Telecommunications Network Engineer 3 (Active TS/SCI Clearance with a Full Scope Polygraph is Required)

J&T Business Consulting; New York (NY); On-site; USD 161,000 - 183,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with employer match

Paid time off and holidays

Tuition reimbursement

Parental leave

Job summary

J&T Business Consulting in Columbia, United States, seeks a Telecommunications Network Engineer 3 with active TS/SCI clearance with polygraph. The role covers design, deployment, and maintenance of enterprise-scale WAN/LAN networks, data center interconnects, and security architectures. A DoD 8570 IAT II baseline is required, with Level III within 12 months.

CCIE or higher is required. The position demands 12 years of experience and a engineering degree; substitution for 16 total years of

Qualifications

• 12 years of experience on programs of similar scope and complexity.
• Bachelor's degree in engineering; substitution available (16 years total).
• Active TS/SCI clearance with Polygraph required.
• DoD 8570 Baseline: IAT Level II; must obtain Level III within 12 months.
• CCIE or equivalent certification required.

Responsibilities

• Facilitate high-speed, scalable WAN/LAN topologies and minimize latency.
• Design, configure, deploy, test and maintain network devices and VPNs.
• Validate dataflows and coordinate interconnects between data centers and security boundaries.
• Lead large projects, collaborate with systems engineers and customers.
• Perform security testing and design evaluations for system integrity.
• Optimize end-to-end performance and document configurations and guidelines.

Skills

TS/SCI clearance with polygraph

12 years of network engineering

Education

Bachelor's degree in engineering

4 additional years experience substitution

Tools

CCIE or higher

Job description

Telecommunications Network Engineer 3 (Active TS/SCI Clearance with a Full Scope Polygraph is Required)

Columbia, United States | Posted on 11/12/2026

Clearance Level Required: TS/SCI with Polygraph

Position Overview

The Level 3 Telecommunications Network Engineer performs complex engineering services to support all aspects of network management—from initial design and implementation to ongoing maintenance, sustainment, and troubleshooting of enterprise-level network infrastructures.

In this role, you will implement and sustain Wide Area Networks (WANs), wired and wireless Campus Area Networks (CANs), Data Center Networks/Interfaces (DCN/DCI), Network Security (NETSEC) architectures, and Tactical/Deployable Networking Systems. You will analyze design specifications, implement communication system requirements across distributed environments, evaluate network characteristics (e. g., traffic connect time, transmission speeds, packet sizes, throughput), and optimize network performance.

Key Responsibilities

Topologies & Performance: Facilitate the implementation of high-speed, scalable, fault-tolerant network topologies for WAN and LAN environments; minimize network latency and maximize data throughput.

Routing & Architecture: Design, integrate, configure, deploy, test, and maintain network devices, interfaces, and technologies, including VPN, VRF, VSS, BGP, OSPF, and VLAN.

Dataflow & Interconnects: Validate dataflows/formats, coordinate with dataflow organizations and end-customer recipients, and employ government standards to configure interconnects between data centers, networks, and security boundaries.

Cross-Functional Leadership: Lead large-scale projects with dynamic requirements; collaborate with systems engineers, customers, and cross-organizational teams to refine requirements and evaluate potential system-wide impacts.

Security & Compliance: Perform security testing and design evaluations to ensure system integrity.

System Optimization: Optimize end-to-end performance (capacity, margins, data quality) and configure networks to connect front-end and back-end components seamlessly.

Documentation: Draft technical requirements, configuration management guidelines, and planning documentation.

Required Qualifications

Experience & Education

Experience: 12 years of experience on programs and contracts of similar scope, type, and complexity.

Education: Bachelor's degree in engineering from an accredited college or university.

Substitution: 4 additional years of network engineering experience (16 years total) may be substituted for a Bachelor’s degree.

Security Clearance

Active TS/SCI clearance with an active Polygraph is required.

Certifications

DoD 8570 Baseline: Active DoD 8570.01-M IAT Level II baseline certification required upon hire (must obtain IAT Level III within 12 months).

Technical Certification:CCIE (Cisco Certified Internetwork Expert) or higher/equivalent certification required.

Estimated Compensation & Benefits Overview

Target Salary Range: $161, 000 – $183, 000 (Base compensation depends on candidate experience, skills, education, and contractual requirements).

Benefits Package: Comprehensive medical, dental, and vision insurance; basic life & disability coverage; 401(k) with employer match; paid time off (PTO) & paid holidays; paid parental leave; and tuition reimbursement.