Senior Systems Engineer-F5

Overview

As a Senior Systems Engineer you will be responsible for resolving escalated service issues, coaching other engineers to resolutions, engineering and implementing complex projects, and for maintaining and overseeing the technology of their assigned areas. This includes VMWare, Windows, and Linux environments.

We are seeking a highly skilled Senior F5 Engineer with a proven track record in enterprise-scale application delivery, load balancing, and secure traffic management. This role requires deep expertise in F5 BIG-IP LTM, iRules scripting, TLS/SSL configurations, DNS infrastructure, certificate lifecycle management, and cross-platform systems knowledge. The ideal candidate will also possess work experience with F5 APM to support future authentication initiatives.

A successful candidate will have the demonstrated ability to adapt to evolving requirements, devise innovative solutions in dynamic environments, work in high-pressure environments, collaborate effectively with diverse teams, and maintain focus on delivering secure and optimized application traffic solutions. We are looking for an individual with a Level III Engineer mindset—someone who takes ownership, operates at a strategic level, and delivers robust, scalable solutions in complex technical ecosystems. 

Responsibilities

• Works with project team to plan and engineer the organization's systems infrastructure utilizing extensive experience. Ensure that the various components of the enterprise infrastructure architecture are consistent and coherent, designed at an appropriate level of detail, and that changes are controlled so as to maintain consistency. Serve as a subject matter expert for infrastructure architectural frameworks, methods and tools.
• Perform a variety of complicated tasks such as implementation or upgrade of designed hardware and software solutions. Works both independently and coordinates the activities of System Administrators, DBA's and development teams.
• Troubleshoot performance and technical issues with systems infrastructure. Assist development team with troubleshooting application and systems performance issues. Advise on performance and monitoring tools.
• Design, implement, and maintain F5 BIG-IP systems (LTM, APM) across diverse, enterprise environments.
• Develop and maintain advanced iRules and traffic policies to support custom application logic, security enforcement, and traffic optimization.
• Configure and support F5 APM for application access control, including authentication policy design and integration with identity providers.
• Troubleshoot and resolve complex issues related to SSL/TLS handshakes, load balancing behavior, session persistence, and backend server interactions.
• Perform packet capture analysis (tcpdump, Wireshark) to diagnose network performance, latency, or connectivity issues at a deep protocol level.
• Manage all aspects of certificate lifecycle, including issuance, renewal, deployment, and chain validation across F5 systems.
• Optimize TLS configurations in alignment with current best practices (TLS 1.2/1.3, strong cipher suites, forward secrecy).
• Design and maintain DNS architectures, including split-horizon DNS, GSLB, TTL tuning, and resolution flow optimization.
• Collaborate with cross-functional teams, including system and application owners, to ensure F5 infrastructure aligns with application, security, and business requirements.
• Provide guidance and mentorship to junior engineers and act as a subject matter expert in F5 technologies.
• Support automation initiatives using scripting tools such as Python, Ansible, or shell scripting for consistency and efficiency.
• Maintain accurate documentation of configurations, standards, procedures, and troubleshooting guides.
• Participate in on-call rotations and provide support during critical incidents or planned maintenance windows.
• Completes all responsibilities as outlined on annual Performance Plan.
• Completes all special projects and other duties as assigned.
• Must be able to perform duties with or without reasonable accommodation.
• Complete all responsibilities as outlined on annual Performance Plan.

This job description is intended to describe the general nature and level of work being performed and is not to be construed as an exhaustive list of responsibilities, duties and skills required. This job description does not constitute an employment agreement and is subject to change as the needs of Cotiviti and requirements of the job change. 

