified in multiple systems by such manufacturers including:Siemens(Cerberus Pyrotronics), Fike, Fenwal, Kidde, Xtralis/Vesda, and others.

Christopher B. Ennis

Job Titles:
  • Partner
Christopher B. Ennis began in the fire protection industry in the seventies. Beginning as a systems designer he quickly became management material for a multi state Fire Protection Contractor. Working for this company gave Chris his first experience with running a business. Since that time his exposure to all facets of the business have gained him first hand experience in design, equipment procurement, supervision of field personnel, and management of the sales department for a multi-million dollar fire protection company. Chris holds a NICET level III certification in Special Hazards, and State of Texas planner's license. Chris is also a past President of the Houston Chapter of the American Society of Plumbing Engineers, a current member of the National Fire Protection Association, past Board of Director for the Fire Suppression System Association, along with many community and civic responsibilities.

Jorge Medrano

Job Titles:
  • General Manager
Jorge began in the first protection industry in the mid eighties. After a short time in the industry, Jorge's abilities were recognized, and Jorge was promoted to a Project Manager for a worldwide fire protection company. Jorge's responsibilities included the supervision of projects in the United States, Thailand, China, the Philippines, and other countries through out the world. Jorge holds a State of Texas license for fire suppression systems and fire alarm systems. Jorge is currently NICET Level III certified for Special Hazards, and Level II for fire alarm.

P. Mark Thomasson

Job Titles:
  • Partner
Mark Thomasson began his association with the fire protection industry in 1981 while building turnkey data centers throughout Houston and Dallas. Halon 1301 was the suppression agent of choice at that time. In 1987 he began working full time with fire detection and suppression systems as Director of Domestic and International Operations for a local fire protection company. In 1996 Mark moved into sales and in 2000, started DSI with his partner, Chris Ennis. Mark holds a State of Texas license for fire suppression systems and fire alarm systems. Mark is currently NICET Level III certified for special hazards, Level II for fire alarm, and Level II for sprinklers. Mark is also a Certified Fire Protection Specialist tested and listed by the National Fire Protection Association, one of a very few throughout the United States