Careers At Security Instrument

Start A Career That Makes A Real Difference.

You hear it on the news every day.

  • Crime in our neighborhoods, schools, places of work.
  • Families broken after invasion.
  • Businesses shut down after losses.

The list goes on. Cutting edge security technology is making it possible to deter violence and in many cases, save lives. Security Instrument is always hiring bright, motivated and forward thinking individuals to fill critical positions in sales, installation, service, and administrative positions.

Submit your resume today. SI is a leading, local security provider in an $80 billion a year growth industry.

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Personal & Professional Growth

We offer competitive compensation and comprehensive benefits packages that include:

  • Medical plans
  • Vision coverage
  • Dental plans
  • 401(k) Profit sharing plan
  • Paid life insurance
  • Voluntary life insurance
  • Paid Time Off (PTO)
  • Holiday pay

Sell & Install Cutting Edge Technology

We realize that our reputation and success is directly linked to the quality of equipment, service and support that we provide.  Security Instrument has maintained a controlled growth strategy that has allowed us to consistently provide unparalleled service in the most effective and efficient way possible.

Who We Serve

Our clientele is diverse and includes homes, small retail, jewelry stores, education, financial, chemical, pharmaceutical, precious metals, manufacturing, and more. SI continues to maintain its industry leadership position with a wide-range of technologically advanced products and services, delivering  comprehensive solutions covering all aspects of security and life safety requirements.

About Security Instrument

The power of personalized service. Protecting what matters since 1960.


Founded in 1960, Security Instrument Corporation, a privately held U.S. Corporation, provides electronic security and life safety detection  and associated monitoring and support services.


Security Instrument offers an full line of services from professionally engineered system designs and turnkey installation services, to 24 hour system monitoring.

Service Area

Security Instrument is Delaware’s largest full-service independently-owned security company, serving thousands of customers throughout Delaware, MD, NJ & PA.