Senior Network Administrator-III

Description
Expertise in designing and maintaining hybrid network architectures that securely and efficiently connect on-prem data centers with public cloud providers (e.g., Azure) and services. Good understanding of Azure networking components including VNets, Azure FW, NSGs, VPN Gateways, ExpressRoute, Application Gateways, and hub-and-spoke architecture. Strong knowledge of SD-WAN technologies and hands-on experience implementing and configuring Fortinet SD-WAN solutions to optimize connectivity across distributed environments. Proven experience leading migration efforts from legacy platforms such as Palo Alto and Cisco to Fortinet (FortiGate) and Aruba, including planning, deployment, and post-migration support. Expert-level configuration, deployment, and troubleshooting of firewalls across on-prem and cloud platforms, with emphasis on Fortinet FortiGate, Palo Alto, and Cisco. Advanced knowledge of routing protocols (BGP, OSPF, EIGRP), L2/L3 architecture, policy-based routing, and Quality of Service (QoS) in complex, multi-site environments. Strong scripting and automation skills using Python, PowerShell, Bash, and Ansible to automate network tasks and deployments. Skilled in WAN/LAN/MAN connectivity technologies including MPLS, ELAN, DIA, and LTE for site connectivity and failover. Experienced with network segmentation, Zero Trust Network Architecture, VPN/IPSec, NAT, 802.1X, and secure remote access solutions. Proven knowledge of wireless design, configuration, and troubleshooting for large enterprises and campus environments using Aruba solutions. Skilled in managing and implementing monitoring and alerting to proactively identify and address performance degradation, including tools like SolarWinds. Ability to diagnose and determine corrective actions to be taken on complex technical issues. Experience architecting and testing hybrid disaster recovery (DR) and business continuity (BCP) strategies, including cross-platform failover between on-prem and cloud networks. Proficient in planning redundancy for both physical and virtual network layers to ensure high availability and business resilience. Demonstrated expertise in leading and mentoring junior staff, providing hands-on technical guidance to resolve complex infrastructure issues efficiently and effectively. Ability to express complex technical concepts effectively, both written and verbally. Ability to manage support cases with external technology vendors. Preferred Certifications (one or more of the following): CCNP CCNA Fortinet NSE4+ Azure Networking Engineer Associate or Azure Solutions Architect Expert certification CCIE CompTIA Network + Facilitates the planning, forecasting, implementation and identification of resource requirements for network systems. Performs network planning, network architecture design and engineering activities. Supervises the administration and maintenance of global network infrastructure, providing technical guidance and mentorship to peers. Manages network problem resolution and serves as the highest point of escalation for private and public network issues. Continuously evaluates new products and emerging technologies, providing strategic recommendations that drive proactive improvements and innovation while overseeing the development and implementation of best practices.

Skills

Network engineering, Router, CCNP, Paloalto, Cisco routers, Cisco switches, fortinet, fortigate, aruba, SDWAN, SD-WAN, Bgp, MPLS, Ccna, Lan, Wan, Routing, Switches, Network architecture, Troubleshooting, Routers and switches

Top Skills Details

Network engineering,Router,CCNP,Paloalto,Cisco routers,Cisco switches,fortinet,fortigate,aruba,SDWAN,SD-WAN,Bgp,MPLS

Additional Skills & Qualifications

Qualifications and Requirements: High school diploma or equivalent required; bachelor's degree in computer science, IT, Engineering, or equivalent experience preferred. Minimum of 8 years of experience required; over 10 years preferred. 3+ years of experience in designing, implementing and managing Azure network services or equivalent public cloud experience. 1-2 years of experience working with suppliers conducting vendor evaluations, product proofs of concepts, pilots, and enterprise implementations preferred. Essential Functions: Models, promotes, reinforces, and rewards the consistent use of HOLT's Values Based Leadership (VBL) tools, models, and processes to ensure alignment with our Vision, Values, and Mission. Leads the evaluation and adoption of emerging technologies and contributes to the development of long-term strategic roadmaps aligned with business goals. Leads the development and execution of project plans, including risk assessments, mitigation strategies, and contingency planning to ensure successful delivery and operational resilience. Designs and implements monitoring, configuration management and reporting functions to support proactive, hands-off network operations. Performs advanced network and system performance tuning and leads capacity planning to ensure optimal performance and scalability. Architects and maintains complex hybrid network solutions connecting on-premises data centers with Azure and other services, ensuring high availability and security. Demonstrates advanced proficiency with static/dynamic routing protocols (BGP, OSPF, EIGRP) and policy-based routing in complex, multi-site network environments; skilled in VLAN design, spanning-tree protocol optimization, and multicast routing configuration. Applies expert understanding of core networking protocols including TCP/IP, MPLS, DNS, DHCP, SNMP, and various VPN technologies in enterprise contexts. Expertly configures, maintains, and optimizes enterprise-g

Experience Level

Expert Level
Pay and Benefits
The pay range for this position is $75000.00 - $105000.00/yr.
Health Benefit - Health insurance is offered to full-time employees.
Dental Benefit-Dental insurance is offered to full-time employees.
Vision Benefit-Vision insurance is offered to full-time employees.
Term Life and Accidental Death & Dismemberment (AD&D) Benefit-Employees are eligible for term life and AD&D insurance coverage for themselves and
eligible dependents. Coverage is offered to full-time employee at a minimal cost.
Short and Long Term Benefit- Full-time employees are eligible for this insurance which is designed to supplement a portion of income if the employee is disabled due to an illness or accident that occurs away from work.
Flexible Spending Account-A flex plan is offered to full-time employees.
401(k) and Profit Sharing Plan- HOLT contributes to a Profit Sharing Plan through annual contributions for qualified employees. In addition, employees are encouraged to participate in a 401(k) savings plan and can contribute up to 20% of their base wages tax-free.
Employee Assistance Program (EAP)-The EAP provides a confidential and professional counseling service to help individuals handle some of life's personal situations. Employees and their eligible dependents can use this resource at no cost to the employee.
Education Assistance-HOLT offers a tuition reimbursement program that full-time employees are eligible to participate in after 6 months of employment.
Vacation-Full-time employees will receive paid vacation up to a maximum of 4 weeks based on years of service.
Sick Time-All full-time employees accrue 4 hours of sick time per month up to a 6-month maximum limit.
Holidays-Employees receive 6 paid holidays plus a floating holiday.
Personal Days-Employees receive 2 days per year of personal time with pay.
Workplace Type
This is a fully onsite position in San Antonio,TX.
Application Deadline
This position is anticipated to close on Aug 22, 2025.
>About TEKsystems:
We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.