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Our Team Leaders

Our Team of Professionals:

Not everyone in the industry has what it takes to meet our high professional standards. Every member on our team is carefully selected and trained on an ongoing basis to provide our clients the highest quality, craftsmanship and customer service possible.


Stephen Cosgrove, Founder,  BS Engineering

Stephen comes from England, and brings with him that old world sense of quality, beauty and craftsmanship.  He comes from a three generations of  master craftsman, and has always loved building beautiful things. He graduated from college as an electro-mechanical engineer and went on to design, build and maintain large commercial properties  This background gives him a sixth sense of knowing how to figure out almost any problem.  His common sense and practical nature, allows him to come up with low cost and effective solutions.  He came to America with his two sons to be with the love of this life,Lisa Cosrove,  and he founded Cosgrove and Sons.  He goal was to have a company to reflect the best of the old world -  quality , durability and beauty, with the new world, innovation and progress.

Lisa Cosgrove, Manager

Lisa is both a CPA and a designer. Her education includes BS in Finance and minor in Fine Art. Her finance background gives her the skill set to manage the many small details that any construction job entails and make sure they are attended to in a timely manner. Her art background and years of interior design work gives her the ability to lead you to design decisions that will delight you. She carefully listens to your ideas, balances that with your budget, to come up with designs and material choices that make your remodeling dreams easy to manifest.

Marcio Maradiegos

Marcio is a master builder and  has been in construction for  over 25 years, with experience in virtually every aspect of construction.  He has been the supervisor for new home construction, and major remodeling projects.  His emphasis on quality and doing the job right, along with his warm personality , has endeared him to many a client

Phillip Cosgrove, Owner in training

Phillip studied construction at college, then joined his father to work side by side with him, learning from a master.  Clients are always impressed by his care, diligence and respectful nature.  Plus he is gorgeous!

Request an Estimate

Cosgrove and Sons are highly skilled professionals who treated our home like their own. Steve's team are great guys and we notice how they reflect his caring attitude. The design and the workmanship is excellent, and we just love our new Kitchen! I would never think of having any other company work on my house. Thanks once again for a fantastic job!

Bethesda, MD
R. G.