Full-Time

Senior Associate

Info Sec Sys Engineer

Posted on 9/24/2025

L3Harris Technologies

L3Harris Technologies

10,001+ employees

Defense technology solutions for national security

No salary listed

Melbourne, FL, USA

In Person

This position is onsite at L3Harris offices located in Melbourne, Florida.

US Top Secret Clearance Required

Category
IT & Security (1)
Required Skills
TCP/IP
Python
Perl
Splunk
Linux/Unix
Requirements
  • A Bachelor’s degree in Computer Engineering, Computer Science, IT Security, or a related field with at least 2 years of relevant experience; or a Graduate degree in the same fields and a minimum of 0-2 years of relevant experience. In lieu of a degree, a minimum of 6 years of prior relevant experience
  • At least 2 years of experience in network security engineering, including the specification, selection, evaluation, testing, deployment, and operation of security devices and applications such as ArcSight, Splunk, LogRhythm, Exabeam, and other similar SIEM technologies
  • 1 - 2 years of Security Operations (Analyst, Forensics, Threat Hunting) experience
  • Minimum of 1 years’ experience of networking background including knowledge of data flow principles and troubleshooting of complex customer issues
  • Minimum of 1 years’ experience in routing protocols, VPNs, VLANs, SPANs, trunk and access ports, TCP/IP, and the OSI model
  • Minimum of 1 years’ experience working with engineering processes including SP 800-160 Vol 1 or higher
  • 1 year of command line experience in Linux
Responsibilities
  • Operate and manage Security Information and Event Management Systems (SIEMs), including all application components on Windows and Linux servers
  • Develop and optimize content for a complex and growing SIEM infrastructure, including use cases for dashboards, channels, reports, rules, filters, trends, queries, and lists
  • Optimize data flow using aggregation and filters, and develop custom connectors and parsers (using regex) as needed to meet use case objectives
  • Manage the lifecycle of SIEM platforms, including planning and coordinating upgrades, new deployments, and maintaining current operational data flows
  • Provide technical expertise and guidance to internal teams on effective SIEM use and best practices, including presentations and live demonstrations
  • Demonstrate experience in UNIX, Linux, and Windows, including the ability to rebuild host systems and administer UNIX systems through automation scripting (Perl, Shell, Python)
  • Perform routine equipment and preventative maintenance checks
  • Apply configuration management disciplines to maintain hardware/software revisions, SIEM content, security patches, hardening, and documentation
  • Develop, maintain, and publish up-to-date technical documentation of designs and configurations in accordance with L3Harris Systems Engineering processes
  • Work closely with clients to deliver the value of a SIEM to overall business objectives
  • Install, configure, and troubleshoot security devices and general IT installations (e.g., Firewalls, IDS)
  • Create internal requirements, CONOPs, and interface control documents from customer/product requirements
  • Install and configure databases
  • Mentor junior security staff in systems engineering design, testing, and implementation of network security infrastructure and services
  • Resolve issues within the environment by coordinating with internal and external groups, supporting stakeholder meetings, and maintaining regular customer interactions to ensure effective problem resolution
  • Support other tools and applications as needed, focusing on application administration/management
Desired Qualifications
  • Strong project engineering experience in security-related environments
  • Understanding and operational experience with network security event and intrusion detection architectures
  • Experience developing, configuring, and maintaining Linux and Windows Operating Systems (OS)
  • Proficiency in system logs and log analysis
  • Familiarity with NIST SP800-53 or NIST SP800-171 control frameworks and FISMA policies
  • Ability to assist and lead teammates and work well with multi-discipline teams
  • Strong listening, written, and oral communication skills
  • Experience serving government customers in a security environment
  • Prior experience in state or federal government WAN architecture
  • Prior FAA telecommunications and network security experience
  • CompTIA Network+, Security+, Linux+ certification
  • CCNA or CISSP certification
  • Any SIEM or Security vendor certification(s)
L3Harris Technologies

L3Harris Technologies

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L3Harris Technologies provides defense and national-security technology solutions across space, air, land, sea, and cyber domains. It develops integrated systems with advanced communications, surveillance, and reconnaissance to support government agencies and defense contractors under long-term contracts. The product combines hardware, software, and services to deliver secure, interoperable, mission-critical capabilities. Its goal is to help clients strengthen operational readiness and national security through reliable, multi-domain technologies and sustained partnerships.

Company Size

10,001+

Company Stage

IPO

Headquarters

Melbourne, Florida

Founded

1895

Simplify Jobs

Simplify's Take

What believers are saying

  • Backlog doubles to $40B, providing twice revenue coverage through 2026.
  • $1.27B Virginia investment quadruples solid rocket motor production by 2031.
  • Classified space contracts reach 28% of business, targeting multi-billion growth.

