Senior Network Engineer, VoIP

An exciting career awaits you At MPC, we’re committed to being a great place to work – one that welcomes new ideas, encourages diverse perspectives, develops our people, and fosters a collaborative team environment. Position Summary The ideal candidate will possess extensive experience in Cisco Collaboration and Unified technologies and serve as a senior technical leader within the Connectivity organization. This individual will be responsible for the design, implementation, optimization, support, and strategic evolution of the enterprise voice and collaboration environment, including Cisco Unified Communications Manager (CUCM), Cisco Unified Contact Center Express (UCCX), Cisco Unity Connection, SIP-based communications platforms, and related third-party technologies. This position requires a highly collaborative professional who can effectively partner with Network Engineering, Cybersecurity, Infrastructure, Cloud, Application Development, Operations Technology (OT), and business stakeholders to deliver reliable, scalable, and secure communication services across the enterprise. The successful candidate will serve as a trusted advisor, providing technical leadership, architectural guidance, and strategic recommendations that align communication platforms with business objectives and enterprise standards. As a senior member of the engineering team, this individual will participate in architectural reviews, technology evaluations, modernization initiatives, and long-term roadmap planning. Responsibilities include developing technical designs, performing assessments, driving remediation and standardization efforts, creating and maintaining technical documentation, and leading cross-functional discussions to visualize and communicate complex concepts. The candidate must be capable of making sound technical decisions, influencing outcomes across multiple teams, and mentoring engineers through knowledge sharing and leadership. The successful candidate will operate with minimal supervision, demonstrate initiative and ownership, maintain a customer-focused mindset, and possess exceptional written and verbal communication skills. This role requires the ability to balance strategic thinking with hands-on technical execution while ensuring the stability , resilience, and continuous improvement of the enterprise collaboration environment. Key Responsibilities Deploy complex (VoIP) network configurations for on-premise or cloud-based networks and assists in the development of playbooks for network systems ( Cloud Computing ) . Assists in the integration of new systems and tools. Develops and maintains scripts to facilitate network administrative tasks and automate repetitive processes. Archi tect and engineer enterprise VoIP and Unified Communication so l utions ( e.g. Cisco Unified Communication Manager, Cisco Unified Contact Center Express (UCCX), Voice Gateway . Design complex dial plans, partitions, Calling Search Spaces (CSS), translation patterns and route patterns. Serve as a primary escalation point for complex voice network issues. Analyze packet captures and SIP signaling to resolve jitter, latency, and call routing failures. Analyze performance on the network for non-VoIP related traffic as required . ( Troubleshooting, Results Driven, Network Management System ) Monitors performance identifies areas for improvement for the (VoIP) network and implements performance tuning. Identifies trends in issues and determines the root cause to reduce future issues. Adheres to network policies, standards, and standard operating procedures for how-to documents. Undertakes the regular analysis and interpretation of traffic and utilization of services on (VoIP) network connections. Engage in discussions and participate in development of Private SaaS , Edge Computing and other advanced cloud capabilitie s ( Cloud Computing, Network Installation and Configuration, Network Transformation ) . Adheres to network policies, standards, and standard operating procedures for how-to documents. Analyzes alternative hardware, platforms, and technologies for the network infrastructure ( Network Transformation, Network Testing, Network Traffic Analysis ) . Education and Experience Bachelor's degree in Information Technology preferred , related field or equivalent experience. Five (5) or more years of relevant experience required . Cisco Certified Voice Professional ( CC V P ) or equivalent certifications preferred . E xperience in l ead ing site surveys, capacity planning, end user requirement analysis, and the physical/logical deployment of VoIP hardware and software preferred. Experience in migrating legacy TDM/PBX systems to modern VoIP architecture preferred. Experience with p lan ning and execut ion of major system upgrades, patches, firmware updates, and database replication health checks across the publisher and subscriber nodes preferred. Experience with enterprise scale data centers, network topologies and architectures preferred . Experience with RTP and Media Concepts, SDP and Codecs (G.711, G.729, Opus, DTMF), Secure Signaling (TLS/ mTLS, SRTP) preferred. Deep understanding of Routing Concepts, Switching Concepts, Quality of Service, Traffic Engineering, Filtering and Tuning ( Network Traffic Analysis, Network Testing, Network Protocols ) is highly preferred . Exposure to automation tools ( e.g. Ansible, Python Scripting) preferred. Experience with packet capture tools (Wireshark) and call analysis platforms preferred. Skills Adaptability - Maintaining effectiveness when experiencing major changes in work responsibilities or