Qualifications

• Bachelor’s degree in MIS, computer science, or 4+ years related work experience required.
• A blended 8+ years architecture, engineering, implementing and administering highly available web server, application server, networking and storage infrastructures required.
• Minimum 4 years of hands-on experience with F5 BIG-IP LTM in enterprise environments.
• 3+ Years of experience with Certificate management.
• Proficient in iRules (TCL), traffic manipulation techniques, and F5 CLI/tmsh.
• Strong understanding of TCP/IP networking, including SNAT, NAT, VLANs, and routing fundamentals.
• A deep working knowledge VMware, Linux, Windows, .Net, Java, SAN and databases required.
• Knowledge of one or more RDBMS required. Oracle Enterprise Database environments preferred.
• Deep expertise in TLS/SSL, including cipher suite configuration, certificate deployment, and troubleshooting.
• Proficient in DNS principles and troubleshooting, including experience with TTL management, and DNS flow.
• Experience in Hadoop and Big Data technologies preferred.
• Minimum of 3 years mentoring and directing the work of other systems administrators and/or engineers.
• Experience with packet capture tools (tcpdump, Wireshark) for detailed traffic analysis.
• Familiarity with F5 APM, including policy creation for Kerberos, SAML, and OAuth2 authentication methods.
• Working knowledge of PKI infrastructure and tools for certificate management.
• Strong experience with all major Windows Server platforms (2008–2022) and Linux distributions (RHEL, CentOS) to design F5 configurations that align with application needs.
• CCNA-level networking knowledge or higher.
• Experience with monitoring solutions (e.g., Splunk, SolarWinds, Grafana) for F5 performance and availability.
• Ability to pivot quickly, think creatively, and engineer robust solutions under changing conditions.
• A proactive Level III Engineer mindset, owning problems end-to-end and delivering enterprise-grade solutions.
• Outstanding written and verbal communication skills are required. Strong time management skills, including the ability to work independently and balance daily operations and projects.
• Ability to independently prioritize and re-prioritize tasks required. Ability to perform multiple tasks at one time, required. Ability to work as a team lead, and assist in any IT area is required.
• Ability to occasionally work early, late or on weekends as work demands is required.
• Solid foundation with security principles including HIPAA and SOX compliance preferred.

Preferred Qualifications:

• Experience with multi-datacenter F5 deployments and global traffic management.
• Familiarity with firewall and security platforms (Palo Alto, Fortinet, F5 AFM).
• Experience with certificate lifecycle management platforms (e.g., AppViewX).
• Competency in automation scripting (Python, Bash, and nice to have Ansible).

Cognitive/Mental Requirements:

• Communicating with others to exchange information.
• Problem-solving and thinking critically.
• Completing tasks independently.
• Interpreting data.
• Making timely decisions in the context of a workflow.
• Maintaining focus.
• Assessing the accuracy, neatness and thoroughness of the work assigned.
• Learning new tasks and completing tasks in situations that have a speed or productivity quota.
• Remembering and adhering to processes and protocols.

Physical Requirements and Working Conditions:

• Remaining in a stationary position, often standing or sitting for prolonged periods.
• Communicating with others to exchange information.
• Repeating motions that may include the wrists, hands, and/or fingers.
• Assessing the accuracy, neatness and thoroughness of the work assigned.
• No adverse environmental conditions expected.
• Must be able to provide high-speed internet access/connectivity and office setup and maintenance.
• Must be able to provide a dedicated, secure work area.

Base compensation ranges from $115,000 to $150,000 per year. Specific offers are determined by various factors, such as experience, education, skills, certifications, and other business needs. This role is eligible for discretionary bonus consideration.

Cotiviti offers team members a competitive benefits package to address a wide range of personal and family needs, including medical, dental, vision, disability, and life insurance coverage, 401(k) savings plans, paid family leave, 9 paid holidays per year, and 17-27 days of Paid Time Off (PTO) per year, depending on specific level and length of service with Cotiviti. For information about our benefits package, please refer to our Careers page.

Since this job will be based remotely, all interviews will be conducted virtually.

Date of posting: 09/29/2025

Applications are assessed on a rolling basis. We anticipate that the application window will close on 11/29/2025, but the application window may change depending on the volume of applications received or close immediately if a qualified candidate is selected.

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