Senior Network Engineer

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CRH’s Oldcastle Infrastructure is seeking a Senior Network Engineer to design and optimize enterprise networking across LAN, WAN, SD-WAN, wireless, cloud, and security, with a hybrid role in Sandy Springs, GA. CRH offers competitive pay and comprehensive benefits. The ideal candidate brings deep Cisco and Palo Alto expertise, CCNP or higher, PCNSE, and hands-on experience with Catalyst, Nexus, ACI, BGP/OSPF, SD-WAN, plus strong Python and Ansible automation. You’ll lead multi-site deployments, architect cloud connectivity (AWS/Azure), bolster security, mentor engineers, and drive standards and tooling. Requirements include 7+ years of enterprise networking, 3+ years cloud connectivity, IT/OT exposure, and excellent communication. Tips: tailor your resume to measurable outcomes in cloud, automation, and cross-functional work; cite Job ID 520179; apply online and highlight leadership and collaboration.

Job ID:  520179

Exempt

Oldcastle Infrastructure™, a CRH company, is the leading provider of utility infrastructure solutions for the water, energy, and communications markets throughout North America. We’re more than just a manufacturer of precast concrete, polymer concrete, or plastic products. We’re a trusted and strategic partner to engineers, contractors, distributors, specifiers, and more. With our network of more than 80 manufacturing facilities and more than 4,000 employees, we’re leading the industry with innovation and a safety-first mindset.

Oldcastle Infrastructure - Built For Life from Oldcastle Infrastructure on Vimeo.

Job Summary

The Senior Network Engineer leads the design, architecture, and optimization of enterprise network solutions. This role functions as a technical authority across LAN, WAN, SD-WAN, wireless, cloud, and security platforms. The ideal candidate brings deep expertise with Cisco and Palo Alto technologies, advanced routing and security practices, cloud networking architecture, and strong automation skills. This position drives strategy, leads complex deployments, and mentors junior engineers.

Job Location

• This role will work hybrid out of our office in the Sandy Springs, GA area. 

Job Responsibilities

• Architect, design, and deploy secure, scalable LAN, WAN, SD-WAN, and wireless solutions across distributed enterprise environments.
• Lead initiatives involving Cisco Catalyst & Nexus switching, Cisco ACI, Palo Alto firewalls, and multi-site SD-WAN architectures.
• Design, implement, and optimize cloud network connectivity across AWS and/or Azure, including hybrid architectures.
• Serve as final-tier escalation for complex or high-impact network issues, ensuring rapid resolution.
• Perform performance tuning, hardening, HA design, and network reliability improvements.
• Create detailed network diagrams, baselines, standards, and operating procedures.
• Develop and implement automation strategies using Ansible and Python.
• Collaborate with security, infrastructure, and operations teams to enhance network posture and enforce cross-platform security controls.
• Lead lifecycle refreshes, platform.migrations, and modernization initiatives.
• Mentor Network Engineers and contribute to technical roadmap planning.
• Design, deploy and support secure LAN, WAN, SD-WAN and Wireless solutions across multiple locations.

Job Requirements

• Bachelor's degree in computer science, engineering, information systems, business administration or related field is required
• 7+ years of hands-on experience supporting and designing enterprise network environments.
• 3+ years of experience designing and maintaining connectivity into AWS and/or Azure.
• Cisco CCNP or higher (or equivalent experience).
• Palo Alto PCNSE or equivalent experience.
• Advanced expertise with Cisco ACI, Catalyst, Nexus switching, BGP/OSPF routing design, Meraki wireless, Palo Alto NGFW, and SD-WAN platforms (VeloCloud and Palo Alto preferred).
• Strong scripting and automation experience with Python and Ansible.
• Experience with IT/OT integration, industrial control systems (ICS), or MES platforms.
• Strong skills in relationship building among business stakeholders & colleagues.
• Strong verbal and written communication skills, able to adapt communication and key messages to the
  audience.
• Excellent documentation skills are required, including requirements, functional design or configuration, test scripts, and process flows.
• Thorough understanding of IT processes
• General understanding of project management
• Insightful and analytical contributor who provides valuable observations.
• Problem solver with the ability to break down complex situations and provide solutions.
• Proactive contributor who can work in a fast-paced, growing, and dynamic environment.
• Advanced analytical, diagnostic, and technical skills.

What CRH Offers You

• Highly competitive base pay
• Comprehensive medical, dental and disability benefits programs
• Group retirement savings program
• Health and wellness programs
• An inclusive culture that values opportunity for growth, development, and internal promotion

About CRH

CRH has a long and proud heritage. We are a collection of hundreds of family businesses, regional companies and large enterprises that together form the CRH family. CRH operates in a decentralized, diversified structure that allows you to work in a small company environment while having the career opportunities of a large international organization.

If you’re up for a rewarding challenge, we invite you to take the first step and apply today! Once you click apply now, you will be brought to our official employment application. Please complete your online profile and it will be sent to the hiring manager. Our system allows you to view and track your status 24 hours a day. Thank you for your interest!

Oldcastle Infrastructure, a CRH Company, is an Affirmative Action and Equal Opportunity Employer.

EOE/Vet/Disability

CRH is an equal opportunity employer.  All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, status as a protected veteran or any other characteristic protected under applicable federal, state, or local law.