The Team
James Jackman NCH Arb
Managing Director
James Jackman has spent all of his adult life within the tree industry and has in excess of 10 years experience as a practical Arborist (Dendricion). After 9 years of working for Treeline Services Ltd, James had ideas for taking Treeline Services into the twenty first century. After becoming the Managing Director in April 2003 Treeline Services has expanded it’s operation, as well as, remaining true to it’s founding principles of excellent customer service, tree surgery of the highest quality along with friendly and knowledgeable staff.
Andrew Robertson
Foreman
Andy having endured 3 years as a goundsman/second climber is now a Merrist Wood trained foreman, fulfilling his full potential in climbing duties. He enjoys playing in a band and hopes to be top of the charts before he turns 40.
Neil Barton
Arborist
Neil joined Treeline Services Ltd in 2008 having completed a RFS Certificate in Arboriculture at Merrist Wood College. A keen runner, he has completed numerous half marathons and last year ran the Brighton Marathon.
Chris Sleeman
Chris Sleeman started at Treeline Services in 2009 after completing an ND in Arboriculture at Merrist Wood. His nickname is ‘Sparky’, which his brother gave him.
Stuart Hescott
Arborist
Stu is the oldest, wisest, best looking and the grandad of the firm. He trained at Brinsbury College to gain his NPTCs and is also heavily into his motorcycle trails, which he thinks is more skilful than motorcross or enduros that the boss does, but James would strongly disagree.
Clive Cogger
Arborist
Clive Cogger left school at 16 and started his tree surgery career. He worked in the industry for about 2 years where he learnt a lot of skills in tree work. Clive left tree surgery to seek other skills but found that he really missed the work. He has been working for Treeline Services since 2008. Clive’s hobbies are swimming and socialising.
Matt Sleeman
Foreman
Matt Sleeman trained at Merrist Wood completing NCH in Arboriculture along with his NPTCs. Matt is also heavily into his landrovers and off roading and is known for his exceptional skills for felling large trees.
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Kristan Llewellyn
Kris has been working at Treeline since 1997 “ I enjoy the different challanges each day brings, in my spare time I enjoy playing golf and tennis with friends”
Mark Delia
Mark started at Treeline in 2010 after successfully completing his NVQ 10 week tree surgery course at MerristWood College.
Annie Russell
Annie is the company administrator and started her employment with Treeline in 2005, She is the familiar voice on the end of the phone. Highly dedicated to delivering world class customer service and satisfaction and always giving a calm, decisive and professional approach to any situation.
Adam Golding
Adam started at Treeline in 2007. He has recently qualified in Tree Inspection and is very keen to further his career within the industry. He enjoys spending time with his family and friends.





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