Doug Waitt
Founder, Co-Owner, President
[email protected]

Doug started working in the HVAC field January of 1981 and started Design Day Mechanicals on March 17, 1988. He graduated from UNH in 1974 with a Bachelor of Arts, not an Engineering degree. His knowledge of HVAC engineering is primarily through self-apprenticeship and asking a lot of questions through the School of Hard Knocks. On his first day of work at Concept Mechanicals in 1981 his supervisor put a sheet of drafting paper in front of him and told him to put HVAC in the title block. Doug thought to himself “I wonder what that stands for?” The rest is history. Doug lives and works in New Ipswich, NH in a house he built in 1980, still heats with wood stoves and his own self-harvested cord wood, and has still convinced Kitty to stay with him since their marriage in 1975. They have one daughter Iris, quality not quantity.

Andrew W. Arsenault, P.E., LEED AP
Co-Owner, Vice President, Engineer of Record
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Andy Arsenault is a licensed Professional Engineer in the states of NH, ME, MA, VT, CT, NY & CO. He brought a diverse background to DDMI in June 2013 having worked for large and small engineering firms, mechanical contractors and HVAC equipment manufacturers’ rep firms. Andy is a proud UNH graduate with bachelor’s and master’s degrees in Mechanical Engineering. He lives in Wells, ME with his wife Judy, a couple of dogs and occasional visits from their combined five grown children.

Rick Gagnon
Co-Owner, Sr. Plumbing Designer
[email protected]

Manchester was Rick’s family’s home base when his father was deployed during 20-years of service with the Army. Rick graduated from West High School in 1977 and from N.H. Vocational Technical College with an Associates in Applied Science in Drafting Technology in 1979.

Graduating from the Tech on a Thursday, he started the following Monday at Concept Mechanicals, drafting plumbing, HVAC, and fire protection. As he gained experience, he eventually assumed responsibility for the plumbing design, drafting and estimating. Rick was part of the interview team tasked with hiring an HVAC draftsperson. With an urgent need to hire someone, the consensus was that “the next person through the door gets the job” . . . low and behold, in walked Doug for an interview! That was the start of a friendship and long working relationship.

In 1982, Concept Mechanicals consolidated with their parent company, Seppala & Aho Construction Co., Inc. When S&A closed in 1991, Rick’s responsibilities included Plumbing Department Manager, as well as plumbing design, drafting and estimating.

Rick met his wife, Julie, on a blind date in January 1983 and they married in May 1984. After a short temp position turned into a full-time job for Julie at S&A in 1984, they have continued to work together ever since, through the S&A years right into their home-based business.

Rick worked with Doug and James on side jobs starting in 1984, while still working at S&A (ink on mylar pin-bar overlay system, until James taught Rick & Julie the AutoCad basics). After a short stint with Palmer & Sicard in the Fall of 1991, Doug convinced Rick that he could keep him busy full time and Rick and Julie have been pushing out DDMI projects ever since, doing plumbing design/drafting and HVAC drafting in the early years, and eventually dedicating their time to the plumbing side of projects.

Rick and Julie love it when a plan comes together but very much enjoy their time away from the office doing all kinds of outdoor activities and spending time with family.

John Waitt
Co-Owner, Sr Designer
[email protected]

John graduated from the University of New Hampshire with a Bachelor of Science in 1979. After college, he worked as a product technician and product designer for a performance chemical company. He started his own design and drafting company in 2001 and joined with the HVAC engineering group Design Day Mechanicals, Inc at the same time. He lives in a house he and his wife built (with the help of many friends and family) on 20 acres of land in the southern lakes region of New Hampshire. He is always up for a good road trip, hike or both together. He considers himself a tree hugger and dirt worshipper.

David Magnuson
Co-Owner, Sr HVAC Designer
[email protected]

Over twenty-five years of experience in the HVAC industry beginning in the field as a duct fabricator and installer.  After gaining experience later roles included project manager, estimator and system designer. 1999 brought the transition from HVAC work to a fulltime drafting and design.   2008 marked the beginning of the relationship with Design Day Mechanicals, Inc, eventually becoming a co-owner in 2015.

Hobbies and interests include gardening, music, electronics design, camping, gem mining, lapidary work and general tinkering.

Monique Magnuson
Co-Owner, HVAC Designer
[email protected]

Monique has been with Design Day Mechanicals, Inc since 2010 and became a co-owner in 2015. Prior to joining the DDMI team, in a search to figure out what she wanted to do when she grew up, Monique explored many different professions. She has worked as a pharmacy technician, a life skills facilitator for adults with acquired brain injuries, an executive assistant, a customer service supervisor, a Realtor, an upholsterer and many more. The common theme through all her exploration in professions has been a desire to grow and learn new skills

Upon joining the DDMI team, Monique spent the first several years devoting her time to LEED energy modeling. In 2016, she transferred to drafting and design where she continues to learn and grow.

Hobbies and interests include sewing, gardening, genealogy, music, gem mining, reading and, most importantly, finding a way to have a good laugh at least once a day.

Joe Trainor
[email protected]

Joe started full time with DDMI on January 1, 1998 after 30 years in the carpentry trade. I was invited over one day to Doug’s home office to watch him do some drafting with Autocad. After 20 minutes or so of watching him run the program he looked over his shoulder and asked “What do you think?” and I replied that I was blown away. I could not believe what I was seeing and at that point he offered me a job that changed my life. The rest is history. I am eternally grateful to both Kitty and Doug for the opportunity they gave me.

