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Added 21 hours ago
Senior Program Manager (On Site)
GD Information Technology, Inc.
United States
The Program Manager leads overall execution of a large DoW Defensive Cyber Program as the enterprise orchestrator's senior point of accountability. This role owns integrated scheduling,…
Added 23 hours ago
Chief Engineer
Booz Allen Hamilton_United States
Reston, VA · McLean, VA
We are seeking a Chief Engineer to serve as the senior technical authority and platform modernization lead for a large-scale, mission-critical defensive security engineering program. This…
Added 1 day ago
Incident Response Analyst II
Western Governors University
Salt Lake City, UT · Raleigh, NC
This role has a strong incident response and security operations focus, with opportunities to apply expertise across digital forensics, intrusion detection, continuous monitoring, cloud…
Added 1 day ago
MT
Senior Program Manager
Modern Technology Solutions Inc
Colorado Springs, CO · Colorado Springs
- $165,000 to $200,000 USD / year
Modern Technology Solutions, Inc. (MTSI) is searching for a Senior Program Manager to be the PMO Lead of a key program supporting the United States Space Force (USSF) in developing and…
Added 1 day ago
Intelligence Research Specialist
Department Of Energy
Washington, DC
…and U.S. energy missions; represents DOE-IN in interagency/technical forums to align threat priorities; delivers written assessments and executive briefings for decision-makers; and…
Added 1 day ago
CO
Utilities Locator/ Inspector (Career Path)
City of Boynton Beach
Boynton Beach, FL
- $22.84 to $41.93 USD / hour
…the location of supplies, departmental policies, and to the technical aspects of the work…
Added 1 day ago
AC
AI Cyber Security Subject Matter Expert
Argo Cyber Systems
Arlington, VA
- $140,000 to $160,000 USD / year
Argo Cyber Systems is seeking an experienced AI Security Subject Matter Expert (SME) to support a mission-critical U.S. Government cybersecurity program focused on defending federal…
Added 1 day ago
OC
Lieutenant - Corrections (Florida State Certified ONLY)
Osceola County
Kissimmee, FL
- $39.96 USD / hour
…training (i.e. National Jail Leadership Command Academy, Florida Senior Leadership Program, Valencia Public Safety Leadership Program) or the ability to successfully complete a criminal…
Added 2 days ago
CH
Data Platform Engineer III (HEDIS Support)
Cambia Health Solutions
Boise, ID · Salt Lake City, UT · Little Rock, AR · Renton, WA · Medford, OR · Portland, OR · Lewiston, ID · Spokane, WA · Burlington, WA · Fargo, ND · Vancouver, WA
- $100,000 to $151,000 USD / year
Familiarity with defensive programming, OWASP top 10 to mitigate injection vulnerabilities, cross-site scripting (XSS), server side request forgery (SSRF). Familiar with authentication…
Added 3 days ago
VP, Threat Response & Global SOC Operations
N-able
Morrisville, NC · Burlington, MA
…science-driven detection, AI adoption within SOC workflows, SOC technical architecture, and SOC program management. The VP will oversee the Senior Director of SOC Operations, who runs the…
Added 3 days ago
Customer Finance Lead
Parsons Corporation
Linthicum, MD
The Customer Finance Lead will help customer leadership and program managers understand financial status, forecast future needs, monitor expenditures, and make informed resource-allocation…
Added 3 days ago
MT
Senior Project Mananger/Government Acquisitions Analyst
Modern Technology Solutions Inc
El Segundo, CA · El Segundo
- $160,000 to $190,000 USD / year
