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3Si Jobs (NOW HIRING)

3Si Security Systems

CAD Technician I

Jefferson City, MO · On-site

$45K - $52K/yr

Description At 3Si, our mission is to make your world, safer. As a global leader in innovative security technology, we help businesses and law enforcement prevent and respond to crime through field ...

Citizens

Phys Sec Command Ctr Analyst

Riverside, RI · On-site

$28/hr

Monitoring 3rd Party emergency alert notification systems (i.e., NC4, 3SI and SOS Travel Tracker). * Supporting administrative tasks required to meet audit, regulatory, and internal procedure ...

Citizens

Phys Sec Command Ctr Analyst

Johnston, RI · On-site

$28/hr

Monitoring 3rd Party emergency alert notification systems (i.e., NC4, 3SI and SOS Travel Tracker). * Supporting administrative tasks required to meet audit, regulatory, and internal procedure ...

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How much do 3si jobs pay per hour?

As of Jul 30, 2026, the average hourly pay for 3si in the United States is $26.34, according to ZipRecruiter salary data. Most workers in this role earn between $15.14 and $30.77 per hour, depending on experience, location, and employer.

What types of projects are 3Si professionals typically involved in, and how does this impact their daily collaboration with other departments?

3Si professionals are often engaged in projects related to safety services, risk management, and compliance within high-risk industries such as energy, maritime, or construction. Their work frequently requires close collaboration with operations, engineering, and HSE (Health, Safety, and Environment) teams to ensure safety protocols and emergency response plans are up-to-date and effective. Daily responsibilities may include conducting safety audits, facilitating training sessions, and analyzing incident data to improve processes. As these roles are highly cross-functional, strong communication and teamwork skills are essential for success and for driving continuous improvement in workplace safety.

What is the difference between 3Si vs Data Analyst?

Aspect3SiData Analyst
Required CredentialsTypically requires a degree in IT, computer science, or related fields; certifications like CompTIA Security+ or Cisco CCNA are commonUsually requires a degree in statistics, mathematics, or related fields; certifications like Microsoft Data Analyst Associate or Tableau Desktop Specialist are common
Work EnvironmentPrimarily in IT departments, focusing on security, network infrastructure, and system managementPrimarily in business or corporate settings, focusing on data interpretation, reporting, and visualization
Employer & Industry UsageUsed in tech, cybersecurity, and network management industriesUsed across finance, marketing, healthcare, and other data-driven industries

While both roles involve technical skills, 3Si professionals focus on IT security and infrastructure, whereas Data Analysts specialize in interpreting data to support business decisions. The choice depends on your interest in cybersecurity versus data insights.

What are the key skills and qualifications needed to thrive as a 3Si (Third-Party Security Investigator), and why are they important?

To thrive as a Third-Party Security Investigator (3Si), you need a strong foundation in cybersecurity principles, risk assessment, and investigative techniques, typically supported by a degree in information security or a related field. Familiarity with security analysis tools, vulnerability assessment platforms, and certifications such as CISSP or CISA are commonly required. Attention to detail, analytical thinking, and effective communication set top performers apart in this role. These skills are vital for accurately identifying security risks, ensuring compliance, and supporting organizational data protection.

What are 3Si jobs?

3Si is not a widely recognized job title or industry term. It could refer to a company name, an abbreviation, or a specialized role within a specific organization. If you are seeking information about roles at a company called 3Si or a position with a similar abbreviation, it's best to consult the company's official website or job postings for specific job descriptions and requirements. If you provide more context, I can help clarify the nature of the position.
More about 3Si jobs
What job categories do people searching 3Si jobs look for? The top searched job categories for 3Si jobs are:
3Si jobs near you
Infographic showing various 3Si job openings in the United States as of July 2026, with employment types broken down into 100% Full Time. Highlights an 80% In-person, and 20% Remote job distribution, with an average salary of $54,791 per year, or $26.3 per hour.

Mechanical Engineer

3Si Security Systems

Jefferson City, MO • On-site

Full-time

Medical, Dental, Vision, Life, Retirement

Re-posted 19 days ago

Job description

At 3Si, our mission is to make your world, safer. As a global leader in innovative security technology, we help businesses and law enforcement prevent and respond to crime through field-proven solutions and trusted partnerships. With over 100+ years of combined experience through our merged companies, our expertise drives measurable impact in communities worldwide.

We specialize in GPS tracking, video surveillance, and integrated response technologies that deter theft and accelerate criminal apprehension. Designed for retail, financial institutions, law enforcement, and more, our solutions combine cutting-edge tools with unmatched response capabilities. Through our exclusive DirectToDispatch™ technology, verified crime alerts are sent directly to law enforcement dispatch centers in real time—bypassing traditional third-party monitoring delays—to enable rapid, precise response when it matters most.

At 3Si, meaningful work makes a difference. We’re a purpose-driven team that values innovation, trust, and collaboration. From engineering to sales and support, every role contributes to our mission to protect communities and make the world safer. We offer a hybrid, flexible work culture, competitive benefits, and the chance to grow alongside a team of passionate, dedicated professionals.

Join us—and be part of something that matters. We are looking for a skilled and detail-oriented Mechanical Engineer to join our innovative engineering team in Jefferson City, MO. This role is responsible for the design and development of production-ready components and assemblies, with a strong emphasis on injection molding processes. The ideal candidate will have hands-on experience designing parts for high-volume manufacturing, including knowledge of DFM (Design for Manufacturability), tooling constraints, and material selection. This position plays a critical role in taking products from concept through production, ensuring designs are optimized for cost, quality, and manufacturability. You will collaborate closely with cross-functional teams including electrical engineers, project managers, manufacturing personnel, and tooling vendors to ensure seamless integration and execution of designs.

Primary Responsibilities

  • Design and develop components and assemblies, ensuring compliance with industry standards and project specifications.
  • Collaborate with cross-functional teams, including manufacturing, quality, and sales, to integrate design concepts and functional requirements.
  • Utilize SolidWorks for design creation and modification, ensuring accuracy and adherence to project timelines.
  • Prepare detailed technical drawings and specifications for manufacturing and assembly.
  • Conduct testing and analysis of mechanical systems, interpreting results to optimize design.
  • Participate in design reviews and provide technical support throughout the product lifecycle.
  • Stay current with industry trends, materials, and emerging technologies in mechanical engineering.

Knowledge, Skills, and Abilities

  • Strong understanding of injection molding and/or die casting processes, materials, and tooling.
  • Ability to manage multiple projects simultaneously, meeting tight deadlines.
  • Strong communication and teamwork skills, with the ability to collaborate effectively in a team environment.
  • Knowledge of industry standards and mechanical engineering best practices.

Qualifications

  • Bachelor’s degree in Mechanical Engineering or a related field required.
  • 3+ years of experience in product design, with emphasis on injection molding processes.
  • Strong proficiency in CAD software (e.g., SolidWorks).

Additional Comments

  • Position will be based in Jefferson City, MO.
  • Less than 5% of travel.
  • Comprehensive benefits package including medical, dental, vision, life insurance, short- and long-term disability starting on your first day
  • 401(k) retirement savings plan with company match