Mark R. Renaud
Sr. Plumbing Designer
[email protected]

Mark joined the DDMI team full time in January 2016 after working (38) years in mechanical contracting where his duties included estimating, project management and plumbing design. He holds master plumbing and gas fitter licenses in the state of New Hampshire and is a graduate of Manchester Community College with a (2) year degree in plumbing and HVAC design. He lives in Goffstown, NH with his wife Nicki and loves spending time with his step children Alyssa and Garret and grandchild Michael.

Iris Waitt
HVAC Designer
[email protected]

Iris started work at Design Day in October 2015. Though she grew up in the corporate headquarters and dabbled in some load calculations while still in high school, she spent most of her life puzzled as to why her dad and uncle would always look up at the ductwork whenever they went out for a family dinner. Satisfied to let the mystery lie, she received a bachelor’s degree in Psychology from Boston University in 2013 and expected to work in the human services field for the foreseeable future. However, somewhere along the way, she started to look for a change in career and the allure of the diffusers and mitered elbows above slowly drew her gaze upwards. And lucky that they did: as someone who is always curious to learn more, and eager to take on a new challenge, the work at Design Day has proved to give her the perfect balance of growth and unwavering support. As a wise dog Snoopy once said: “Keep looking up… that’s the secret of life.”

Tyler Wilson, E.I.T.
Engineer-in-Training, HVAC Designer, Draftsperson
[email protected]

Tyler Wilson joined the DDMI team in June 2019 and is an Engineer-in-Training (EIT) in the state of NH. Tyler grew up with his parents and two brothers in Derry, NH, and currently lives in Milton, NH. He graduated from Worcester Polytechnic Institute with a bachelor’s degree in Mechanical Engineering and is currently working towards his master’s degree also in Mechanical Engineering at WPI. While at WPI, Tyler wrestled for four years, and played on the club rugby and golf teams. Now that his full-time college career is over, he enjoys exercising, playing guitar and piano, and spending time with friends and family.

Travis B. Somero, E.I.T.
Engineer-in-Training, HVAC Designer, Draftsperson
[email protected]

Travis Somero is an Engineer in Training in the state of NH. He is an alumnus of Southern New Hampshire University, where he received a bachelor’s in mechanical engineering in 2018. Before coming on board Design Day Mechanicals, Travis worked in the construction field when not in college. Travis Somero currently resides in New Ipswich, NH where he is close to his family and friends.

Kitty Waitt
[email protected]

Kitty Waitt is Doug Waitt’s first wife (they have been married since 1975). She spent her formative years in Boonton, New Jersey. She moved to New Hampshire in 1978 and has lived in the house that Doug built since 1980. She has a BS in Home Economics from the University of New Hampshire. Class of 1974-1/2. It was at UNH that Doug and Kitty met. After passing by his dorm room (neat as a pin) she thought “I could live with this guy.” She loves all things homemaking, especially cooking (but not of books.) She is responsible for half of Iris Waitt’s DNA. She is DDMI’s part-time Bookkeeper, as well as a keeper of books. (She claims they are good insulation. Doug has his doubts, but what does he know?)

Mathilde Krebs
Project Manager
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Mathilde joined the DDMI team in February 2020 after working for a consulting engineering firm in Portland ME, a manufacturer in France, and exploring New Zealand and Canada. Born and raised in France, her master’s in general engineering from Icam (Nantes, France) taught her she knows not much about a lot of things and decided to pursue a double master’s with the Polytechnique School of Engineering in Montreal (Canada) but this time specializing in mechanical engineering for the built environment. Part nerdy energy modeler/computational fluid dynamics analyst/mechanical engineer, part down to earth wood worker, part crazy motorcycle rider, she enjoys vacuuming the daily Bernese mountain dog load of shedded hair when (and only) in need of mental rest. Mathilde lives in South Berwick with her husband Mark and their two dogs River and Kit, at the confluence of the Salmon Falls and the Great Works rivers where they enjoy watching the bald eagles and tidal ebb and flow.

Simone Flynn
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Simone graduated from Rensselaer Polytechnic Institute in 2014 with a Bachelors degree in Mechanical Engineering. Upon graduating, she worked as a mechanical designer for 3 years at another HVAC design firm before deciding to take a break from the 9-5 grind and try out real estate. After two successful and educational years in the real estate industry, and some self-discovery, Simone realized her passion for engineering and jumped back in by joining the team at DDMI. Her hobbies include hiking 4000 footers, quilting, home renovations, and making apple cider and maple syrup on her homestead in Durham, NH where she lives with her husband Shaun, 3 cats, and growing family!

Ryan Lacey, PE, CEM, LEED AP BD+C, QCxP
Professional Engineer
[email protected]

Ryan is a licensed Professional Engineer that is passionate about building energy performance, safety, and helping clients save money through the practical design and operation of their building mechanical systems.

With over 12 years of experience working with multi-family, commercial, and institutional buildings, Ryan’s proficiency in both design and energy engineering allows him to provide Design Day Mechanicals’ valued clients with reliable and energy efficient mechanical system solutions.

In his free time, Ryan enjoys building custom furniture, playing music, mountain biking, and fishing. He looks forward to someday applying his knowledge of sustainable architectural design, building science, and mechanical engineering to design and build his own net-zero passive/active solar home.

Ryan holds a BS Architecture from Keene State College and a MS Architectural Engineering from the University of Colorado – Boulder (Building Systems Program). He is a licensed Professional Engineer in the state of NH, MA, VT, and ME, a Certified Energy Manager (CEM), a LEED Accredited Professional in Building Design and Construction (LEED AP BD+C), and a Qualified Commissioning Process Provider (QCxP).