The Digital Modernization Sector at Leidos currently has an opening for a Senior Network Engineer supporting the HEITS Contract as part of the Department of Homeland Security (DHS) Insider Threat Program (ITP). This is an exciting opportunity to use your experience to support, sustain, design and evolve the network enterprise of the ITP. The ITP mission is to identify insider threats to the department by utilizing advanced analytics, monitoring, and data correlation which in turn help address and eliminate potential threat actors from compromising the DHS mission in safeguarding the homeland.
The selected candidate will be responsible for the following:
- Support the ITP network infrastructure, perform all routine maintenance activities, provide guidance on upgrades and system recapitalization, perform availability/capacity management.
- Oversee High Speed Guard Cross Domain solution that supports the transfer of data between multiple classification domains.
- Support all documentation to effectively capture the configuration baseline.
- Design and support system recapitalization plans to account for capacity growth and changes as directed by the customer.
- Serve as the subject matter expert on all ITP network infrastructure.
Basic Qualifications:
Bachelors degree and (8)+ years of prior relevant experience or Masters with (6)+ years of prior relevant experience
Cisco Certified Network Professional (CCNP)
Engineering, Deployment and operations of LAN and WAN Switches, and Firewalls ensuring seamless integration into existing network infrastructure
Working knowledge of defense-in-depth principles, network/HW/SW security architecture, network topology, IT device integrity, and common security elements
Installs, configures, and maintain equipment including Cisco network and FW gear Cisco 2900, 4500, 9300, 9400, 6800 and Nexus 9000, and Cisco Firepower, ASA.
Experience with and proven methods for managing the information security incident lifecycle, including incident response, mitigation, post-action reporting, and mapping a path forward.
Network Management experience with Solarwinds, or WhatsUP Gold, NetQoS, NetBrain
Cross platform familiarity and experience with VMWARE, Linux, Microsoft Server and AD.
Build firewall policy and optimized rule sets for improved efficiency and threat prevention.
Deploy new network configuration to meet NIST/FISMA/STIG compliance requirements
Support ATO reviews and Audits
Ability to obtain DHS EOD SCI
Preferred Qualifications:
Master’s degree from an accredited college or university in IT Management, Engineering, or related field
Proven experience (10+ years) in IT service delivery management
Experience with User Activity Monitoring products and platforms
Experience with Everfox High Speed Guard Platform
Experience with Cisco, Juniper LAN/WAN network infrastructure
Experience with Palo Alto Firewalls
Certified Information Systems Security Professional (CISSP)
Cisco Certified Network Professional (CCNP) - Security
Palo Alto Networks Accredited Configuration Engineer (ACE) - PAN-OS 7.0 Version
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:May 29, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
Skills Required
- Bachelors degree with 8+ years of experience or Masters with 6+ years
- Cisco Certified Network Professional (CCNP)
- Experience with LAN and WAN Switches, and Firewalls
- Knowledge of defense-in-depth principles and network security architecture
- Experience installing and maintaining Cisco network equipment
- Experience managing the information security incident lifecycle
- Network Management experience with Solarwinds or similar tools
- Cross platform experience with VMWARE, Linux, Microsoft Server
- Ability to obtain DHS EOD SCI
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
