Mirepoix LLC


Passion. Experience. Determination.


Mirepoix founders Joel de Jesus and Caroline Grossman first began working together on public-health advocacy in 2010, when Joel became vice president of business development and marketing at her long-time client, Magellan Diagnostics. Joel joined in Caroline’s now decade-long fight against the scourge of lead poisoning, teaming up to highlight and combat regulatory and financial barriers to blood-lead testing. 

Our advocacy work took us across the country in an effort to uncover and overcome the special challenges inherent in environmental health and the disparate policy arenas that goes with it – from housing and education to juvenile justice. We have met extraordinary, dedicated people along the way – in all levels of government and in academia, in health plans and in health centers, healthcare providers, educators, community advocates, and parents. That’s why we founded Mirepoix: to bring together the various stakeholders necessary to design and implement best practices that improve health outcomes – tailored, like a good mirepoix – to reflect the specific needs of the targeted region.

The expansion of our practice into strategic business consulting grew organically out of our individual consulting practices. We each have our own set of complementary skills, areas of expertise, and capabilities, and as such, turned to each other often on an informal basis for advice and support on our individual client’s projects. And we found the end result was often even better for it. We soon realized that we could offer business clients a richer and more-comprehensive set of consulting services if we did it as a team under the rubric of Mirepoix LLC.

BTW, the better-together phenomena has also manifested itself in another region of shared interest and pursuit – cooking (the other reason we decided to call our company Mirepoix). Caroline introduced Joel to her leeks and vermouth make almost everything better philosophy (she learned that from her mother Alberta); Joel taught Caroline about the world of salty sauces from Asia Pacific and pork belly and (if you care about flavor) not to be afraid of fatty meats.

Who we are:

 ☎ (847) 343-0537 |  joel@mirepoixllc.com

☎ (847) 343-0537 | joel@mirepoixllc.com


joel de jesus

Joel leads our commercial operations advisory initiatives. He has more than 20 years of experience in the global diagnostic, medical device, and large-scale manufacturing industries, working for companies ranging from small biotech start-ups to multi-billion dollar companies such as Baxter Healthcare and Motorola. He brings wide-ranging talent and experience in upstream and downstream marketing, but really excels in implementing plans and tactics by establishing strategic relationships with government agencies and industry groups that foster revenue growth.

At Immucor Inc., he successfully navigated though various government agencies and its contractors to secure favorable coverage and payment for the company’s first FDA-approved molecular-diagnostic product. His leadership of cross-functional teams has produced a strong legacy of customer-centric product development, quality, and enterprise effectiveness. Previously, Joel was VP of marketing and business development for Magellan, where he led the company’s efforts to build relationships with Medicaid managed care organizations, public health and social service providers, and policy-makers. He established Magellan’s founding support for National Minority Quality Forum’s LeadRiskIndex.com site, creating a first-ever tool enabling the public to research and better understand the risk for lead poisoning at ZIP-code-level granularity. In 2017, Joel was appointed as a member of the AABB Coding and Reimbursement Committee. The committee is charged with addressing transfusion medicine and cellular therapies reimbursement issues. He is certified as a green belt in Lean Six Sigma.


Lisle, Illinois

Master’s of Business Administration

Bachelor’s degree, Biomedical Engineering


CPT Coding and Coverage Determination − First to achieve approval for a Proprietary Laboratory Analysis (PLA) code from the American Medical Association. Gained specific product coverage determinations for Medicare reimbursement

Specializes in Transitions During and After M&A − 

  • Carve-out of Fenwal from Baxter
  • Divestiture of Trek Diagnostic to ThermoFisher
  • Post-acquisition integration of LifeCodes into Immucor Inc.

 ☎ (781) 771-5579 |  caroline@mirepoixllc.com

☎ (781) 771-5579 | caroline@mirepoixllc.com



A seasoned communications and public affairs professional, Caroline’s clients range from global equipment companies, clinical labs, to biotech startups and the enterprises that house, support, and fund them. To that end, she directs the communications and public affairs programs for LabCentral and the BioLabs Network, which builds and operates premium coworking lab facilities around the country, designed specifically for science-based startups to help them go further, faster on limited capital investment. 

Caroline also is dedicated to public service, working to strengthening communities through health, environment, housing, and education initiatives. She served as the inaugural chair of the best practices committee for the Institute for Medicaid Innovation − a nonprofit dedicated to generating and disseminating evidence demonstrating the effect of Medicaid managed care on access to quality care for vulnerable populations.

Caroline has been instrumental in helping to draft a major rewrite of the Commonwealth’s lab-licensing requirements and practice standards to better align with federal standards, best practices, and national norms through the Massachusetts Department of Health Clinical Laboratory Advisory Committee (MA CLAC) – the first major overhaul of the regs in nearly four decades. In March 2018, her fellow members selected her to be the MA CLAC chair. 

She also chairs the nominating and development committees as a board member of Charles River Community Health, a federally qualified health center that serves more than 12,700 patients annually through community- and school-based clinics in the Boston area. Over the past decade as a public health advocate, she has worked with legislatures, advocates, and departments of health in numerous states, chalking up numerous successes.


Medford, Massachusetts

Bachelor’s degree, fine arts, magna cum laude



  • Maryland Clinical Laboratory Regulatory ReformDelivered key testimony to General Assembly resulting in the establishment of Task Force to Study Point-of-Care Testing for Lead Poisoning; provided expert support to Department of Health and Mental Hygiene staff for Task Force and Lab Advisory Committee meetings leading ultimately to elimination of regulatory restrictions 
  • Healthy Rhode Island State Healthcare Innovation PlanActive member of two work streams (Community Health Initiatives; Health Information, Technology and Measurement) for the Healthy Rhode Island State Healthcare Innovation Plan to advise the state as it develops the road map to transform its healthcare system from a volume-based system into one that is value based 
  • State of Connecticut General Assembly Official Citation – Awarded March 2012 in recognition of “exemplary health and educational advocacy” to raise awareness about the dangers of lead poisoning and its connection to minority health disparities and the achievement gap