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About ComSec LLC

ComSec LLC is a world-class professional Technical Surveillance Countermeasures, TSCM and Cyber TSCM company serving clients in the US, as well as globally. Our company utilizes detection methodologies and equipment that have been proven superior at identifying eavesdropping devices and exposing surveillance tactics. When you choose ComSec LLC’s professional TSCM / Cyber TSCM services, you can be certain we are equipped and ready to perform an effective, world-class TSCM/Cyber TSCM service. Contact ComSec

  • Corporate TSCM Services

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    Contact ComSec

  • Residential TSCM Surveys

Counterespionage Expertise

J.D. LeaSure, ComSec’s President/CEO, is a Counterespionage Specialist who has been active within the counterintelligence, counterterrorism and TSCM fields for 26 years. He has extensive training, knowledge and experience in the identification of eavesdropping devices, espionage detection methods and the intelligence collection tactics most often employed by perpetrators of electronic espionage. Mr. LeaSure and his team have traveled the globe to provide counterespionage advisory services to businesses, chief executives, law firms, governments and high-profile individuals.
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    ComSec TSCM Services

  • ComSec Team

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    Eavesdropping Detection

Our Services

When your business or residence is under surveillance by an illegal eavesdropper, stopping the exposure quickly is critical. Our experienced team of TSCM, Cyber TSCM and Cyber Counterespionage professionals is ready to assist you. In fact, our specialists can respond to most emergency sweep requirements in less than 24 hours.

Services Options

When you suspect you are the target of illegal eavesdropping, you need…


Bug Sweeps

Could someone be listening or watching you? Absolutely! If you…

Cyber TSCM

Securing Information in an increasingly data driven world is…



Technical Surveillance Countermeasures (TSCM), is the Government …


  • “J.D. is of highest moral aptitude, character and intelligence that I have had the pleasure to work with for some time. I hold J.D.’s opinions at the highest esteem and respect. From the vast knowledge that he possesses, I consider Mr.LeaSure’s counterespionage expertise an asset in any business, diplomatic, intelligence or security venture on the global scale invaluable”.

    Jacob Goldberg,
    Government of Israel
  • “J.D.’s team responded to a highly critical situation within hours of the first contact. Upon arrival at the site – the project initiated immediately and resulted in an extremely satisfied client that subsequently requested J.D.’s team on followup engagements”.

    Jarrett Kolthoff, President/CEO SpearTip, LLC
    Hired ComSec for Cyber TSCM Services in 2010, 2011, 2012, 2013, 2014
  • “Mr. LeaSures extraordinary field experience for the past several decades helps to ensure both an accurate and sucessful meeting. His vast knowledge and equipment makes him the best in his field. I am so excited to describe my experieince with ComSec and assure all of you what great success I had hiring him. The best decision I have made. Don’t leave any doupt if, you have suspicions BRAVO”

    Mary Meyer,
    President of Osprey Spill Control (OSC)
  • “There is no other way to describe J.D., other than he is the quintessential consummate professional. I use his firm frequently for my high profile clients” Samuel Yount,

    Owner, S. Yount Investigations, Inc.
    Hired ComSec for Cyber TSCM Services in 2010, 2011, 2012, 2013, 2014
  • “I have known J.D. for a number of years now. J.D’s expertise in the areas of TSCM, Counterespionage and espionage detection methods is, by far, the most detailed and professional that I have seen in the industry. His skills and professional services come with my highest recommendation”! Kristopher Bleich, EnCE, C|EH

    Director of Forensic Services, SpearTip LLC
    Hired ComSec for Cyber TSCM Services in 2010, 2011, 2012, 2013, 2014
  • “J.D., so sorry for my late response. I did receive your report and have taken your recommendations to my IT manager for further action. Thank you for your professional service and your quick availability. Your work has allowed many of us to rest easier. Thank you for everything”. Top qualities: Expert, On Time, High Integrity

    “Jenny” PA, USA
    Hired ComSec for Cyber TSCM Services in 2013
  • “Thank you, J.D. I now know who to go to for future needs and who to recommend to my associates – yes, it’s you! Top qualities: Great Results, Expert, High Integrity

    “Robert” Washington, DC
    Hired ComSec for Cyber TSCM Services in 2013, 2014
  • “JD,Thanks for the detailed report, and for the thorough service. I would use your service again, and would certainly recommend you to others.

    “Todd” Knoxville, KY USA
    Hired ComSec for Cyber TSCM Services in 2013, 2014
  • “J.D. Your team did an excellent job at our facility. Truly an exceptional team and service! V/r”,

    “J.R.” D.C., USA
    Hired ComSec for Cyber TSCM Services in 2014
  • “Great team of experts who are proficient and knowledgeable in this business. It was a pleasure working with ComSec LLC”!

    “S.S.” MD, USA
    Hired ComSec for Cyber TSCM Services in 2014
  • “We are very satisfied, and happy with the personalized service and availability of ComSec to suit our customized needs”.

    “Fortune 100 Corporation”
    Hired ComSec for Cyber TSCM Services in 2014
  • “Your organization is one of the most professional and knowledgeable in the industry, that we have had the pleasure to work with…”

    “John” U.S. Defense Contractor
    Hired ComSec for Cyber TSCM Services in 2011, 2012, 2013, 2014
  • “The response and attitude of your team was outstanding. Will definitely use ComSec again”.

    “Bill”, Fortune 500 Corporation
    Hired ComSec for Cyber TSCM Services in 2013 & October 2014
  • Thank you! I appreciate how fast you were able to get here and help me!

    “Carrie”, Small Business owner
    Hired ComSec for Cyber TSCM Services in 2014
  • Hired ComSec for Cyber TSCM Services in 2014

    “William”, Fortune 500 Corporation

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