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Sr. Network Engineer

Day & Zimmermann
Philadelphia, PA Full Time
POSTED ON 1/8/2026
AVAILABLE BEFORE 2/6/2026
About Day And Zimmermann

When you’ve been around for more than a century, you know a thing or two! At Day & Zimmermann, we take our lifetime of experience and make things better! Our 37,000 employees help bring big ideas to life every day. We’re pushing the boundaries of innovation in construction & engineering, operations & maintenance, staffing, and security & defense. And that’s not all. Did we mention that we have 900 worldwide locations with $3 billion USD in annual revenue? Come join our in on purpose – We put people to work, we protect American freedoms, and we help our customers power and improve the world. We do what we say.® http://www.dayzim.com

Job Summary

We are searching for a Sr Network Engineer to join our team - this is a hybrid role, going onsite to Philadelphia, King of Prussia, or Marlton, NJ, based on your closest location. The Sr Network Engineer will be the primary person responsible for the planning and engineering of an organization's networking and communications infrastructure. Role includes the implementation and design of hardware and software. Responsible for the security, performance, availability, and recoverability of the corporation's networking and communications infrastructure, especially concerning network devices, network software, communications provider services, and all data connectivity. May direct the work of others.

Responsibilities

Independently troubleshoot and resolve technical issues concerning remote access solutions including Cisco ASA Firewalls, F5 BigIP load-balancers, Network Access Control (NAC), VPN server and client components as well as wireless networks – 25%

Actively participate in the architectural design and implementation of systems, infrastructure and related networking and communications hardware for the enterprise – 35%

Ability to provide expert level support all IT network and communications hardware and software infrastructure for the corporation. Develop and document procedures for routine operations including troubleshooting, support, and administration. May direct the work of others. – 10%

Analyzes network, server, and storage systems and recommends upgrades/changes; Provide testing and performance analysis of network systems to eliminate problems and make improvements. – 10%

Perform system upgrades and incorporate new technologies to the infrastructure minimizing effects on the user experience, working nights and weekends as necessary. Maintain system/network performance by performing network monitoring and analysis, and performance tuning; troubleshooting network problems; escalating problems to vendor. – 10%

Coordinate wiring and equipment installations at remote sites using various data communication vendors and remote site staff. Research, select, and coordinate the best data broadband or IP data communications options for remote office and corporate connectivity – 10%

KSAs (Knowledge, Skills, And Abilities)

10 years of industry experience in installation, configuration and support of networking communications hardware and software. Extremely strong experience with Cisco firewalls, routers, and switches required. Experience with F5, Cloud Networking and other vendor networking and communications equipment strongly preferred.

Strong expertise in installation, configuration, and troubleshooting LAN/WAN devices, network security appliances, and all data networking communications. Familiarity with VOIP technologies and related solutions preferred.

Strong abilities and expertise in independent support of Cisco switches, routers, access devices, and related communications protocols, especially TCPIP and WAN communications.

Experience leading project independently and as part of a team, including reporting information to management and coordination of events and completion of documentation. Relies on experience and judgment to plan and accomplish goals.

Ability to work in a multi-tasked environment prioritize and execute tasks in a highly dynamic environment. Knowledge of industry standard and innovative technology solutions and techniques to intelligently manage and support the infrastructure.

Minimum Qualifications

Minimum Education: Bachelor’s Degree in Arts/Sciences (BA/BS) in a related field – Required

Minimum Work Experience: 10 years – Required

Licenses and Certifications: Cisco, Microsoft Azure, F5 and other security, networking and communications certifications – Preferred

Essential Functions

Pushing or pulling (e.g., using a part of your body to press against something in a downward or outward direction or in a dragging or hauling motion)

Ability to write complex documents in English

Ability to read complex documents in English

Compensation And Benefits

In compliance with this state’s pay transparency laws, the salary range for this role is $118,000 - $191,750 . This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. (The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements).

We care about our employees and it shows.  Our staff receive a competitive salary and a comprehensive benefits package which includes medical/Rx, dental and vision coverage; life, AD&D and disability insurance; flexible spending accounts; 100% paid maternity leave for up to 12 weeks, parental leave, family leave, other paid time off; voluntary benefits and discount programs to meet our employees’ individual needs including pet insurance for our furry family members!

Diversity, Inclusion & Equal Employment Opportunity

Day & Zimmermann is committed to maintaining an inclusive workforce, where employees are hired, retained, compensated and promoted based on their contributions to our Company. Our collective strength is rooted in over a century of diverse employees and businesses, commitment to success, and delivery on promises made. Federal and state Equal Employment Opportunity laws prohibit employment discrimination based on race, color, religion, sex, sexual orientation, age, national origin, citizenship status, veteran status and disability status. Day & Zimmermann is committed to providing an equal opportunity work environment in full compliance with these laws. If you are an individual with a disability and you require an accommodation in the application process, please email reasonableaccommodation@dayzim.com, and please specify which position you are interested in, including job title and location.

Salary : $118,000 - $191,750

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