The experience and expertise of our people is the secret to our success here at the Maytree Group. The practical and at times hard lessons learned by the first generation of Johnson and Armstrong, since joining the building industry in the late 1970’s, has shaped the 2nd generation of both families who joined the industry some 25 years later in the mid-2000’s.
This blend of old and new has culminated in a high‑performing team of professionals with varied and complimentary experience, providing unparalleled practical insight to any construction project or application. At its core, the company’s heritage and specialist capability particularly lie in the delivery of luxury bespoke homes and refined, small‑scale multi‑unit developments.
Our People:
Trevor Johnson, Senior Consultant & Founder of the ‘Maytree’ brand
Trevor began his career in the construction industry in 1978 as a Junior Surveyor; cutting his teeth at Fairview Estates and latterly at Gulbourne Ltd. He founded and became Director of Maytree Developments Ltd in 1989, successfully delivering numerous new build developments from commercial office blocks to bespoke high end residential properties and multi-unit residential developments, throughout Hertfordshire and Cambridgeshire.
Trevor established Octagon Design Consultancy in 2012, acting in the capacity of an architectural design consultant, leveraging his contractor intelligence to successfully navigate planning policy and prepare, manage and achieve planning and building regulations approvals for many New Build residential schemes. Trevor remains a Senior Consultant to Maytree Group and MCL.
Joining the building industry in the late 1970’s starting at Wilmott’s (more recently known as Wilmott Dixon), on their City and Guilds training scheme, Robert (Rob) would go on to build a successful career as a General Builder. This included as a regular sub-contractor to Maytree Developments through the 1990’s, before partnering with his long standing friend Trevor to form Maytree Ltd in 2002. Maytree Ltd gained a strong reputation for being a specialist in bespoke Residential projects, with a strong word of mouth client base of young professional families, redeveloping family homes and building new ones predominantly in St Albans, Harpenden and North Hertfordshire. Robert also remains a Senior Consultant to Maytree Group and MCL.
Robert Armstrong, Senior Consultant
Ross Armstrong BEng IEng MICE, Director
Maytree Group’s Commercial Director Ross joined Laing O’Rourke whilst at Loughborough University in 2007, on their Graduate Programme as a Site Civil Engineer before moving on to Costain in 2012 as a Section Engineer. He worked on a number of National Infrastructure Projects including the Thameslink Rail Upgrade and Crossrail, progressing through the engineering ladder as a Senior Civil Engineer where he gained professional recognition with the Institute of Civil Engineers (ICE), becoming an Incorporated Member IEng MICE in 2012.
He founded Armstrong Engineering Consultants in 2015 as a Senior Civil Engineer and Planning Manager, specialising in the NEC3 and NEC4 suite of contracts, consulting on Programme and Change Management. He and continues to work on various high-profile schemes including Gatwick Airport Improvement, The Silvertown Tunnel Project, HS2 and Manchester Airport Improvements, consulting for key clients, along-side his duties with Maytree Group.
Maytree Group’s Operations Director Callum joined the industry as an Engineering Technician at Farringdon Station Redevelopment for Laing O’Rourke in 2009, whilst studying at Portsmouth University. Upon graduating in 2012, he immediately secured a role with Byrne Brothers as a Gradate Site Engineer and began his tenure working on 240 Blackfriars delivering the sub/superstructure for a 22-storey high rise office block. From there he worked on multiple heavy Civils projects for Byrne Brothers including Woolwich Arsenal Redevelopment and Paddington Station Crossrail box. He left Byrne Brothers in 2013 and joined Costain as a Section Engineer on the London Bridge Station Redevelopment - a £1.2 billion project delivering the main station RC packages as part of the Thameslink upgrade on behalf of Network Rail.
Callum co‑founded Maytree Demolition, Maytree Groundworks and Maytree Landscapes in 2015 alongside his brother Ross. From building the business from the ground up to earning a reputation for reliability, integrity and expert insight, Callum has been instrumental in cultivating a loyal client base and driving the company into the multi‑million‑pound enterprise it is today.
Callum Armstrong BEng, Director
Billy graduated from Loughborough University with Ross in 2009 and gained strong heavy Civil Engineering and Site Surveying experience from his tenure at main contractors including Sir Robert McAlpine, John Sik & Sons and Acrabuild. Working on high profile Residential and New build schemes including One Hyde Park and the US Embassy in London, as well as large bespoke residential new builds across the South Midlands.
He joined the Maytree Group in 2018 and currently leads the groups technical performance in all things site based; specialising in Field and Land Surveying, Site Engineering and setting out, data modelling and design solutions. His arm of the brand Maytree Engineering and Surveying, was brought into Maytree Group in 2023.