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Sr Proposal Specialist

APTIM
Denver, CO Full Time
POSTED ON 12/9/2025
AVAILABLE BEFORE 2/9/2026

Job Overview:

APTIM is searching for a Senior Proposal Specialist with engineering experience.to drive all aspects of the development of high quality and compliant architecture/engineering (A/E) proposals for Federal clients.

Key Responsibilities/Accountabilities:

  • Support engineering business development/capture staff, business unit leaders, subcontractors and partners, and subject matter experts with A/E-specific efforts.
  • Manage creation and maintenance of A/E collateral (including web-based and general marketing) to support proposals and ongoing contracts
  • Lead writing of various A/E sections including resumes, project descriptions, and technical approaches.
  • Lead development of SF330 packages with internal and subcontract personnel
  • Define and manage proposal budgets and schedules.
  • Lead content planning from compliant outline through win themes, section plans and graphics.
  • Coordinate proposal preparation team (subject matter experts/writers, graphic artists, contracts, and other key proposal development functions).
  • Lead effective, results-driven story-lining, kickoff, and review meetings in concert with the capture manager and delivery staff.
  • Conceptualize and develop strategic win themes and discriminators.
  • Facilitate development of compelling solutions with technical and program staff.
  • Apply APTIM's standard proposal management processes, to include schedule, compliance, outlines, storyboards, themes, action items, etc.
  • Develop targeted solicitation questions to ensure compliance.
  • Remain current on all solicitation amendments and modifications.
  • Perform quality check of all proposal sections and volumes to include creation and verification/validation of a detailed compliance matrix.
  • Ultimately responsible for compliance, accuracy and quality.
  • This position will ensure a creative, compelling, and compliant solution is evident in proposal documents and oral presentations.
  • Take end-to-end ownership and command of proposal development and related processes.
  • Write and synthesize proposal/marketing narrative in near-real time as required.
  • Lead and proactively participate in the development of oral presentation slide concepts and scripting.
  • Provide coaching for oral presentations.
  • Advance proposal knowledge-management processes.
  • Mentor new and junior proposal managers/writers

Basic Qualifications:

  • Experience in development of winning SF330 submittals.
  • A Bachelor's degree in an engineering-related discipline is desired.
  • 5-10 years of progressive experience working in a fast-paced, deadline-driven, high-volume environment in support of engineering programs. At least 2 years' experience supporting proposal efforts is desired.
  • General understanding of design work.
  • Must have the management skills necessary to direct and orchestrate large, multi-contractor proposal team efforts.
  • Relies on extensive experience and judgement to plan and accomplish goals.
  • Demonstrated organizational capability and ability to balance multiple competing priorities under deadlines.
  • Proven ability to conceptualize and write compelling, marketing-oriented proposal narrative and oral presentation slides from scratch as required.
  • Strong working knowledge of MS Office Suite business applications.
  • Excellent command of English grammar and punctuation is required.
  • Meticulous attention to detail.
  • You must be a self-starter and natural leader as you will have end-to-end responsibility for leading your team, up through delivery to the client, of a winning proposal.
  • Although not extensive, some travel as well as evening and weekend work may be required.

ABOUT APTIM
APTIM is committed to accelerating the transition toward a clean and efficient energy economy, building a sustainable future for our communities and natural world, and creating a more inclusive and equitable environment that celebrates the diversity of our communities. We specialize in environmental, resilience, and sustainability and energy solutions, as well as technical and data solutions, program management, and critical infrastructure. For every challenge our clients face, there is an opportunity for APTIM to innovate a fit-for-purpose solution that will raise your organization or community to a new standard of excellence.

What you can expect from APTIM:

  • Work that is worthy of your time and talent
  • Respect and flexibility to live a full life at work and at home
  • Dogged determination to deliver for our clients and communities
  • A voice in making our company better
  • Investment into your personal and professional development

As of the date of this posting, a good faith estimate of the current pay range for this position is $85K to $100K. Compensation depends on several factors including: experience, education, key skills, geographic location of the position, client requirements, external market competitiveness, and internal equity among other employees within APTIM.

Aptim Corp is committed to providing an extensive range of benefits that protect and promote the health and financial well-being of our employees and their families through the APTIM Benefits Marketplace https://aptim.makeityoursource.com/.

  • Medical, vision, and dental insurance: Through the marketplace, our employees can choose benefits from five metallic levels and 10 carriers to find the right benefits that work for them in their location.
  • Life insurance
  • Short-term and long-term disability insurance
  • Paid holidays, vacation, and sick leave (eligibility based on company policy and applicable law)
  • 401(k) APTIM offers three 401k plans through the Aon Pooled Employer Plan (PEP). The specific plan you are eligible for depends on the business unit you are in. The details of the largest plan are found here:
  • APTIM 2025 401(k) Plan Features (makeityoursource.com)
  • APTIM - Helpful Documents

 

Watch our video:
About APTIM - In Pursuit of Better

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Salary : $85,000 - $100,000

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