What critics are saying

  • Fixed-price Artemis II contracts trigger margin erosion from cost overruns in 2027.
  • RTX captures US Army night-vision follow-ons via lobbying by Q2 2027.
  • Lockheed cuts F-35 C3ISR sourcing, slashing 15% revenue by 2028.

What makes L3Harris Technologies unique

  • L3Harris delivers end-to-end solutions across air, land, sea, space, and cyber domains.
  • Proprietary image intensifier technology leads 12.5% night-vision market share.
  • Deceptor payload enables real-time autonomous electronic warfare on UAS.

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Benefits

Health Insurance

Disability Insurance

401(k) Retirement Plan

401(k) Company Match

Paid Vacation

Paid Holidays

Mental Health Support

Relocation Assistance

Company News

Yahoo Finance
Apr 13th, 2026
L3Harris Technologies grows EPS 16% annually with $220M insider stake

L3Harris Technologies has demonstrated solid financial performance with earnings per share growing 16% annually over the past three years. The US$66 billion defence contractor reported revenue of US$22 billion, up 2.5%, whilst maintaining stable EBIT margins. Company insiders hold US$220 million worth of shares, representing 0.3% of the company. Whilst modest in percentage terms due to L3Harris's size, this stake provides alignment between management and shareholders. The company's combination of revenue growth, profit expansion and insider ownership distinguishes it from speculative, loss-making ventures. Its established track record of profitability offers investors lower risk compared to companies relying solely on growth narratives without financial substance. The article suggests L3Harris warrants consideration for investors seeking profitable, growing companies over high-risk ventures.

Yahoo Finance
Apr 9th, 2026
L3Harris up 71.8% in one year but trades at premium 42.1x P/E multiple above industry average

L3Harris Technologies has raised investor attention following recent share price movements, with the stock up 2.3% over the past week. The company has delivered strong longer-term returns, including a 71.8% one-year total shareholder return and 92.9% over three years. With revenue of $21.9 billion and net income of $1.6 billion, L3Harris is trading at $361.97. One valuation narrative suggests the stock is modestly undervalued at a fair value of $392.16, supported by expected US defence budget growth and the company's positioning in areas like missile warning and tracking. However, L3Harris' current price-to-earnings ratio of 42.1x sits above the US aerospace and defence industry average of 38.8x, suggesting potential valuation risk if market sentiment shifts.

The Associated Press
Apr 8th, 2026
Xoople and L3Harris unveil AI-optimised satellite constellation after seven years of development

Xoople, an AI data infrastructure company, and L3Harris Technologies have announced the co-development of a satellite constellation optimised for AI applications. The system, resulting from seven years of design and research, aims to deliver unprecedented precision in Earth observation data. The constellation features advanced optical and sensor design to maximise data quality, providing what Xoople calls "Earth's System of Record". The platform is designed to support AI systems shifting towards autonomous action, offering real-time monitoring with precision levels where even 1% error is unacceptable. Applications include supply chain optimisation, infrastructure management, risk underwriting, disaster response and security monitoring. CEO Fabrizio Pirondini said the system delivers the scale and precision required for AI-era decision-making across enterprises and governments.

Yahoo Finance
Apr 2nd, 2026
L3Harris powers NASA's Artemis II with over 100 mission elements, but fixed-price contracts may pressure margins

L3Harris Technologies supplied propulsion, avionics, thrusters and communications systems for NASA's Artemis II mission, the first crewed lunar journey in over 50 years. The company's involvement spans more than 100 mission elements, highlighting its capabilities in space hardware and systems integration for government programmes. Whilst the Artemis II role demonstrates L3Harris's technical breadth, analysts note it does not materially alter the near-term investment case. The company faces ongoing risks from fixed-price development contracts and potential US space budget constraints that could pressure margins. L3Harris's investment narrative projects $27 billion in revenue and $2.9 billion in earnings by 2029, requiring 7.3% annual revenue growth. Community analysts estimate fair value between $388 and $452 per share.

Yahoo Finance
Mar 23rd, 2026
Hegseth pushes $200B defence spending boost — Axon and L3Harris named top buys

US Defense Secretary Pete Hegseth plans to request $200 billion from Congress to fund operations against Iran, adding to the Pentagon's roughly $1 trillion budget for the current fiscal year. Two defence stocks well-positioned to benefit from this spending increase are Axon and L3Harris, according to Barchart. Axon, which provides law enforcement equipment including Tasers and AI-driven systems, reported 39% revenue growth to $797 million in Q4. The company's AI-powered tools are particularly relevant given recent suspected terrorist attacks in the US. L3Harris, a defence contractor selling missiles, satellites and communications products, saw 6% revenue growth to $5.6 billion last quarter, whilst cash from operations jumped 74% year-over-year. Analysts predict Axon's earnings per share will rise 13% this year and 115% in 2027.

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