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Senior Proposal Writer Jobs in Riverside, CA (NOW HIRING)

MVE & Partners, INC.

Senior Project Manager

Irvine, CA · On-site

$110K - $130K/yr

Contribute to proposals, RFPs, charrettes, design competitions, and business development * Maintain ... Write and edit architectural specifications; coordinate legal parameters with owners * Apply ...

Hanchey

Senior Environmental Consultant

Irvine, CA · On-site

Core responsibilities include: proposal preparation, conducting fieldwork (i.e., soil, groundwater ... Must have good oral and written communication skills. DESIRED SKILLS AND BEHAVIORS: * Combines both ...

Nucor

Senior Estimator

San Bernardino, CA · On-site

$93K - $125K/yr

This role prepares accurate cost estimates, bid proposals, and budgets by reviewing project plans ... Excellent verbal and written communication skills. * Strong organizational skills with the ability ...

Nucor

Senior Estimator

San Bernardino, CA · On-site

$93K - $125K/yr

This role prepares accurate cost estimates, bid proposals, and budgets by reviewing project plans ... Excellent verbal and written communication skills. * Strong organizational skills with the ability ...

SJ Amoroso Construction

Senior Estimator

Irvine, CA · On-site

Analyze subcontractor proposals for scope completeness, pricing, qualifications, and overall value ... Strong verbal, written, leadership, negotiation, and communication skills. * Proficiency with ...

S.J. Amoroso Construction

Senior Estimator

Irvine, CA · On-site

$150K - $200K/yr

Analyze subcontractor proposals for scope completeness, pricing, qualifications, and overall value ... Strong verbal, written, leadership, negotiation, and communication skills. * Proficiency with ...

Dar Group

Lead Traffic Engineer

Irvine, CA · Hybrid

$119K - $176K/yr

... oriented Senior Transportation Engineer who is eager to serve as project manager or lead traffic ... Support business development through proposal writing, client relationship building, and ...

Wamco, Inc.

Senior Electrical Design Engineer

Irvine, CA · On-site

$111K - $150K/yr

Develop associated cost estimates and time schedule for customers proposals and bids * Work closely ... Possess strong written and oral communication skills * Technical skills with aptitude to learn and ...

Mesa Energy Systems, Inc.

Senior Account Manager

Irvine, CA · On-site

$135K - $166K/yr

... write, and review client proposal documents including financial and technical sections, using EMCOR Service/Mesa Energy Systems standard template and pricing models. • Developing sales at defined ...

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All JobsProposal Writer JobsSenior Proposal Writer JobsSenior Proposal Writer Jobs in Riverside, CA

Senior Proposal Writer information

See Riverside, CA salary details

$31.8K

$96.6K

$178.4K

How much do senior proposal writer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for senior proposal writer in Riverside, CA is $96,564.00, according to ZipRecruiter salary data. Most workers in this role earn between $74,100.00 and $105,400.00 per year, depending on experience, location, and employer.

What does a senior proposal writer do?

A Senior Proposal Writer leads the development of compelling proposals to secure business contracts and funding. They analyze requests for proposals (RFPs), collaborate with subject matter experts, and craft persuasive content that aligns with client needs. They also ensure proposals comply with company standards and deadlines. Their role often includes editing, formatting, and managing the proposal timeline to improve win rates.

What are the key skills and qualifications needed to thrive as a senior proposal writer?

To thrive as a Senior Proposal Writer, you need expert-level writing, editing, and project management skills, often supported by a bachelor’s degree in English, communications, or a related field. Familiarity with proposal management software (such as RFPIO or Qvidian), proficiency in MS Office, and knowledge of government or industry-specific procurement processes are highly beneficial. Strong collaboration, deadline management, and attention to detail are crucial soft skills for excelling in this role. These capabilities ensure high-quality, compliant submissions that increase the organization’s chances of winning new business.

What are the most commonly searched types of Proposal Writer jobs in Riverside, CA? The most popular types of Proposal Writer jobs in Riverside, CA are:
What are popular job titles related to Senior Proposal Writer jobs in Riverside, CA? For Senior Proposal Writer jobs in Riverside, CA, the most frequently searched job titles are:
What job categories do people searching Senior Proposal Writer jobs in Riverside, CA look for? The top searched job categories for Senior Proposal Writer jobs in Riverside, CA are:
What cities near Riverside, CA are hiring for Senior Proposal Writer jobs? Cities near Riverside, CA with the most Senior Proposal Writer job openings:
Senior Proposal Writer jobs near you
Infographic showing various Senior Proposal Writer job openings in Riverside, CA as of August 2026, with employment types broken down into 100% Full Time. Highlights an 59% In-person, and 41% Remote job distribution, with an average salary of $96,564 per year, or $46.4 per hour.

Senior-level Human Health Risk Assessor/Toxicologist

GSI Environmental Inc.

Irvine, CA • On-site

$120K - $150K/yr

Full-time

Re-posted 2 days ago

Job description

GSI is seeking a Senior-level Human Health Risk Assessor or Toxicologist for our Irvine, CA or Emeryville, CA office. The ideal candidate will have 8 to 15 years of experience performing human health risk assessments in support of site characterization and remediation projects, including developing work scopes and budgets, managing internal staff and subcontractors, and communicating (written and oral) with clients and other stakeholders. In addition, the ideal candidate will possess strong leadership, communication, and team-building skills to support growth in our California offices.

Responsibilities:

  • Provide human health risk assessment and toxicological consulting services to internal and external clients in California.
  • Develop and implement technical approaches for data evaluation and reporting in support of site assessment and remediation projects, including Phase II Environmental Site Assessments, Preliminary Endangerment Assessments, Remedial Investigations, Remedial Action Plans, Vapor Intrusion Assessments, and Remedial Action Completion Reports.
  • Direct and perform risk evaluations, from small screening-level risk assessments to large, multi-pathway human health risk assessments.
  • Prepare written proposals, manage project budgets, and communicate with client and project stakeholders.
  • Provide technical training and support to junior staff to ensure field tasks are completed with precision and consistency.
  • Work directly with clients to identify specific project needs and communicate results.
  • Engage with regulatory oversight agencies to obtain approval for risk evaluations, selection of cleanup goals, and environmental case closure.

Qualifications:

  • 8 or more years of professional experience practicing human health risk assessment.
  • Bachelor’s Degree in chemistry, toxicology, public health or a related field; Master’s Degree or higher preferred.
  • Experience overseeing data compilation and validation, development of exposure point concentrations, fate and transport modeling, and preparation of forward human health risk assessments.
  • Familiarity with DTSC and RWQCB risk assessment guidance.
  • Must have excellent written and verbal communication skills, and the ability to work well independently and in multi-disciplinary teams.
  • Experience managing projects/tasks, including the preparation of proposals, cost tracking and maintaining budgets.
  • 40-hour OSHA HAZWOPER certification
  • Valid driver’s license and clear driving record
  • Ability to travel

Salary range: $120,000 - $150,000+/year.

Exact compensation may vary based on level of education and experience.

Apply