environment, such as people, processes, structure, or culture; adjusting effectively to change by exploring the benefits, trying new approaches , and collaborating with others to make the change successful. AI Fundamentals - Understanding core AI concepts and methods, applying AI to job-relevant use cases, and contributing to organizational AI reimagination. Authentic Communicator - Expresses ideas and information, both verbally and in writing, clearly and credibly. Listens to understand and fosters constructive dialogue. Change Management - A systematic approach for defining and implementing procedures or technologies to address changes in the environment. It can include adapting to change, controlling change, or effecting change. Cost Optimization - The process of analyzing, planning, and managing costs to improve cost efficiency and reduce expenses while maximizing business value. Internet of Things (IoT) - Familiarity with IoT concepts and protocols, as well as experience designing architectures that incorporate IoT devices and enable seamless connectivity and data exchange. IT Service Management (ITSM) - The processes, policies, and procedures an organization implements to design, deliver, manage, and improve the IT services it provides to customers or internal users. ITSM aligns IT service delivery with business needs and helps ensure services are delivered efficiently, effectively, and in a way that adds value to the organization. Network Administration - Organizing, installing, and supporting the organization’s computer systems, including local area networks, wide area networks, network segments, intranets, and other data communication systems. Network Automation - Automating the configuration and management of network resources in LAN and WAN environments to ensure network consistency and scalability. Network Design - Providing network design, bandwidth allocation, and IP address allocation, as well as supervising the installation, configuration, and maintenance of major network technologies. Network Engineering - The process of orchestrating network traffic and data flow across the enterprise ecosystem. Network Installations - Configuring network hardware and software components according to organizational guidelines and technical requirements. This includes implementing and configuring servers, network devices, and network management tools, as well as managing user network access to ensure stable and reliable network operations. Network Management System - The use of network monitoring to determine in real time whether a network is operating optimally and to improve the percentage of time during which the network performs its intended function. Network Security Management - The process of providing complete visibility into the network and generating data for assets, including asset groupings and classifications, firewalls, applications, ports, protocols, VPNs, NAT, security policies, and vendor devices. Network Standards - Sets and establishes rules that determine how data is transmitted between different devices on the same network. Requirements Management - The process of documenting, analyzing, tracing, prioritizing, and agreeing on requirements, then controlling changes while communicating with relevant stakeholders. Results Driven - Drives operational and process excellence and innovative behavior by empowering others, collaborating, taking appropriate risks , making timely decisions, and holding people accountable for results. Strategic Outlook - Examines issues, generates ideas, creates future scenarios, and develops plans with a long-term perspective. Ensures short-term goals support long-term strategy and that organizational or functional strategy aligns with and supports the overall business strategy. Troubleshooting - The systematic process of identifying, diagnosing, and resolving problems or faults within a system, network, or process to restore normal operations and prevent recurrence. As an energy industry leader, our career opportunities fuel personal and professional growth. Location: San Antonio, Texas Additional locations: Findlay, Ohio Job Requisition ID: 00023781 Location Address: 19100 Ridgewood Pkwy Education: Employee Group: Full time Employee Subgroup: Regular Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, reproductive health decision-making, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship or any other status protected by applicable federal, state, or local laws. If you would like more information about your EEO rights as an applicant, click here . If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at . Please specify the reasonable accommodation you are requesting, along with the job posting number in which you may be interested. A Human Resources representative will review your request and contact you to discuss a reasonable accommodation. Marathon Petroleum offers a total rewards program which includes, but is not limited to, access to health, vision, and dental insurance, paid time off, 401k matching program, paid parental leave, and educational reimbursement. Detailed benefit information is available at .The hired candidate will also be eligible for a discretionary company-sponsored annual bonus program. Equal Opportunity Employer: Veteran / Disability We will consider all qualified Applicants for employment, including those with arrest or conviction records, in a manner consistent with the requirements of applicable state and local laws. In reviewing criminal history in connection with a conditional offer of employment, Marathon will consider the key responsibilities of the role.