This role focuses on serving as the Senior Project Manager and Government Acquisitions Analyst, acting as the primary focal point and liaison between the DCO-S Program Office and Space…
Added 4 days ago
Junior Technical Support Admin / Techs (MCTP)
Federal Sherpa
Fort Leavenworth, KS
Federal Sherpa is uniquely positioned to support the United States Army's Mission Command Training Program (MCTP) at Fort Leavenworth, KS by delivering strategic program and project…
Added 4 days ago
Technical Cyber Lead Senior Manager
Accenture Federal Services
Washington, DC · Arlington, VA
AFS is seeking a dynamic and experienced Technical Cyber Lead Senior Manager in the field of Operational Cyber to lead and oversee our advanced cybersecurity initiatives with the Department…
Added 4 days ago
Senior Manager, Adversary Research
Arctic Wolf Networks, Inc.
Remote, United States
The Senior Manager, Adversary Research leads a team responsible for discovering, tracking, and explaining sophisticated cyber threats. This leader will define the team’s research strategy,…
Added 5 days ago
Senior Manager – Cybersecurity Operations
Castelion Corporation
Torrance, CA · Torance, CA
We are seeking an experienced Senior Manager – Cybersecurity Operations to join our cybersecurity operations team at Castelion. This critical role will lead defensive security operations,…
Added 5 days ago
Senior Network Engineer
Castalia Systems
Largo, FL
Castalia Systems is seeking a Senior Network Engineer for a position in Largo, Florida. Due to the applicable duties, this position requires 100% onsite employee status. The Network…
Added 7 days ago
Senior Cyber Security Manager
ODYSSEY SYSTEMS CONSULTING GROUP
Dayton, OH
Added 8 days ago
SO
CDOC - Liaison IV (Strategic Planner)
State of Colorado
Colorado Springs, CO
- $6,022 to $9,636 USD / month
Wellness program, tuition reimbursement, training opportunities and more;
Added 8 days ago
TA
Senior Cybersecurity and Space Vehicle Defense Mission Engineer
The Aerospace Corpor
Colorado Springs, CO
- $166,400 to $249,600 USD / year
Proven leadership experience as a technical authority, project engineer, program lead, or senior individual contributor driving complex technical efforts and advising senior government…
Added 9 days ago
Zero Trust Future-State Architect STA (Expert)
Pueo Business Solutions LLC
Mc Lean, VA
Serve as the senior technical advisor and implementation lead supporting the CIO’s Zero Trust program.
Added 9 days ago
Senior Cybersecurity and Space Vehicle Defense Mission Engineer
The Aerospace Corporation
Colorado Springs, CO
Proven leadership experience as a technical authority, project engineer, program lead, or senior individual contributor driving complex technical efforts and advising senior government…
Added 9 days ago
Program Quality Engineer Lead
Leidos
Adelphi, MD
This is an opportunity to lead Quality Engineering and Mission Assurance for a complex, mission-critical cyber program supporting the U.S. Army and Department of Defense. As the program's…
Added 9 days ago
Sr. Cyber Defense Specialist (Hybrid)
Selective Insurance Company of America
Short Hills, NJ · Hartford, CT · Charlotte, NC
The ITS Cyber Defense Senior Specialist is a senior individual contributor and subject matter expert who strengthens the organization’s cyber defense posture through a blend of Security…
Added 10 days ago
Program Integration & Execution Lead
Leidos
Adelphi, MD
Leidos is seeking a Program Integration & Execution Lead to support the C5ISR Center Cyber Security Service Provider (CSSP) - a mission-critical defensive cyber operations organization…

