Founded in 1989 and headquartered in Reston, Virginia, SOSi is a private defense and government solutions business specializing in advanced technology systems and mission support. Its capabilities include data science, software development, network engineering, intelligence, surveillance, and reconnaissance (ISR), and logistics.
Job DescriptionSOSi is seeking a highly accomplished and industry-recognized Senior Proposal Manager to join our Proposal Development team at our headquarters in Reston, Virginia. The successful candidate will provide strategic leadership and management oversight throughout the proposal development lifecycle, ensuring the delivery of compelling, compliant, and customer-focused proposals that support company growth objectives. Join SOSi and play a critical role in shaping winning solutions and driving business growth across the federal marketplace.
Essential Job Duties
- Lead and mentor cross-functional proposal teams, fostering collaboration and driving the development of innovative, customer-centric proposal solutions.
- Analyze and interpret Requests for Proposals (RFPs), identify proposal requirements, create compliant outlines, and develop compliance matrices to guide volume leads and authors.
- Support the development and execution of proposal strategies and win themes throughout the proposal lifecycle.
- Participate in strategy sessions and oversee the creation and execution of Proposal Management Plans (PMPs).
- Partner closely with Capture Managers to develop and implement winning strategies for corporate-led opportunities.
- Create content plans that effectively address technical, management, and overall proposal evaluation criteria.
- Develop, maintain, and implement proposal management tools and processes to track progress, mitigate risks, and ensure adherence to proposal schedules and milestones.
- Build and manage proposal teams by coordinating with organizational leadership to identify key contributors and allocate appropriate resources.
- Direct and coordinate technical, management, past performance, staffing, and schedule-related proposal activities in accordance with solicitation requirements and SOSi proposal processes.
- Collaborate with external teaming partners to ensure the delivery of high-quality, compliant proposal submissions.
- Utilize compliance and cross-reference matrices to ensure traceability across proposal volumes and alignment with solicitation requirements.
- Lead proposal color team reviews and drive continuous improvement through the review process.
- Contribute to proposal development by writing and editing sections, including management plans, past performance narratives, and key personnel resumes, as needed.
- Conduct compliance reviews and provide peer-review support on other business development efforts.
- Perform additional duties as assigned.
Minimum Requirements
- Must be able to obtain a Secret clearance.
- Bachelor's degree or an equivalent combination of education and relevant professional experience.
- Minimum of 10 years of progressively responsible proposal development experience, including at least 5 years as a Proposal Manager within the federal government contracting environment.
- Formal proposal or capture management training, such as Shipley Associates or a comparable methodology.
- Proven ability to analyze complex RFPs, develop compliant proposal structures, identify required resources, and ensure proposal responsiveness.
- Demonstrated success leading proposal teams, conducting status meetings, and managing the end-to-end proposal development process.
- Experience facilitating early-stage solutioning sessions, including Blue Team reviews and strategy workshops.
- Strong critical-thinking, analytical, and problem-solving abilities.
- Excellent verbal and written communication skills.
- Ability to thrive in a fast-paced, dynamic, and growth-oriented environment.
- Exceptional organizational skills with the ability to manage multiple priorities and deadlines simultaneously.
Preferred Qualifications
- Active in scope Secret security clearance.
- Master’s degree in a relevant discipline.
- Professional certifications, affiliations, or memberships with organizations such as APMP (Association of Proposal Management Professionals) and/or NCMA (National Contract Management Association).
Work Environment
The Senior Proposal Manager will typically work in an office environment, but there may be opportunities for remote work. The role may require occasional travel to meet with clients or attend industry events. The position often involves working under tight deadlines, which may necessitate working outside of regular business hours.
Working at SOSi
All interested individuals will receive consideration and will not be discriminated against for any reason.
Skills Required
- Must be able to obtain a Secret clearance
- Bachelor's degree or equivalent combination of education and experience
- Minimum of 10 years progressively responsible proposal development experience, including 5 years as a Proposal Manager in federal contracting
- Formal proposal or capture management training (e.g., Shipley Associates or comparable)
- Proven ability to analyze complex RFPs and develop compliant proposal structures and compliance matrices
- Demonstrated success leading proposal teams and managing end-to-end proposal development
- Experience facilitating early-stage solutioning sessions, Blue Team reviews, and strategy workshops
- Strong critical-thinking, analytical, and problem-solving abilities
- Excellent verbal and written communication skills
- Ability to thrive in a fast-paced, dynamic environment and manage multiple priorities and deadlines
- Exceptional organizational skills
- Active in scope Secret security clearance
- Master's degree in a relevant discipline
- Professional certifications or memberships such as APMP and/or NCMA
SOSi Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SOSi and has not been reviewed or approved by SOSi.
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Healthcare Strength — Health coverage is considered a relative strength, with international plan options and substantial employer contribution that support OCONUS and travel-heavy work. Company materials also highlight a comprehensive medical offering alongside wellness support.
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Retirement Support — A 401(k) program is available, with indications of employer matching though specifics are not publicly detailed. This suggests foundational retirement support for eligible employees.
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Career-Linked Recognition & Rewards — Compensation is often characterized as competitive for cleared, hard‑to‑hire, and certain overseas or mission‑critical roles. Pay levels appear closely tied to contract demands, clearance, and location.
SOSi Insights
What We Do
SOSi is a technology and services integrator focused on the aerospace, defense, and government services industry, described as one of the largest private, founder-owned companies in its sector.
