F5 Network Engineer III

Company: CACI
Location: Springfield
Posted on: April 1, 2026

Job Description:

Job Title: F5 Network Engineer III Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local * * * The Opportunity TCS is looking for a Network Engineer to maintain compliance with QA standards as well as ensuring service performance indicators are met or exceeded. Experience in reviewing Mission related change requirements such as Change Requests (CRQs) and determining impacts on Transport activities across the Enterprise while providing Technical solutions. Responsibilities • Engineer and implement solutions for Projects based on customer Change Requests • Serve as the technical representative for assigned projects. • Provide recommendations on newly submitted actions items. • Coordinate issues with the appropriate owners/organizations. • Evaluate and report on new/emerging network/communication technologies to enhance capacity, performance and reliability of the network. • Evaluate and recommend changes and/or technology upgrades to address performance, standardization and industry best practices • Follows all Customer network security processes and procedures, ensures compliance with all Government policies. • Develop and maintain network architecture diagrams. Qualifications Required: • Security Clearance: active TS/SCI • Experience with F5 (APM, AFM, SSLO, etc.) • Competent with mutual Transport Layer Security (mTLS) • Experience with Online Certificate Status Protocol OCSP revocation • Familiar with DoD PKI, Kerberos, LDAP, Active Directory, HTML • Ability to describe and troubleshoot TLS/SSL handshake/connection issues • Experience with HTTP, SAML and OAuth • Network design,engineering, and implementation (Advanced Level) • Creation of network related Rough Order Magnitude (ROM) equipment lists and costing • Understanding of DISA and IC standards and processes • Interpersonal skills, to help negotiate priorities • Ability to work weekends and evening hours as needed • Ability to work independently with little direction and guidance • Ability to obtain and maintain a CI polygraph • 10 years related technical experience in Network and Transport technologies, tools, and techniques • 5 years experience with large-scale enterprise/global networks in a high paced diverse environment • Understanding and experience with the DoD Architecture Framework and other key DoD network architecture and strategic planning instructions Desired: • Master’s degree in Computer Science or related field • F5 Networks Certified Technology Specialist (CTS) • CISCO CCNP, CCVP, CCNA or CCDP (or equivalent) • ITIL v3 Foundations • ISC2 CISSP - What You Can Expect: A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation. An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality. A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. The proposed salary range for this position is: $86,600 - $181,800 CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.

Keywords: CACI, Annandale , F5 Network Engineer III, IT / Software / Systems , Springfield, Virginia