Castalia Systems

Senior Network Engineer

Largo, FL, United States

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Job details

Experience: In absence of a degree, 6 years of relevant experience is required
Posting language: English
Posted: Aug 10, 2026

Original job description

Job Type: Full- Time

Workplace Type: Onsite

Clearance: TS/SCI

Must be a U.S. Citizen

Benefits: Medical, dental, and vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too.

Job Summary

Castalia Systems is seeking a Senior Network Engineer for a position in Largo, Florida. Due to the applicable duties, this position requires 100% onsite employee status. The Network Engineer position implements network security and information assurance solutions for program and development systems based upon system level requirements, architecture models, and engineering design documents using a defense-in-depth approach on trusted products. This position will involve maintenance, installation, testing, and general support for network infrastructure. The ability and know-how to do basic/advanced troubleshooting, including testing during and after implementation. A solid understating of networking fundamentals is required, and how these fundamental technologies are used in a LAN, MAN or WAN architecture.

Roles and Responsibilities

A qualified candidate will perform the following duties and responsibilities, but are not limited to:

Configure, administer, and maintain Cisco Unified Communications Manager (CUCM) clusters supporting enterprise and classified environments.
Manage and maintain Cisco Unity Connection voicemail systems, including user provisioning, call handlers, automated attendants, and voicemail integrations.
Configure and support dial plans, route patterns, route groups, route lists, SIP trunks, device pools, partitions, and calling search spaces.
Administer and troubleshoot voice gateways, session border controllers, and VoIP infrastructure.
Provide Tier III technical support, troubleshooting complex voice, call routing, registration, signaling, and voice quality issues.
Design, implement, and maintain hunt pilots, hunt lists, line groups, call queuing, and call coverage solutions to optimize call distribution and operational workflows.
Configure, manage, and support Meet-Me conferencing services, conference bridge resources, and collaboration platforms.
Plan, coordinate, and execute CUCM and Unity Connection upgrades, patches, and lifecycle management activities.
Develop upgrade runbooks, rollback procedures, testing plans, and maintenance schedules to ensure successful system implementations.
Deploy, configure, and integrate UniFi FX solutions within enterprise communications environment.
Support migration planning, testing, validation, and production cutover activities for voice and collaboration modernization initiatives.
Implement and maintain DISA Security Technical Implementation Guide (STIG) compliance for Cisco Unified Communications platforms and associated virtual appliances.
Perform vulnerability remediation, security hardening, compliance validation, and support cybersecurity audits, inspections, and accreditation activities.
Maintain secure communications environments in accordance with DoD, organizational, and cybersecurity requirements.
Develop and maintain engineering diagrams, configuration standards, operational procedures, disaster recovery plans, and technical documentation.
Create, document, and defend system change requests while ensuring configuration management compliance.
Conduct root cause analysis, incident response activities, and corrective actions to improve system reliability and performance.
Collaborate with cybersecurity, network, infrastructure, and business stakeholders to implement and support enterprise communication services.
Gather, analyze, and report system performance metrics to support operational readiness, capacity planning, and continuous improvement initiatives.
Provide technical guidance and mentorship to junior engineers and support personnel.
Contribute to strategic modernization efforts and the design, architecture, and enhancement of enterprise voice and collaboration platforms.

Required Qualifications:

Bachelor’s degree and 12 months of relevant professional work experience (excluding internships)
In absence of a degree, 6 years of relevant experience is required
Must be able to attain and maintain a DoD 8570 IAT Level II certification (Security+ or CISSP preferred).
A strong understanding and knowledge of computer, network, and security systems.
Good interpersonal and communication skills.
Strong analytical, critical thinking, and problem-solving skills.
Ability to work well independently under limited oversight, be self-directed and able to prioritize work.

Preferred Qualifications:

Experience with Juniper SRX, EX series routers and switches.
Experience deploying security solutions for DoD networks.
Experience with multi-platforms like Windows, UNIX, LINUX
Understanding of network engineering fundamentals, including: OSI layers, IP addressing, sub-netting, TCP/IP stack, VLANs, DHCP, etc.
Willingness to learn new technologies and applications as required.
Demonstrated experience implementing computer security.
Ability to adapt both an offensive and defensive mindset to support securing information systems.
Ability to quickly switch tasks based on changing priorities.
Strong writing, speaking and interpersonal skills, along with the ability to take initiative and work independently without supervision.
Ability to work with an extremely risk adverse customer and their policies.

Physical Requirements/Work Environment

Normal Office environment

Travel

As needed

Company Description

Castalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application.

With our vast knowledge of our customers’ needs and relevant technology, our team is able to bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it’s so evident when you compare us with anyone.

Disclaimer

Castalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct.

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More about this job

Skills

Troubleshooting
LAN
WAN
Unity
SIP
Troubleshoot
Technical support
Call routing
Collaboration
Regulatory compliance
Cybersecurity
Inspection
Implement ICT recovery system
Documentation
Root cause analysis
Incident response
Communication skills
Process improvement
Security+
CISSP
Building systems monitoring technology
Critical thinking
Problem solving
Microsoft Windows
UNIX
Linux
DHCP
Interpersonal skills
Work independently

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