andmark Protective Services provides our customers with "Peace of Mind" by providing qualified security associates who possess a passion for excellence and a dedication to professionalism. Landmark Protective Services, Inc. is a privately owned corporation fully licensed by the Texas Commission on Private Security. (TCPS License #C11509) Landmark Protective Services is owned and managed by a certified Texas Peace officer with over 27 years of security and law enforcement experience. Landmark Protective Services offers on-site security associates, and professional investigation services for our clients corporate office buildings, retail centers, multi-family residential developments, medical facilities, manufacturing and warehouse facilities and other commercial properties on a contract basis.