In the role of Water Resources Engineer – Modeler, we'll count on you to:Provide advanced technical support and task leadership on water resources projects related to:Water supply and reservoir operations modelingHydrology development and analysisReservoir simulation, optimization, re-operation, and decision supportHydrologic and climate change modeling, including ensemble and statistical analysesFlood risk management, FERC relicensing, and ecological enhancement projectsContribute to and, where appropriate, lead technical tasks within multi-disciplinary project teamsSupport project management activities for small- to medium-sized projects, including scope, schedule, and budget trackingMentor junior staff and support knowledge transfer, technical review, and staff developmentParticipate in client coordination, including technical meetings, work sessions, and preparation of client-facing deliverablesApply strong QA/QC practices, ensuring clear documentation, reproducible analyses, and high-quality deliverablesContribute to the development and improvement of HDR's technical tools, workflows, and best practicesProvide project engineering and task management, conduct difficult to complex hydraulic and hydrologic modeling; conduct stormwater collection systems modeling and design; collect, assimilate and present data in reports, memos and public forums; lead production of design calculations and technical reports; and lead preparation of engineering plans and specifications for design of detention facilities, storm drains, flood control facilities and other hydraulic structuresWork independently in addition to planning, organizing and assisting groups of medium to large teams of professionals and technicians dependent on project/taskConduct water resources planning, plan formulation and concept development, and develop planning documentationAssist in water resources permitting effortsPerform other duties as neededPreferred Qualifications5 or more years of experienceExperience with water infrastructure planning studies, extreme hydrology, and/or consequence analysisExperience with water supply operations modeling such as CalSim and CalLiteExperience with climate change analytical tools and datasetsExperience with reservoir and system modelingExperience with water temperature and water quality modeling (e.g., HEC-5Q, CE-QUAL-W2)Experience with risk-based planning and risk-informed decision makingFamiliarity with integration of resiliency into the planning processLinear programming, optimization, and decision-support modelingScripting and automation using Python/Jython, WRESL, VBA, or similar toolsFamiliarity with NEPA and ESA processes, including supporting environmental compliance, biological assessments, effects analyses, and coordination with environmental and regulatory teamsRequired QualificationsBachelor's degree in Engineering or equivalent fieldPrevious experience in water resources engineering projectsRequires professional engineering license recognized by the licensing board for the location of the position offered. Skills such as scripting (e.g., WRESL, Python/Jython, or VBA) and experience with CalSim II and CalSim 3, CalLite, VIC, HEC software (HEC-SSP, HEC-HMS, HEC-ResSim and both HEC-RAS 1D and 2D), water temperature modeling (HEC-5Q, CE QUAL W2), climate change analytical tools and datasets (e.g., Global Circulation Models and downscaling methods), linear programming and optimization would be considered beneficial.