Senior Cybersecurity Integration Engineer

Job Description

Job Description

POSITION OVERVIEW

The Senior Cybersecurity Integration Engineer secures and integrates the Customer's enterprise API gateway, drives it through the Risk Management Framework to a signed Authority to Operate (ATO), and keeps it authorized. The role pairs hands-on security engineering at the API boundary with ownership of the System Security Plan and the continuous monitoring that sustains it. Requires an active Moderate Background Investigation (MBI) at start.

RESPONSIBILITIES

• Design and enforce API security policy — authentication, authorization, token validation, rate limiting, payload validation, threat protection
• Manage TLS, mutual TLS, and certificate and key lifecycle across all environments and trust relationships
• Onboard applications, vendors, and SaaS services, coordinating firewall, proxy, DNS, and load balancer changes with owning teams
• Integrate the gateway with enterprise identity and federation services
• Harden gateway and hosts to STIG/SCAP and feed security telemetry to the enterprise SIEM
• Promote configuration through the Customer's environments under Government change control
• Author and maintain the SSP and control narratives against NIST 800-53 Rev 5, covering boundary, inventory, inheritance, and tailoring
• Run the RMF package to ATO: evidence, assessor walkthroughs, finding resolution
• Sustain ConMon: recurring scans, false positive validation, remediation and retest, POA&M closure, deviation requests, monthly reporting
• Perform security impact analysis on changes and troubleshoot across gateway, network, identity, and application layers

REQUIRED QUALIFICATIONS

• Active MBI, current and transferable as of your start date
• U.S. citizenship, as required for Customer contractor staff
• Eight years of hands-on cybersecurity or integration engineering on enterprise API gateway, IAM, or boundary security platforms in production, including three years in a Federal FISMA environment
• Production ownership of an enterprise API gateway or comparable platform: policy authoring, upgrades, certificate lifecycle, environment promotion, and production support
• Depth in API and web security protocols: OAuth 2.0, OpenID Connect, JWT validation, SAML 2.0 federation, mutual TLS, PKI, and the OWASP API Security Top 10
• Experience integrating services across network and security boundaries, coordinating changes with separate firewall, proxy, and identity teams
• Authorship of a System Security Plan for a Federal system, writing control narratives from actual configuration and documenting inherited, hybrid, and tailored controls
• Experience carrying a system or major component through RMF to a signed ATO, then sustaining it under continuous monitoring
• Command of FISMA and NIST 800-37, 800-53 Rev 5, 800-53A, and 800-137
• End-to-end vulnerability management: scanning, validating false positives, remediating, retesting, and documenting closure
• Linux administration on RHEL or CentOS, shell scripting, and SIEM log integration such as Splunk
• Technical writing strong enough that control narratives hold up under assessor review
• Bachelor's degree in Engineering, Computer Science, Cybersecurity, or Information Systems, or equivalent hands-on experience

PREFERRED QUALIFICATIONS

• An active professional security certification such as CISSP, CISA, CISM, CAP or CGRC, GIAC, or Security+
• Time as an ISSO or ISSM, or directly supporting one, on a FISMA-reportable system
• Hands-on authoring inside a GRC or RMF tool of record such as eMASS, Xacta, or CSAM
• An active vendor certification on the program's gateway platform, or willingness to earn it within 90 days; training provided
• Prior support to a Federal financial or tax administration program
• Experience with configuration-as-code, separated control and data planes, and API-driven gateway administration
• Depth in a federation platform such as Ping Federate, Ping Access, or CA SiteMinder