Water Resources Engineer

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Mac Kay & Somps Civil Engineers, Inc.

As a Water Resources Engineer at Mac Kay & Somps, you’ll apply your technical skills to challenging and rewarding storm drainage, flood control, and water resource projects. You’ll work alongside experienced engineers, gaining exposure to both land development and public infrastructure in California Bay Area and beyond. This is an excellent opportunity to build on your hydrology/hydraulics expertise while expanding your skills in design, modeling, and project coordination.

Depending on your experience level, you may work independently or train under the supervision of highly experienced hydrologists. In addition to hydrology and hydraulics, you will also get experience in a wide range of Civil projects including utility infrastructure projects and public and private development.

Mac Kay & Somps Civil Engineers is seeking a Water Resources Engineer to join our Pleasanton, CA office. This position is ideal for engineers with 3–7 years of hands‑on experience in storm drain system design, surface hydrology, and hydraulics who are looking to deepen their technical expertise and grow toward a senior‑level role.

Candidates must have a B.S. in Civil Engineering (or related field) from an ABET‑accredited university and be a licensed Professional Engineer (PE) in California. Must be authorized to work in the United States.

Responsibilities may include:

• Designing storm drain systems, open‑channel/closed‑conduit hydraulics, and surface hydrology solutions
• Assisting with master drainage plans, flood studies, and stormwater management designs
• Performing rainfall–runoff simulations and 1‑D/2‑D hydraulic modeling
• Supporting drainage and flood control design for both private developments and public infrastructure projects
• Preparing technical reports, calculations, and supporting documentation
• Coordinating with internal teams, clients, and public agencies to ensure accurate, efficient project delivery
• Project management and design of Land Development and Public Infrastructure projects

We are looking for candidates with:

• 3–7 years of civil engineering experience, with a focus on storm drainage, flood control, and hydrology/hydraulics in California
• Proficiency in AutoCAD Civil 3D, Microsoft Word, and Excel
• Experience with Army Corps HEC models (HEC‑HMS, HEC‑RAS), SWMM, XPStorm, Innovyze, and/or WaterCAD
• Strong technical writing and verbal communication skills
• An eagerness to learn, collaborate, and take on increasing responsibility over time
• Experience in land development drainage design and public infrastructure projects is highly desirable

If you are interested in applying to Mac Kay & Somps and need a reasonable accommodation to do so, or would like to apply for general consideration, please contact  or 925‑416‑1790.

Compensation: $50 – $65 an hour

For a complete listing of all our openings, please visit our careers webpage:

Few engineering firms match our track record in California. We are one of the largest and most successful privately held civil engineering firms in Nor Cal, with offices in Pleasanton (SF Bay Area) and Roseville (Sacramento Valley). Consistently listed in the top 500 design firms in the US by the ENR as we successfully integrate engineering, planning, and surveying expertise to get projects built efficiently and cost effectively.

Founded in 1953, Mac Kay & Somps helped drive growth in Northern California after World War II and we continue that same energy today. Our multi‑disciplinary teams provide services from entitlements through construction.

Mac Kay & Somps is an equal opportunity employer.

Mac Kay & Somps offers an excellent compensation and benefits package which includes:

• Competitive salary
• Generous bonus structure
• Profit sharing trust/401(k) plan
• Student Loan Paydown program and tuition assistance
• Excellent medical, vision, and dental plans with Company contributions to a health savings account
• Life, AD&D, LTD/STD insurance
• Wellness Reimbursement Program
• and more!

Mac Kay & Somps also offers flexible work schedules and an active, high‑energy work environment with periodic Friday barbeques/lunch gatherings. The company hosts a holiday lunch and an annual company wide dinner party along with other social activities throughout the year.